DallasMakerspace - electronics

wonder when someone shows up in here?

Don't hold your breath!

When I posted in metal shop I was the first post since December

c-c-c-combo breaker

Hey, check out this expensive resistor I found! http://www.mouser.com/search/ProductDetail.aspx?R=0virtualkey0virtualkeyPTF5610K000TZEKv

11:02 PM

A steal at only $12 per unit, it's a 0.01% 5ppm/C precision, low-noise job

Not sure why, but I've joined now. Spent several hours at the space today. Finally got the new controller board hooked up to my 3D printer.

@tmc4242 because you arent afraid of change!

Which controller board

MKS-Sbase. Smoothieboard Chinese clone

Yeah good board let me know how it works out

@pearce - I detest change, especially change for the sake of change only. Hangouts is a better platform for my use. As previously noted.

1:33 AM

Will do Mitch. Have to actually get it to print something next. Hopefully the calibration phase won't be too bad.

@tmc4242 i assure you i didnt do it for the sake of change, sorry your work has it banned, but they probably did that to make sure you are working at work. if youd like to argue about the merits of it we can move to a PM or #general_chatter

Nothing to argue about. I see no merit. Your comments about my work are not welcome either.

yo anyone know a good way to reuse raspi heat sinks?

1:45 PM

I think my rpi1bs are crapping out after 3 years

Get some thermal tape to put them back on with...

thanks

4:57 PM

@Raymond they sell that at micro centre?

i think tanner's will have it

6:41 PM

if you would've asked yesterday i couldn't picked up some today in silicon valley before flying home tomorrow on a red-eye

6:42 PM

but the store closes in 19 minutes and i'm across town from it

6:43 PM

you can also find thermal adhesive in 2 part form but that's more permanent. fry's and micro center both carry that

@Raymond is thermal pads the thing ur talking about that's permanent?

7:15 PM

that's what I'm buying at micro center.

7:15 PM

tanner doesn't have thermal tape

radioheads unite. where is everybody? on the roof?

https://youtu.be/r5V8ecsrxeY

RobsonandJeromeVEVO

Robson & Jerome - Up On The Roof

Thermal pads are different... they aren't adhesive. MC only carries the pads, thermal compound, or thermal adhesive 2-part epoxy mix.

9:42 AM

they don't carry thermal tape that holds the heatsink on without screws/clamps

@Raymond that just remind me of https://1.bp.blogspot.com/-4gbBGWxt8Uk/WF52Qjr0JnI/AAAAAAAAByk/gp_PX0pDfr4sNooLks8pkbFGxII6HdemwCLcB/s1600/Groot.jpg

would anyone know of a good way to "short" two gpio pins in tiny package that will do the short/switch on a VCC pulse but does send a electric signal to either connector?

12:00 PM

I'm thinking something like a very tiny relay of sorts, but not sure which parts and part number would work

maybe a mosfet would work? but how would one close the circuit so it acts more like a button?

It sounds like you need a conversion from momentary switch behavior to latching behavior.

1:09 PM

http://www.mosaic-industries.com/embedded-systems/microcontroller-projects/electronic-circuits/push-button-switch-turn-on/latching-toggle-power-switch

1:10 PM

Figure 2 sounds like what you are wanting to do where the Power Input net and the Switched Power net are the GPIO lines that you wish to short together. (edited)

I'm looking for help with networking two Raspberry Pis via an Ad-Hoc network. Does anyone know who I could talk to about this?

@themitch22

@Denzuko.sdf.org

lol. yes I'm the resident IT/Linux/RPI guru @pogopadawan

9:47 PM

so I guess you're doing this over WiFi? would you be using ipv4 or ipv6?

9:48 PM

also, would you be using rasbian or arch?

Yes. I'm using ipv4 on raspbian. Currently I'm using project Byzantium to get a base working, but it doesn't give me as many options as I need. If you are here now I'm in the common area to talk more if needed.

Left my water bottle in the room. Will pick up later this evening.

sorry @art I just found a spanner I was using in my pocket when I got home. Guess I had a brain fart or got destination. I'll be by this weekend to wrap up a few things on my back log so I'll bring it by and donate a little to your committee while I'm at it. (edited)

Thanks!

the spanner is right back at home in his drawer at the space. again sorry about that. is there anything pressing you guys are needing for the committee like tools or supplies?

At the moment no. Will be ordering in the near future. Need to do a walk around the Space to round up/return tools. If you run across tools w/ yellow on them, they probably need to be returned the ELab.

will do

Can I power motors (4) rated at 4v each with a 5v 10a power supply

Just checking, is the 'Wavetek Model 143' Function generator working and available to use? I am planning to do some experiments this weekend so wanted to know before visiting the space. Thanks.

Can I get someone's help on a Line 6 Delay Pedal? It's never been dropped or anything, but I assume it's a loose jack connection or something simple. It powers on and everything, but no audio. Any help would be greatly appreciated! (718) 795-3187

As far as the expansion goes. May I suggest a computer test bench.

I got Ultra Violet & Side emitting LEDs coming for the Mouser sign. I think UV would look the cleanest. But having a colorful Bluetooth one where anyone could scan the bar code and play with different light configs on their phone would be fun also. Any opinions but anoying if its not on the outside of the wall. I suggest UV inside & Color RGB outside

Anyone want to try to repair a UPS? It has, appearantly, a bad charging board that was taken out. I modified the board to allow for an external fuse w/o success in fixing the board.

https://mcuoneclipse.com/2018/05/05/sneak-preview-diy-smt-pick-place-machine-with-openpnp/amp/?__twitter_impression=true

Sneak Preview: DIY SMT Pick & Place Machine with OpenPnP

I apologize: I have not been blogging much in the past weeks :-(. One reason is that I’m working on a DIY SMT/SMD Pick&Place machine which keeps me busy most of my spare time :-). I admit…

Does anyone have a suggestion to where I could purchase solar panels (DIY small 9V) locally? I checked Tanners but they don't have one that large. Unless I missed it.

Harbor Freight sells some of what I'll call midsize panels, but I think they're 12V. Maybe a camping store, but you're likely to pay out the nose for them as they'll be productized.

@VenomV you can get a higher voltage panel (like 12v-24v) and a Buck convertor (<$10) to bring the voltage down to 9v

Does anyone know who might sell a 40 position 1mm pitch ffc ribbon cable locally?

@VenomV I have a couple

Dang I'm just catching up since I've been inactive for awhile

7:33 PM

That openPnP machine looks awesome

i'm looking for a python tutor, bi-weekly, $20, 90 minute sessions

Yo. Let's not spam that any farther

Hey, so I don't know if this was passed or if it was just being talked about

5:33 PM

but y'know that major victory for right to repair? Able to reverse engineer devices and software for the purposes of repair, in exception to any EULA / TOS / Copyright whatever

5:33 PM

for example, iphones / ipad DRM, john deere onboard computers, etc

5:35 PM

well i had this shower thought that this exception could be used for the development of repair techniques, or for larger groups to publish fixes for these devices so that as companies make the DRM more difficult to break, individuals don't have to reinvent the wheel. Larger groups can stay on top of it and make it easy.

5:37 PM

if it's legal for an individual to reverse engineer DRM to repair their device, is it also legal for a nonprofit to reverse engineer DRM for anyone to be able to repair the same device? I'd imagine so. If that's the case, we should totally do that. I think there are people here qualified to do stuff like that. (edited)

there's already quite a few how to fix websites and youtube channels that will provide detailed instructions on, well, pretty much anythign you would need to fix ever. https://www.ifixit.com/ for starters. among many others

iFixit: The Free Repair Manual

iFixit is a global community of people helping each other repair things. Let's fix the world, one device at a time. Troubleshoot with experts in the Answers forum—and build your own how-to guides to share with the world. Fix your Apple and Android devices—and buy all the ...

6:54 PM

not sure if that's what you're referring to? a collection of information easily referencable?

ifixit is a good resource yeah

10:31 PM

but i mean unofficial patches to circumvent apple drm for example (edited)

10:31 PM

we could develop them under the pretense of repairability

ohhhhhhhhhhhh

3:11 AM

cough you mean like jailbreaking

im pretty sure the jailbreaking gets released by anyone and everyone that can develop it as fast as possible. OS cracking is, well, a science and art whoever has a ridiculous amount of free time and experience to crack it. also some phones on the lower end of the android are just flat out not worth cracking due to low specs that make it usefulles for just about anything outside manufacturer intended tasks?

1

3:13 AM

sorry not trying to overly criticize, just providing a feasiblity assemsement

3:14 AM

like i've definitely done like 3/4 of a comp sci degree and jailbrekaing is not something volunteer workers can just knock out in a few sittings.

I see ok

question, if you step down DC power with a buck converter... say a 12V 3A power supply to 5v with a buck converter rated for 3 amps

11:14 AM

do you get 5V 3A?

11:15 AM

curious as if stepping down power affects the available output current in any way

I'm pretty sure amps are pulled from the device using it

11:20 AM

I don't play with buck/boosters though

right, just curious if the available is still 3A

11:20 AM

say I have 3 fans that each require 1A

11:21 AM

if I step down 12v to 5V for the fans, can I still power those 3 fans

The booster should have it detailed on the spec right?

all I can find is what it's rated ofr

11:21 AM

for*

Dang

So Pearce and I were talking about neopixels... I'm talking with my DPRG buddies and I think I might be able to implement a touch slide at best, or 2 touch buttons at worst for a mode up/down

im digging into the 187 page guide now

im not totally sure i follow

12:12 AM

actually im not even sure i know how the touch lamps work except that it has to be on a metal surface

So on the nine dollar trinket board, it has 3 of the pins of the actual chip able to be used for capacitive touch . One of those is also the direct memory access pin for driving the neopixels.

12:41 AM

But that still leaves us another normal gpio pin for another selection. So in theory one cap touch can be mode up, and the other mode down

12:42 AM

I tried updating to circuit python 3.x but lost my code, but I had it at home still so tomorrow night I should be able to virtually start fresh

interesting. i think id only need one though since all the sides are soldered together

12:43 AM

but making any of my stained glass stuff cap touch activated sounds awesome

If we try a strip of copper tape or what not, I should in theory be able to make a slider but I need to do some trsting

12:44 AM

Anyways I've got the hankering to figure this out

youd have to figure out how to turn a single large surface into a slider, like maybe have it compare between the two pins connected to the same surface

Yes

Ok I determined my prior code wasn't on circuit python but in arduino... which I already know how to do cases, so should have something this coming weekend. Right now I'm slammed with work learning all the new things in my new gig

borrowed one standard PC power cord, will be bringing it back to lab at conclusion of software meet n geek

https://www.youtube.com/watch?v=z71h9XZbAWY

Megaprocessor

Megaprocessor Tour 1 - (fixed audio)

ALU.. Memory.. yeah that's got VCC written all over it.

6:55 PM

time to cross post

thats awesome

https://www.youtube.com/watch?v=l7rce6IQDWs

Ben Eater

The world's worst video card?

4:09 PM

I'm going to build one of these for the hell of it. but thinking of using fewer chips. (ie eeproms and 8bit or 12bit shift registers)

4:10 PM

any suggestion on chip models?

maybe two pairs of sn74hc595 and 74ls163a, which then trigger logic on the eeprom. or would one still need a 74ls273?

4:35 PM

like shown in https://hackaday.io/project/20161/gallery#8425197f9672fd5b9318046303ae1c5c

Gallery | Breadboard VGA from TTL and EEPROM

Concept tester for VGA output using two old-skool EEPROM's and a handful of 74LS series TTL chips.

Neat

I've been waiting for that part 2 to come out

12:03 PM

I'm game

oh this one: https://www.youtube.com/watch?v=uqY3FMuMuRo

Ben Eater

World's worst video card? The exciting conclusion

1:44 PM

I've been waiting for it too

1:45 PM

I'll order up the parts if someone wants to put together the BOM then we can get a class on the calendar

is the battery pack spot-welder in good working order?

it is

9:57 AM

malcom uses it regularly

well then. I hear that lithium fires are a true sight to behold up close and in person.

i'd be down

11:05 AM

we can do it at your house?

11:05 AM

ill stab the cell

that would involve borrowing the battery spot welder, which probably isn't allowed. best to do it in the e-lab.

Does anyone have experience programming z80 microprocessors?

I did Z80 assembly pgmng a long while back. What do you want to do?

Hey guys, quick question. I'm needing to get some max7219 in short order for a Halloween costume. All the ones I'm finding on Amazon and ebay wouldn't be here for at least a month. Do you guys have a website or a local place that might be useful? (edited)

Mouser has them in stock. Usually ground shipping takes a day or if you drive out to Mansfield you can do will call.

2

E-Lab want to schedule an election sometime before the Board meeting?

Weirdly Amazon has max7219 chips and matrix displays with delivery available for tomorrow. (edited)

Electronic Com Mtng Thurs Nov 7. It'll eventually make it to the Event Cal.....

2

6:50 PM

Wow. 300 Ah in such a small package!

2

I'll take two and power my house.

Quick question

8:19 PM

I have an Arduino Uno with a relay shield. I connected the positive of an extension cord in series with the relay contacts on the board and everything works fine when I'm plugged into the computer. As soon as I remove the USB, and connect it to a 5v power supply (board standard), the relays won't fire. The LEDs for the relays fire...but the relays themselves don't fire...any ideas?

I believe the relay board needs its own power. The 5v from a USB won't be enough to power it

But it powers off of the USB

8:42 PM

Wouldn't the 5v be stronger than the USB

USB is going to be 5v and .05 amp unless you have a powered usb

8:43 PM

I'm thinking you don't have the amps

hmm...okay...so how would I go about powering the shield seperately?

Wall wart?

What's that?

8:45 PM

Oh I just looked it up

8:46 PM

So...there's a bunch of pinouts on the relay shield...correct me if I'm wrong, but wouldn't it need to input into the VCC and GND pinout?

In theory once you have more power it will work since the led worked. That means it got the right code

hmmm

8:48 PM

So what would be the suggestion? There isn't a spot for a power supply in.

8:49 PM

not on the relay shield, anyway

Gonna drive home then I can send pics

ok

8:49 PM

I'll send media in the meantime

What Arduino are you using

uno

8:51 PM

@Deleted User you plugged 5v into the black DC jack? Or did you use a USB charger?

Well that's where the change happened

9:36 PM

it works when I have it in USB

9:36 PM

when I plug in the jack, the relays don't fire

and yes, 5v

Few possibilities, where did you get the relay board from?

10:21 PM

And keep in mind that DC jack isn't actually designed for 5v, it's meant for like 7-12v iirc. They have a 5v regulator on it, sonif you give it exactly 5v the regulator cant regulate and behaves unexpectedly

HMMMM OK

10:40 PM

sorry for the caps

10:41 PM

So, do I need to remove the regulator?

10:41 PM

or get a different power supply to handle the entire pinned out board

Well usb is 3.3v if it likes that. Feed it that

USB has NEVER been 3.3,

@Deleted User you should be good just using a USB cable and power adapter. USB is 5v. You really should not need a lot of amps for the relays. They are just magnetic switches.

@john a gorman well that doesn't answer the issue at hand, which is that the relays won't fire, but the LED for the relay does. Makes no sense

You were right that power isn't an issue if it works off the PC USB. As Pearce says, that's only 1/2 an amp

8:24 AM

I would look at the code

Where'd you get the relay board? This really depends on where the board gets its power from (Arduino provides 5v, 3.3v, and 'Vin' pins on its headers)

@michaelb the relay shield should be pulling power off the uno board

8:51 AM

So it will pull what it needs

It matters which pin the relay board pulls from.

8:57 AM

By providing 5v to the DC jack, the VIN and 5v pins will hover around 4.5v, and the 3.3v will still be 3.3.

8:57 AM

So if it pulls power from 3.3v that's not the issue. If it's expecting 5v then it could have problems

What Michael said. The LED on the relay output may have enough power after the voltage drop, but the coil may not make an appropriate field strength.

1

I mean the shield just stacks onto the Uno and pinouts all go through to the relay board

5:13 PM

So I'm not really sure. I'll grab my multi meter later and check it to see

If you know who you bought it from they might have the schematic available

5:17 PM

But really the answer is find a 7-12v supply and try that.

I mean it's an Arduino Uno and a Seeed Relay Shield

5:31 PM

But does that 7-12v power supply plug into the built in connector on the Uno?

Yeah the 7-12v plugs into the black DC jack on the uno

Ok cool thanks. I'll have to track that down.

Random question, does one have to flash a fresh esp8266 esp01 or does the at command modes work out of the box with an ftdi board?

1:35 AM

Ordered https://www.amazon.com/gp/product/B07NWD1TQM and just like the last attempt a few years ago I get zilch from the port but the device does seem to be "functioning" when tested with a multimeter.

take it that its an unknown.

(edited)

https://youtu.be/aScAZReGQc0 I wanna build on of these, and I don't wanna electrocute myself

GreatScott!

HACKED!: CRT TV becomes a crude Oscilloscope

It's pretty easy to do that may mod, and most CRTs have good isolation of the HV from what you'd want to mess with. Since the tubes are typically replaceable, they are commonly using Spade connectors. You can pull one pair and if it is the vertical scan done, otherwise replace spades and grab the other pair These units are fun, but unless you make a new driver for the X sweep you are limited in what you can do with it.

Crts are pretty easy to be careful with. There's one real big wire that attaches to the tube and transformer to watch out for

When I was 13 i switched the horizontal and vertical deflection guns so I could watch the tv in a mirror.

there's the big wire, but also the caps on the driver board for the flyback. Those can operate at intermediate voltages and be a little nasty

saw a WEGA TV out on the curb the other day

1:48 PM

but odds are it's been rained on

!members

There are currently 1868 members.

!

4:16 PM

!members

There are currently 1868 members.

Forrest Mims III library

oh man I used to have a lot of those mini notebooks when I was a kid

Me too .. it was what I looked through as a kid ... seeing all the circuits I could build .. some of them I had no idea about and others I built

4:42 AM

I can say I still don't know what a Monostable Multivibrator is... lol .. but it was in the books somewhere (edited)

The other book that I had was a 74 series reference from TI .. thick book but had all kinds of parts and datasheets about what they did

https://www.youtube.com/watch?v=LLsDq0cN2H8

SR electric

Top 3 Electronics Project With BC547 transistor

like i've definitely done like 3/4 of a comp sci degree and jailbrekaing is not something volunteer workers can just knock out in a few sittings.

@SackOvRats (Brenly) if you're talking about jailbreaking devices, it's really easy, and you can even do it with an Android device, though not sure how practical: https://www.youtube.com/watch?v=tc0GqDueUIE

downthecrop

How to Jailbreak iOS with Android Phone checkra1n Tutorial Guide

2:33 AM

if it's legal for an individual to reverse engineer DRM to repair their device, is it also legal for a nonprofit to reverse engineer DRM for anyone to be able to repair the same device? I'd imagine so. If that's the case, we should totally do that. I think there are people here qualified to do stuff like that.

@Timooni Here are some resources: A really good guide for beginners (helped me get started): https://github.com/iosre/iOSAppReverseEngineering https://iphonedevwiki.net/index.php/Main_Page

iosre/iOSAppReverseEngineering

The world’s 1st book of very detailed iOS App reverse engineering skills :) - iosre/iOSAppReverseEngineering

Main Page

2:34 AM

@Timooni you can also ask people in #computer-committee which is for the computer committee

fixed. yall stop changing names.

2

@pearce I actually wasn't asking for that but I appreciate it

!members

There are currently 1807 members.

!members

There are currently 1790 members.

Figured I cross-post this: https://talk.dallasmakerspace.org/t/virutal-dms-coder-night-dialogflow-walkthrough-w-james-henningson/70415 Post has more info, but James is doing a walkthrough of Dialogflow at the next DMS Coder Night on Tuesday at 7pm

I’m looking for a long, thin, triangular bit. My solar battery tripped itself. And I need to reset it. But no external reset.

A tri tip driver bit?

12:23 AM

I thought only Nintendo used those

Nope. It’s in this damn solar box. I have them, just not thin enough.

also, long and thin? I've seen those on ~⅛" precision kits but not on standalone screwdrivers.

post a pic of the screwhead

Actually I've seen them on ¼" sets as well

post a pic of the screwhead

@pearce that may be hard. I’ll try.

?

More of voided triangle.

hft appears to have triwing sets

1:41 AM

These are them. Maybe harbor freight will have them.

1:41 AM

The length is my issue.

1

Opinions? Repairable?

5:26 PM

This isn't mine, its a friends who can't afford a new card, so he is wanting to try repair

Can you source the caps?

5:41 PM

It looks like they are through hole, so it's possible

5:42 PM

But if it's a multi layer board that's going to make it harder to get a good connection

When DMS reopens you should check the surface mount parts reels. I know you are looking for through hole but we may have these. Otherwise Mouser: https://www.mouser.com/ProductDetail/Panasonic/16SEPG270W?qs=sGAEpiMZZMsIwzbKW1rlgT%2FuUXYsF3eFp3kKFppACPaLJLK8zyEYPQ%3D%3D

Yea, that looks like a multilayer board. Can try replacing the Caps, but if there's internal corrosion it's boned.

Thanks, yeah the corrosion is my main concern here

michaelb was kind enough to post this over on Talk https://www.mouser.com/ProductDetail/Vishay-Semiconductors/IRFR9110PBF?qs=%2Fha2pyFadugQQbILjHmoo3kh%2FNLnP4FYxYisnf9PD5yO5Yk6SPESyQ%3D%3D&utm_source=octopart&utm_medium=aggregator&utm_campaign=844-IRFR9110PBF&utm_content=Vishay on my inquiry https://talk.dallasmakerspace.org/t/control-board-component-replacement-dummy-style/71154 and I'm considering it, but I'm wondering if anyone who bops along here more frequently than there might have a suggestion for where to get a few of these little guys (mouser's price is fine, but shipping from or driving to Mansfield isn't...all that palatable...)

Control Board Component Replacement (Dummy Style!)

I have this circuit board It appears to have blown a…component. Any idea what this is? (I assume it’s like it’s buddy right next door) Any ideas where to get something like this (esp. right now)? Anyone want to virtually hold a (effectively) 4-year-old’s hand in what...

While y'all were bickering I thought I might try and be productive

11:37 PM

Tomorrow we'll see if I'm brave enough to leave that 10mF cap on the output

@michaelb what's it do? Is that KiCad?

Yeah, it's KiCad, I jumped over from eagle about a year after Autodesk went subscription based. It's got it's quirks but it works fine for the simple stuff I do.

yeah, I don't do much, but when I do, I use KiCad. Haven't really done anything in 5 yet.

This is a not yet finished 5v power supply, 90-245Vac in. The goal here is 3A continuous output with as small a quiesscent power draw as possible. Hopefully under 0.1W at 240v.

12:12 AM

Few things are working out if I really need the two giant 270uF input caps, it needs better output capacitance, figure out if it meets inrush specs, and I should probably check the diodes/fet since they're more or less just whatever mouser has the most stock of

Having some issues with my current project. trying to use some MOSFET's to convert 3.3v PWM to 5v PWM for a LED strip for this thing: https://talk.dallasmakerspace.org/t/show-and-tell-may-2020/71025/11

Show and Tell May 2020

Working on adding the D20 (which I bought from @PearceDunlap, who makes them) to my network as my first home automation device for testing. I replaced the normal controller on it with an ESP32 device (node-MCU) and made it output the common anode signals (just straight PWM, no...

12:14 AM

It's possible I just bought a completely wrong MOSFET (used a IRF520), but I can never get it to switch 5v (it's actually lower than the 3.3v)

12:14 AM

low frequency PWM too, knocked it down to about 100Hz, no difference

12:15 AM

I might try to simulate it on LTSpice etc. at some point, but I have to get back up to speed on all that stuff too (including importing a custom model for the part)

Yeah that's a power mosfet so it's really designed for a 10v Vgs. Any gate voltage below about 4v and you won't fully turn it on, which makes the design much more complicated.

yeah, just randomly Google'd "3.3v pwm to 5v led strip" and I see someone whining about this exact MOSFET: https://www.raspberrypi.org/forums/viewtopic.php?t=261273

12:20 AM

clearly Mouser gave my newbie ass too many options

If I'm looking for a logic level fet I'll usually pull up the datasheet and look at the Rds(on) parameter. Not the value, but the test conditions. They spec Rds(on) at the Vgs they intend for you to run.

12:20 AM

Logic level fets will have a spec at Vgs=3.3v for example.

12:21 AM

And lol what I said earlier really is my method. What do they stock the most of. I.e, I'm not doing something special, and others know better, so what's everyone else buying.

yeah, I watched the Digikey video series on KiCad, and when sourcing parts (obviously on Digikey), he just sorted by what they had the most stock of, and his reasoning was they stock what sells...hehe

So here's a sparkfun level shifter, they're using a BSS138: http://cdn.sparkfun.com/datasheets/BreakoutBoards/Logic_Level_Bidirectional.pdf If you don't want surface mount, adafruit sells a 'Logic Level N channel fet', the IRLB8721. Obviously mouser sells both parts.

12:26 AM

Also, that level shifter works in both directions and is a neat little trick with mosfets.

I randomly ran across something on Amazon and solder'd one up (I probably need to test connections on it, because I suck at soldering): https://smile.amazon.com/gp/product/B07LG646VS/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

12:28 AM

Not sure exactly what mosfet that uses, let me see if I can read it...

12:32 AM

12:34 AM

Looks like one of these https://www.ebay.com.au/itm/KSA1298-J1Y-30V-800mA-200mW-PNP-General-Purpose-Silicon-Transistor-SMD-SOT-23-ON-/362722388191

KSA1298 J1Y 30V 800mA 200mW PNP General Purpose Silicon Transistor ...

SMD Transistor Code: J1Y. Maximum Power Dissipation (Pd): 200mW. Polarity: PNP. Type Designator: Silicon Transistor. Type of Transistor: General Purpose Switching. Emitter-Base |Vdc|: 5V. Collector Current | Ic | : 200mA.

12:35 AM

https://www.mouser.com/ProductDetail/ON-Semiconductor-Fairchild/KSA1298YMTF?qs=ljbEvF4DwOPmgba0q87XWg%3D%3D

That would be surprising. It looks like a copy of the sparkfun circuit (with a different transistor), and I don't think that circuit works with a PNP transistor.

I think I got what I paid for on the price etc...hehe

12:37 AM

good soldering practice for the header pins I guess...I need it

12:43 AM

very similar markings on their parts too: https://cdn.sparkfun.com//assets/parts/8/5/2/2/12009-07.jpg

12:48 AM

hmmm, time to dig thru my bins:

I am trying to learn kicad but I need to learn electronics first

1:13 AM

I might just start with a simple break out board

FWIW later Michael, I found a model and simulated it in LTSpice. 3.3v definitely doesn't fit the bill (blue is voltage at drain, green is PWM of 3.3v):

2:42 AM

I don't seem to get decent results until around 4v:

2:43 AM

Please excuse my laziness on not putting in a proper schematic symbol for the MOSFET...hehe

2:49 AM

I'll find a replacement instead of the IRLB8721, because everyone seems to be...

2:49 AM

out

2:49 AM

of

2:49 AM

stock

2:49 AM

I keep hearing a rumor that electronics has a Flir, any idea what model?

Nope but it lives on the top shelf on the center bench in a black case. Hmm, not on the wiki https://dallasmakerspace.org/wiki/Tools#Electronics

Tools

Damn. There's a new Flir that's tempting me https://www.flir.com/products/c5/ Was curious what we had at the space.

With the FLIR C5 in your pocket you’ll be ready anytime to find hot fuses, air leaks, plumbing issues, and more. Identifying hidden problems is easy with the 160 x 120 (19,200 pixels) true thermal imager, MSX® (Multi-Spectral Dynamic Imaging), 5-megapixel visual camera, and LE...

Ours looks like this model https://www.flir.com/products/tg165/

The FLIR TG165 Spot Thermal Cameras bridge the gap between single spot infrared thermometers and FLIR's legendary thermal cameras. Equipped with FLIR's exclusive Lepton® micro thermal sensor, these cameras let you see the heat so you know exactly where to target the measuremen...

This company's name always makes me chuckle, because it's pronounced (as close as matters to me) the same as the Bubble Gum Company Fleer. https://en.wikipedia.org/wiki/Fleer Which immediately causes me to say (usually to myself) "Fleer Funnies - Starring Pud!" https://www.worthpoint.com/worthopedia/1930s-fleer-dubble-bubble-comics-1815862692

Fleer

The Fleer Corporation, founded by Frank H. Fleer in 1885, was the first company to successfully manufacture bubble gum; it remained a family-owned enterprise until 1989. Fleer originally developed a bubble gum formulation called Blibber-Blubber in 1906. However, while this gum...

SHIPPING TO US ONLYRare to find 1930's Fleer Dubble Bubble comic No. 107 drawn by Joe Bowers, who also created the Pud comics after these. Please check out my other listings for more lots of these. Fr

12:09 PM

no sympathy for the frog

The real tragedy is assuming DC will cause something to 'kick violently'.

You could make a reciprocating motor if you use a reed switch and tie a magnet to the foot

6:59 PM

Until the muscles run out of electrolytes and

Quick, Erik, if Mitch put a reed switch/magnet on the foot, what value capacitor would I need to put in parallel with the inductor to limit the frog foot vibrations to 10 hurt-z?

how fast can someone to open and close the switch? if you incentivize them with money?

The inductor and capacitor naturally oscillate so once the switch is opened the foot would convulse a few times at their natural frequency and eventually dissipate all the energy and stop.

Opened up an extra remote and repurposing it for home automation usage. Original power was 3v coin cell but tolerates 3.3v just fine. Seen people run them on 5v as well from Arduinos. Sending it serial commands to "press" the buttons right now, but eventually will be REST calls making it open garage, workshop, and gate.

2

I need help selecting an amp for my new passive speakers. The speakers say the amplifier power should be 10-150 watts. I did some research and an internet guy said you should get 1.5X the wattage for each channel. But he also said to ignore the maximum wattage. So Should I get 15 watts per channel or 225? The speakers have a nominal impedance of 4 ohms, so I think I need to get an amp that does 4 ohms per channel. Here are the specs:

9:30 AM

They're the Audioengine HDP6 https://drop.com/buy/audio-engine-p6-speakers?utm_source=appshare&referer=B2E2PV

Audioengine HDP6 Speakers | Price & Reviews | Drop (formerly Massdrop)

Drop exclusive price and reviews: Audioengine HDP6 Speakers | 250+ Sold | Fusing old-school style with modern technology, the Audioengine HDP6 speakers pair...

Electronics noob here. I'm on the search for a surface mount 330 ohm resistor. Trying to get a project done before the weekend... ends. Any chance there's somewhere I could source one that soon?

5:28 PM

Feel free to @ me with suggestions

What size?

That part I don't think I know.

5:35 PM

Not sure if this helps, but it's going in a Nintendo DS Lite

Mouser has same day will call pickup

11:16 PM

Or maybe next day (depends when u get order in). They are cheap so you could buy 3 or 4 sizes

I was looking at ordering them online.

Yeah I mean could always get an Amazon kit next day delivered.

11:21 PM

But yeah idk other than the drive will call is fun , it's like Amazon same day but for silicon

11:22 PM

Hell get a thru hole, insulate the leads, solder it in and smash that thing inside the enclosure. BAM surface mount

I wound up getting what i needed from a friend.

9:36 AM

Will definitely order some of these though.

I need to drain a 12v car battery down to 10v, any suggestions on how to do that without having to periodically check on it?

Lol uhhh... odd

11:33 PM

There's an electronic load in science that can probably do that. Set a current limit, constant voltage mode for 10v.

the manufacturer wants me to do it to recondition the battery

11:39 PM

it's a deep cycle AGM

Ahh well yeah I'd set up the load for a current limit of like 0.5 or 1C, constant voltage of 10v and let it run.

11:49 PM

I said science. I meant electronics. Big black 4U rack mount unit on the shelves near the personal storage bin. BK Precision something or other.

cool

Yeah that load tester unit is awesome and perfect for something like that

A proper deep cycle charger should have a recondition cycle you can run that should do the same thing

This time the bickering was long enough I actually started a layout. Toying with using some scrap IGBT modules as a load bank.

I have kind of a stupid electronics question: can you buy small pre-made electromagnets? Basically a small piece of ferrous metal wrapped in "magnet wire". I have an idea for something I want to try out, but I might not want to hand wrap LOTS of them myself. I've read about some people trying to use inductors for such a job, but having a hard time telling if that really works. It's also a seemingly hard thing to Google successfully or find on Mouser. Technically this could be called a solenoid I THINK, but most of those results include the moving actuator type piece.

Try searching for "holding magnet"

8:09 AM

Or similar. I see adafruit sells some, and ebay has similar. Depends on what holding force you need

solenoids are going to be optimized for moving the plunger

generally a hollow form with a sprung ferrous mass that pulls the mass into it against the spring with the actuator itself being pulled in or pushed out depending on orientation

@ESmith Ah, "plunger" is a better term. The weird part seems to be TECHNICALLY a solenoid doesn't have to include that plunger but all the practical searches for that word include it. I think I need very little force, but a lot of them. I'm thinking about using them to push away a permanent magnet for a "pen up" operation on a polar bot type plotter (like Brandon's Gocupi back in the day). @Skyspook I'll look around for "holding magnets" and that seems to be a better search term, but the combination of size and prize might scare me off. I don't think need them to be as strong as most offerings etc. and might just have to wind my own (which would be a lot of them if they seem like they'd work).

solenoids are generally used for short linear binary motion applications - power door locks, car starters, appliance safety locks, sprinkler valves - thus the plunger is a natural accessory

10:07 AM

a bit lost on your desire to push a magnet around when a more conventional plunger seems simpler and likely to fit within turnkey solutions out there in the market

10:08 AM

most solenoids that I've seen are of two styles: cylindrical or square. both concentrate the magnetic field inside the housing containing the windings.

10:10 AM

in a previous career I designed some gear that used solenoids for pneumatic valves as well as releasing spring-loaded catches

10:12 AM

rotary actuators are another style I occasionally considered; they spare the designer the need to devise a mechanism to shoehorn a linear solenoid into such an application

10:13 AM

I recall they also applied force more predictably and more consistently through the range of motion

10:13 AM

anyway - I'm babbling

Ideally, I want it to be physically contact free. Most people do the "pen up" with a servo for instance (and a solenoid could also be used here), but that servo "scratches" previous dry erase work while it moves around (even if it has a very small contact point). Would be cool to push it away by ramping up electromagnets (not really levitating, just pushing away from the mostly vertical board) and then bring it back down by ramping electromagnets back down. This also means no power wires running to the stylus (or batteries) for a solenoid/servo. Not sure of the practicality overall, but I want to try an array of these magnets for this job.

if you're not manipulating the pen up/down electrically then how are you doing it?

electromagnets behind the board in theory repulsing a permanent magnet. No idea if it will work etc, but want to try it.

11:38 AM

would in theory cause it to swing away, allow it to move and then come back down

11:39 AM

it's either this or compressed air on the stylus...hehe

??? Magnetic sheet behind the board with one electromagnet on the draw head, or permanent magnet on drawing head and a ton of electromagnets behind the board?

11:47 AM

sounds similar in idea of flip discs that have a tiny electromagnet to swap contrasting sides.

now the need for a great quantity of electromagnets makes sense

Thus is reminding me of a coffee table concept I want to build

12:20 PM

Glass top, and has a dungeon maze diorama inside

@Lampy (Ken Purcell) 2nd one, small permanent on the stylus and an array I can potentially activate groups of magnets behind the board. Very similar to those sorts of displays etc.

Have a 2 axis arm underneath to magnetically move around monster and adventurer mini figs

yeah, I have considered a "mirror stylus" so to speak behind the board I could activate like that

12:22 PM

could hook up to the same motors etc. and therefore be in the same spot

12:23 PM

that's starting to sound better

12:23 PM

makes the whole thing a bit thicker though

12:23 PM

(deeper might be better word here)

12:24 PM

fairly sure I couldn't make a huge electromagnet the size of the entire white board and get the results I want, right?

hm interesting. Take some masonite pegboard, press in some metal sleeves and wind magnet wire around each pin. Wonder if you could weave it like core memory and have it work.

that's a good idea too. Much more scalable than what I was thinking

just the "resolution" is fixed by the pegboard unless you drill your own on smooth masonite

yeah, I think I just need to buy a crapload of "magnet wire" for now

12:52 PM

at least that's cheap

on the unlikely off chance that anybody knows off the top of their heads: in our random piles of SMD tape, are there any 0605 (or within spitting distance of) RGB LEDs?

10:37 AM

A couple of them died out on a project board I have, and I'd rather pay the bin than drive all the way down to Mouser for 2 bucks worth of parts

10:38 AM

1615, if you prefer what some would call non-moonwalker units

Not addressable?

12:02 PM

From my understanding there is not really an organization of the smd reels in electronics. I'm sure if someone volunteered to do that, it would help.

^ no org of most parts. Never saw addressable LEDs when we first got the donation.

is common anode vs common cathode also a thing in that sort of package?

I usually only saw that in the four pin 10mm round packages

1:22 PM

Always bought the wrong version

yes, nonaddressable -- just dumb RGB LEDs, I don't need controllers embedded or otherwise

I'm not sure I've ever seen an 0605 addressable RGB LED!

9:11 PM

And yes, most of those SMD reels have been strewn about the Electronics space since basically the dawn of time

I kinda figured it would just be dumb luck if somebody had bothered to sift through them at some point, likely looking for something else, and happened to have seen them.

1

10:35 PM

Remember, always be filming when you flip the switch.

10:35 PM

I've since fixed the explody bit, this was a one off.

youuuuuuuuuu sunk my battleship?

@michaelb Electroboom re-enactment?

Unintentionally, yeah

8:20 AM

IR surface mount solder flow machine

8:20 AM

All functional except monitor has faded output but readable

8:20 AM

$500

8:20 AM

Has to go this week

oh, man

10:30 PM

is it too late for electronics to petition for more space?

Shut up. You'll start Art harping about moving the personal storage bins again. When THERE ISN'T ANYWHERE TO MOVE THEM. Not that I'm bitter or anything.

1

also as much as that would be cool, its limited use to the space as a whole. like the pick and place machines

indeed

11:13 PM

more if someone personally is interested

11:13 PM

and is willing to run a 60A 208 3ph circuit for it

You shouldn't say that. I meet both those criteria.

7:56 AM

I mean, I bet within a month we could get more people using it than have been certified on and able to use the HAAS over the past year...

9:02 AM

We already have a reflow oven in electronics, not sure why we'd need a second one.

Especially when we have already handled much of the very $$$ electrical work.

We already have a reflow oven in electronics, not sure why we'd need a second one.

@michaelb we do? Where? Is it buried under the mountain of black and yellow bins?

It's an already-modified T962A sitting on top of the workbench next to the wire shelves.

12:24 PM

Comparing an ETS conveyor machine to a T962A is comparing a Haas to (edit) an X-carve (edited)

I mean those are indeed two CNCs

12:31 PM

Purchasing a Haas when you don't even use your X-carve is a pretty big waste of money.

If you have stuff you can do with the X-carve, sure -- but that's not usually how people buy stuff.

12:34 PM

You have a need, so you buy the thing that fits it -- not you buy a thing and hope your need fits it.

12:34 PM

Purchasing an X-carve because you want to mill billet aluminum but can't afford a Haas is a pretty big waste of money.

12:35 PM

The two aren't actually comparable.

You can, if it's the only tool you have, well you might as well try. Having the shiny toys doesn't make you any better at doing something.

12:36 PM

Fact is, we have a reflow oven. It's the right price and size for us. We have no need for a large commercial oven

12:37 PM

Waiting for it to heat up, having to panelize your PCBs so they fit in the conveyor, taking up all that space in an already crowded committee area, which one of these are the benefits that you think the large machine will bring us?

12:39 PM

As for your 'more people will use this than use the Haas' comment, many more requests show up for the Haas on talk. I see many more people using it. Many more people have projects on the Haas.

12:40 PM

There's only a small portion of the space that would even have a project that requires a reflow oven. So much so that people don't even ask if we have one or how to use it.

That's highly unlikely, considering how few people are certified on the HAAS and the fact that it is (supposed to be?) keylocked out. So if you're seeing all that many people using it they probably need to be reported.

2:55 PM

Last I checked the AD list and crossed it with active members, I think I got a result set 2 long.

2:56 PM

Whereas people may not ask about the reflow oven is because many people check the official reference for the tools available in e-lab -- in which the reflow oven isn't listed.

2:57 PM

That list has in recent history (1-2yrs or so) been pretty well kept up, at least compared to other committees. Anything that wasn't on there was usually broken.

2:58 PM

Which, as a matter of fact, was the state of the reflow oven we had there a few years back. I assume the one we're talking about isn't the same one? Or it got fixed, or something?

2:58 PM

I would imagine it's a different one, as the old one was a member's, I think.

Many more than two people are currently trained on the Haas.

2:59 PM

Let me ask you this, how many projects do you know of that required a reflow oven?

Trained and active, is what I checked.

AD does not have the Haas user list

2:59 PM

it never has

2:59 PM

it has those who have taken the classes

2:59 PM

but not those who completed the practical

Require? Few. Could use? Every single PCB project that goes through the E-lab.

the Haas RFID lockout was made before the AD list and integration was setup

2:59 PM

it uses an offline BeagleBone with an internal RFID database

3:00 PM

it's never been transitioned to anything else

well that's just wrong.

It has like four different HAAS groups. And again, HAAS at least used to be keylocked against one of those AD lists.

dude, I'm the admin over AD

3:00 PM

those AD groups aren't the actual operators groups

There was a sync between Beagle one and that.

and I literally was working on its beaglebone the other daty

3:00 PM

no, there isn't

3:00 PM

they're manually added

Barely any pcbs that go through DMS could even use a commercial reflow oven. I doubt many could use the desktop one.

we in fact have a student that can't be added right now because the instructor couldn't SSH into the unit

3:01 PM

since they have to be added manually

Are you positive? When I worked on the Chinese entry system I was pretty sure I was sitting on the code that synced that.

positive

3:01 PM

literally the person that runs the network right now

Fair enough.

sets up our current gen interlocks

I know, Jim. :)

and is a machine shop teacher

3:02 PM

the code for the chinese system pushes stuff from MM to the door controllers internal database

3:02 PM

but the BB isn't on that and doesn't support it with the existing code

I am having trouble imagining a PCB project that couldn't use a reflow oven.

3:02 PM

What, are people allergic to solder paste?

3:03 PM

No, of course not. This was years ago when we were trying to integrate the new system in.

People are allergic to surface mount for one

New back then.

Kit PCBs don't come panelized to fit through a commercial oven. (edited)

I've seen plenty of SMD projects in e-lab.

3:03 PM

You think that hot air tool goes unused?

It's not worth the trouble to run up such a big oven for your one board.

Anything that can use the hot air tool can use the toy reflow oven.

But not the giant one you want.

there's a difference between a hobby scale reflow oven and a conveyor system

3:04 PM

meant for assembly lines

Okay, I'm getting whiplash here. Two arguments at once is enough, I'm not gonna do three. Are you standing by the statement that nobody does nearly anything that could use the reflow oven presently there? Or are you criticizing the desire for the big oven?

It's not going to be any faster if you're doing multiple anyways. You'll still be hand printing paste and hand placing components.

3:06 PM

Alright, let's pick one. We don't need to replace our desktop over a commercial one.

3:06 PM

And go.

We also used to have a small pick-n-place machine in there.

3:07 PM

Oh, that's easy.

3:07 PM

Read back at my "requests" that we pick it up, and "request" that we expand the E-lab space for it, and look at all the laugh emoji by them.

You mean your claim that it'll get more use than the Haas?

3:08 PM

Oh is this going to be one of those 'I won't admit I'm wrong so I'll just play like it was sarcasm' things?

3:08 PM

Let's find out.

And realize when you took something WAY too seriously - and expanded that to a scope where there is a legitimate argument against what you're saying, which is that a reflow oven would nearly never be used.

no one has said a reflow oven would never be used

Did you notice the emoji attached to that claim too? Or are you intentionally being obtuse.

the statement has always been said "conveyor" system

omg more pedant competition

Nearly never? Yes, he did, nearly verbatim.

3:09 PM

And repeatedly.

I know, seems like there's been stiff competition for the big D

3:09 PM

except he didn't

3:09 PM

quote it

3:09 PM

with context

3:10 PM

showing that he wasn't talking about that large commercial conveyor unit

Seriously?

3:10 PM

Sure.

Ahh yes, the good old 'it was just sarcasm dude' defense.

Fact is, we have a reflow oven. It's the right price and size for us. We have no need for a large commercial oven

@michaelb > Let me ask you this, how many projects do you know of that required a reflow oven? @michaelb

3:10 PM

Skipped one

omg nobody cares

There's only a small portion of the space that would even have a project that requires a reflow oven. So much so that people don't even ask if we have one or how to use it.

@michaelb

Fact is, we have a reflow oven. It's the right price and size for us. We have no need for a large commercial oven

@michaelb this for context

If you read what I said, 'We already have a reflow oven, don't know why we'd need a second one' At which point you came at me for trying to compare the two.

1

"a reflow oven" was always used to include the small one.

where is my low orbit ion cannon when i need it

1

Conveyor was specifically used to talk about the big one, yes, as was "the large machine."

3:12 PM

It was always specified.

3:13 PM

If you read what I said, 'We already have a reflow oven, don't know why we'd need a second one' At which point you came at me for trying to compare the two.

@michaelb no, you wrote six more messages after that. I quoted the most relevant ones.

and like we've said, we have no use for the large machine. we've never said we do zero reflow work or it's not useful to have at all

I could quote the entire thing, if you like. Or you could just reread it.

3:13 PM

Of course we don't.

but to say we can justify a large commercial unit is just laughable

Nobody did, Jim.

@michaelb has constantly been refuting how people won't want to panelize their small hobby projects for a conveyor, we have a unit that's the right size for us, etc

I did re-read it, I made that one statement, and then you started talking this crap about Haas vs X-Carve

Christ.

3:14 PM

With a Crocodile Dundee meme.

3:14 PM

CLEARLY SUPER SERIOUS

whatever, I'm done. wants to argue for the sake of arguing because we won't get a stupid piece of machinery that's useless for a makerspace

No, he didn't even mention panelizing until about 15 minutes ago, Jim. What have you been reading?

clearly knows how the other equipment here works, totally doesn't need to listen to us

Ahh, again 'lol dude chill it was only sarcasm!' said after three pages of argument.

lawl the entire argument? I posted the original link

Other than that part I quoted.

and Michael was with me are the warehouse that had it

3:15 PM

literally the start of the discussion

3:16 PM

anyway I'm done; getting close to D levels of pedantry

I mean, I bet within a month we could get more people using it than have been certified on and able to use the HAAS over the past year...

@slinkygn (George) really seems like this all came about because you misunderstood HAAS permissions...

Sorry, lost connectivity for about 60secs there, catching up.

3:16 PM

Really, the grin didn't give anything away?

nope

That was a crack on the fact that we haven't been able to recruit HAAS trainers, which has been a problem for literally years. Which you should know perfectly well, Jim.

3:17 PM

Sorry, that wasn't Jim. Speed reading.

We have 3 or 4 people teaching the Haas right now.

3:17 PM

You really need to chill until you get up to date.

Trust me, the one putting in emoji and Crock Dundee memes didn't need to chill. Then, anyway. Because he wasn't seriously advocating for a tool that would literally take up half of E-lab to be brought in.

3:19 PM

And if anyone unclear on obviously sardonic statements had, say, asked if I was serious instead of presuming a call to war and overstating their case, this would certainly have been avoided.

3:20 PM

Maybe a class on 3d printing paste screens based off kicad plans is what's needed here. Who knows.

3:20 PM

Aka

So why are you so triggered now if it's all a joke?

@yashsedai I think I found your low orbital ion cannon when I found who shot Crocodile Dundee.

*metaphorically; it would not literally take up half the e-lab and yet kept justifying how it would get more use than the haas, clearly showing a lack of understanding on how our tools are used, claiming the haas doesn't have teachers. Like you keep justifying the machine, yet claiming you're just being sarcastic (sorry, couldn't resist chiming back in. really wish I had some popcorn here) (edited)

Sorry, I forgot. It was always a joke now that you've lost the argument.

Seriously, memes and emoji.

3:22 PM

I never justified how it would get more use than the HAAS, even.

I mean, if they were said alone that's one thing.... but you kept pushing it

I just stayed it would.

as a serious argument

*stated

Well neither of us treated it like a joke, so was it really a joke?

3:22 PM

No

onlookers here does this seem like a joke?

My suggestion was a joke. You treated it as not a joke, and in that process said nobody would use a reflow oven. I disagreed.

Calm down nerds

3:23 PM

I see slinky trying to defuse and others berating them

So why are you so triggered now if it's all a joke?

@Deleted User > Sorry, I forgot. It was always a joke now that you've lost the argument. @michaelb You guys have fun deciding whether you want to argue if I currently think it's a joke or it's not.

Everyone just run off to another channel and forget it

Pushing what as a serious argument?

But pearce this is so much more fun!

I'll be happy to drop it once I know what words are being put iny mouth.

3:24 PM

The serious argument would be, the reflow oven would get used.

I think we should have a small reflow oven if we don't already have one

We do, draco, we do.

There's one in there. Still hoping for an answer if it's the 4yo one that isn't listed on the equipment list because it's broken or if it's a new one.

Oh man I've had enough, I gotta get back to work. Peace

That would be part of my serious non-joking discussion that I asked in that text you may have read.

3:27 PM

The actual reflow oven I discussed seriously, because I'd actually use it. (You can tell because, y'know, no laughing emoji or memes of 90s movies.)

we have an oven; @michaelb and I both agree it is the right size for what we need and it doesn't make sense to get a bigger one. Then someone comes along and says we should get it because it's way nicer. Argues that it would get more users than the haas, justifies it like comparing the haas to x-carve, pretends they know how many people actually use the haas, when we keep saying it doesn't make sense to use a commercial sized oven for one board / hobby scales goes into arguments about how the hot air tools get used etc and that's justification, then claims it was all a joke despite not just backing out of the discussion earlier I think that's enough of a tl;dr. thanks for the reminder @michaelb I'm technically still on the clock

3:29 PM

start of the seriousness and not a joke was clearly here:

Comparing an ETS conveyor machine to a T962A is comparing a Haas to (edit) an X-carve

@slinkygn (George)

I can show you the AD search I performed. Not that I think it's relevant. I appreciate your outlining your perception of what happened. Clarifies right up for me when and how much of what was clearly jest you guys took knee-jeel seriously despite big obvious Australian cues otherwise.

3:29 PM

That was LITERALLY POSTED WITH THE MEME

dude, you kept digging your heels in

3:30 PM

random throwing ins of memes in you defending why we need a machine like that doesn't somehow make it a joke

3:30 PM

or sarcasm

I posted that statement with the meme. That was a JOKE.

if you left it at the original lines that would have been one thing, but then you posted that

3:30 PM

and it kept going

You called that the "start of the seriousness"

"slinkygn: Comparing an ETS conveyor machine to a T962A is comparing a Haas to (edit) an X-carve(edited) [12:30 PM] michaelb: I mean those are indeed two CNCs [12:31 PM] michaelb: Purchasing a Haas when you don't even use your X-carve is a pretty big waste of money. [12:33 PM] slinkygn: If you have stuff you can do with the X-carve, sure -- but that's not usually how people buy stuff. [12:34 PM] slinkygn: You have a need, so you buy the thing that fits it -- not you buy a thing and hope your need fits it. [12:34 PM] slinkygn: Purchasing an X-carve because you want to mill billet aluminum but can't afford a Haas is a pretty big waste of money." (edited)

Acknowledging that everything before that was clearly not serious

3:31 PM

So, basically, for you the transition from non-serious to serious, again, included a movie meme and little else.

whatever; I'm muting the channel now (edited)

3:31 PM

it's too distracting

That is the flying off the cuff I'm referring to.

3:31 PM

That's fine. You've clarified what you perceived. I appreciate it.

3:34 PM

And that your thought it started with my line about the HAAS and X-carve vs big and little oven. Instead of the following line - "Purchasing a HAAS when you don't even use your x-carve..." Remember 5m ago when you said nobody had said a reflow oven wouldn't be used, even the small one? As a response to my saying that is what I disagreed with and put forth an argument for?

3:35 PM

Like I said. Thanks for clarifying.

3:35 PM

Next time I'll make sure to not discuss anything while on the phone Discord app.

@slinkygn (George) would you mind editing your profile in this discord to use your given name? Maybe like jim?

1

You can do that per discord server

I certainly can.

1

Just right click it in the server and hit 'change nickname'

4:53 PM

-for the readers wondering

Apologies. Took me a sec. Still on mobile currently.

4:57 PM

Also - just stopped for gas, so fortuitous timing, but I've been out of pocket for a bit before now and will be for a while more once I get in the car. Got another 30min or so to my drive, a stop and another 45min to finish.

Thanks!

This is the toroid transformer I Wana use in a project. Was gonna do a linear bench supply but idk if I really need a linear one for what I will be doing in immediate future. If anyone has a use for it let me know I can let go of it for relatively cheap

11:08 AM

Does anyone here, by chance, own a Wooting keyboard?

8:16 AM

Got an experiment one may want to try if they do; I've just been talking to the keyboard developers and found an oddity with their build they're going to be asking the factory about (edited)

For my battery obsessed friends, you are welcome https://bigbattery.com/

BigBattery.com - Your Source For Power - Renewable Energy Solutions

BigBattery, Inc. is the largest supplier of surplus and re-certified batteries in the United States. We promote mass adoption of renewable energy solutions.

1

complete 24kWH Leaf batteries for $1000 ... even at their nominal 60% capacity that's 14.4Kwh at <$70/Kwh

the idea of big powerbanks and powerwalls fascinate me, but I've never gotten so far as to try to build one

I have yet to need such a solution, but they fascinate me as well. I keep wanting to do an electrical conversion on a car some day too.

wonder if purple lightning is still available

Electric Lemons car

the conversion has already been done ... using early-90s EV kit tech ... so mainly you have don't have to remove the ICE stuff and have a ready-made battery tray to work with

Not sure what voltages that truck ran but I think it'd take a little bit of luck to just plug a leaf battery into it.

OOOOOH. THAT 'purple lightning'

I bet you could buy that cheap enough to make a lemons car...

9:53 AM

Someone ran an S10 at MSR last year

I read 'purple lighting' and was thinking "Erik wants to LED his undercarriage? Grill?"

you would want to redo it - it was a DC conversion without regenerative braking using lead-acid batteries

9:54 AM

could drop in LiFeP04 batteries - at terrific cost - and realize more useful capacity

9:55 AM

but better off to re-engineer it around normal li-ion chemistry and modern motors/controllers

but better off to back away slowly, so as to not garner attention

Saw some guys in lemons race an old electrica 007 with lead acid running it.... the amount of money they spent on batteries and chargers and generators must have been crazy.

9:58 AM

Yes, let's LED Erik's ride. Sounds like fun

but all I want are some lightbars - conspicuous for the Ranger and subtle for the WRX

Yeah, I kind of laughed when I figured out if you really wanted to run a lemons EV you'd almost certainly need to bring your own generator on a trailer to charge the batteries...

racetracks not known for their electrical infrastructure, eh?

Not so much

10:01 AM

But they really want you to race one: https://24hoursoflemons.com/blog/electric-race-car/

Electric Race Car: Win a Lemons Race in Your EV, Get a Million Nick...

No joking about this: If you can win a 24 Hours of Lemons race with your electric race car, you can get a 5.5-ton haul of nickels.

the one time I was dragged out to Eagles' Canyon it seemed like the 'pits' were primarily easy-ups in the parking lot

10:02 AM

a bit harder to procure unreasonable quantities of nickels these days

10:06 AM

if I had unreasonable amounts of time and didn't mind potentially throwing away >$2000 I'd grab one of those early retail BEVs (i.e. Spark) and rehab it as a grocery-getter

could be an interesting group project, but equitable administration/distribution cost and effort would be challenging

That's the definition of a race team

Could you do a battery swap in the pits and keep going?

I was thinking conversion project for something practical as a daily

12:10 PM

@themitch22 likely the only practical way to do endurance racing in an EV

Or a solar "car" and win the least number of laps

12:11 PM

And probably be a danger to everyone on the track

in a Lemons-style multi-class race? Likely.

Yes, that's how they did it. Pretty cool system they had

12:27 PM

Though there were doing it a lot

12:27 PM

Cause... Racing

Newbie here. If I try to build this, am I likely to die? https://mad-science.wonderhowto.com/how-to/turn-microwave-oven-transformer-into-high-amperage-metal-melter-0140772/

How to Turn a Microwave Oven Transformer into a High Amperage Metal...

In this project, you'll learn step by step how to modify a microwave oven transformer into a high-current device that can pump out 800 amps of electrical current, which is enough amperage to melt metal. If you liked the Metal Melter you saw in my previous project, here's how y...

7:48 PM

I'm good at following instructions though

7:49 PM

I need a forge to do blacksmithing and this looks like a cheap way to get something that works...assuming I don't kill myself with it.

7:50 PM

If it's okay to build, I have a follow-up question: can that eye hole there be made bigger so I can insert a bigger metal stock?

Honestly you can get a hellfire forge that uses propane for 150-200

7:58 PM

Using a microwave just seems like a bad idea

That's a lot safer than using it for fractal burning at least

7:59 PM

But an induction heater would be a lot easier to control

Induction is awesome. But can get expensive

@pearce Can I just use a plain old campfire if my wood fire skills are good enough?

8:02 PM

I looked it up and those can get pretty hot

a thorough post-mortem analysis on the exothermic failure of a utility-scale battery storage system : https://www.aps.com/-/media/APS/APSCOM-PDFs/About/Our-Company/Newsroom/McMickenFinalTechnicalReport.ashx?la=en&hash=50335FB5098D9858BFD276C40FA54FCE

11:44 AM

of interest since I've had a hankering to do large powerbanks and DIY powerwalls but pretty much none of the builds I've seen do much to account for the possibility of overheating, thermal runaway, or fire suppression

11:46 AM

cheapest way I can think of to handle such possibilities for the homeowner on a small scale is to simply bury their DIY powerwall and make some arrangements for any overpressure from outgassing or fire to vent to atmosphere

Anyone here been going through the Tanner's donation pile?

7:29 PM

I'm hoping to find some very basic 7-segment mV meters, like 0-50 or 0-100mV, panel mount. They're everywhere on Amazon just figured he mightve had some.

7:29 PM

New laser project (safe ammeters on the front panel). (edited)

Tanner's wasn't known for ... contemporaneous ... inventory

It feels like exactly the type of thing that Tanner's would've had a styrofoam tray of sitting around, but is also likely to have been bought up by someone when closing. Either way, Art picked some up for me at Newark for not too much money.

they also didn't have cool stuff like nixie tubes. I would love to see if any adafruit stuff made it to those bins

Sounds like some inventory needs to be done

Sounds like electronics needs to not sit on piles of parts for years

12:17 PM

Again

There's a rumor that some people are going through it, but I guess they're not on discord. Malcolm would know more.

12:20 PM

That being said, electronics does love to sit on piles and piles and loosely sorted junk

1

I don't mind having useful components around. But you have to actually be able to find them in order for it to be useful...

once upon a time I sorted the 74xx series of DIPs they had, many with legs that still had some solder on them

(edited)

It's something like 3100 gallons of surplus electronics

That's 1.44 cubic centifurlongs.

Sounds like a job for the ROLLAWAY DUMPSTER SERVICE

^^ this I liked the idea of taking donations from them, but they needed to be more discriminatory about what they take in

I can volunteer to go through it. I'm pretty brutal about tossing stuff -- though if it's just me it'll take a while.

I propose that we order a dumpster, take all the bins, throw contents in said dumpster, tell everyone the dumpster will be gone in one week, let the chips fall as they may, one condition, nothing comes back in the building (edited)

Or at least follow up when you say you are going to go through them. I have already thrown away several million parts (SMD/SMT) though. I can come back up there with a crew and wreak havoc!

While we are at it, go over into electronics dept and do the same with all the bs sitting around

@Skyspook I'll help go through it as well. Though I thought Malcolm and Art had a group already doing that.

No clue. I can check in with Art at some point

@malcolmputer care to chime in?

I set up a google doc with the inventory in sheets, set up some basic categories, and Art and I went through about 10% of the inventory as a test to see how the sheet works.

2:42 PM

We took down info such as the following:

2:42 PM

1 Relay 2 NO Relay 30A 208 coil 9 1 Hardware Metric M2, M3, M4 bolts, nuts, washers 15 1 Solenoid Robot Grabber Arm 1 1 Breakers 40A 240V AC/DC 22 1 Tools Magnifying Glass 24 1 Eval Board Video Converter + Cables, VGA S Video Composite 1

2:42 PM

and of course it's sortable etc.

2:43 PM

The plan was once we had inventoried everything we would start deciding how to bundle for sale/giveaway/whatever is legal with DMS and what to keep as a honor system donation style things for DMS elab.

3

dumb question: was there a mechanism for locating items in the room?

Bin number, that's the first row in the above paste.

2:44 PM

We got through bins 1-12 out of ~120.

2:45 PM

All of the bins have a small sharpie marked number on the bin and the bin lid to make sure we don't confuse them by moving them around.

Rock on

@Skyspook I'm sure Art would be happy to have another volunteer to help him with the bins. I set up the sheet, the categories, but let him know that it was back in his court as my work stuff picked back up.

A searchable spreadsheet is ideal.

It is searchable, and more importantly filterable. You could for instance, filter to relays, and then sort high to low by quantity, and if you wanted to filter by AC or DC and then search by max V or A you could.

@malcolmputer link to the Google doc, by chance?

Are the parts from tanners free for all or someone gets first dibs?

Traditionally they have been free to use in projects, not just free to take for your home stock pile. I guess determine DMS's use first, then members use and then enough for free to take.

8:31 AM

That may change depending on how long the take up orange

But electronics has to sort the donation before anyone can go taking stuff

@slinkygn (George) @artg_dms is the owner of the sheet, I think he's only giving it to people who volunteer to sort in the short term at least.

9:33 AM

The electronics are not free, keep your mitts to yourself until @artg_dms says otherwise.

Is there an active effort to sort it? Like days set up or people being recruited? Art didn't say anything at the last committee meeting, he mentioned other stuff like amateur radio and mouser donations

9:39 AM

I guess where I'm concerned is that electronics has a history of hoarding things, and now an entire classroom is tied up with crates of stuff, people are told not to touch, and it seems like the committee is fine just letting it sit there.

You aren't the only one with those concerns. I pinged Art about it this morning.

@slinkygn (George) @artg_dms is the owner of the sheet, I think he's only giving it to people who volunteer to sort in the short term at least.

@malcolmputer I'd volunteer to sort. It'd be more productive than the time I spent sorting the old piles and piles of components. :)

Coworker found a pack of these when cleaning out his desk, I think they would go real well with the rest of the stuff in electronics

1

lol, I used those! Good times

Etch resist stickers for acid etching boards?

12:12 AM

Why not use a marker and hand draw the traces like the good old days.

Lol no, you can put these directly on a PCB but the intention is to lay them down on mylar sheets, which are used as masks to make boards.

More steps. Now we have cad and laser printer transfers

But then it doesn't look like a 3-year-old cut and pasted your circuit together

Have to admit that is pretty cool though

They're like functional modern art

Ooo what happened to that free-form digital clock built with discrete components at Tanners? That was my favorite thing

It was a gift to jimmy

10:01 AM

He and a friend would make wild shit like that and give it to each other

I'd love to do that but with nixie tubes

I have a laptop that has a broken power port, I need to get a final charge into the battery before retirement for it

11:08 AM

This is the battery connection

11:08 AM

Thoughts on charging? The power connection is a type c that doesn't seem to be responding

pardon my ignorance, why does it need a final charge?

11:19 AM

@pearce

files

11:20 AM

But it's also got a busted screen so I wasn't going to invest a bunch more into it

eh

11:20 AM

why not just pull the drive

11:20 AM

and copy the files

11:20 AM

no need for charging

Super thin client

11:21 AM

All surface mount bits

on the hard drive?

11:21 AM

what is the make/model

Razer blade stealth 2016

11:23 AM

But putting a charge into it will let me use it a few more times while I get a new one

aye

11:24 AM

if that doesn't work

11:24 AM

https://www.amazon.com/M-2-External-Converter-Adapter-Enclosure/dp/B076DCNZM3

11:24 AM

https://www.ifixit.com/Guide/Razer+Blade+Stealth+2016+Hard+Drive+Replacement/128080

Razer Blade Stealth 2016 Hard Drive Replacement

This guide will show you a step by step on how to remove the hard drive from Razer Blade Stealth

11:24 AM

looks pretty easy to get out

So it does have an m.2

11:26 AM

Hadn't taken it apart that far

yup

(based on that tutorial) It looks like the hard part will be painting your nails a funky blue and decorating them plus, I wonder of that Gold ring is absolutely necessary? Maybe it's a degaussing device for preventing the super-zap from static discharge? And lord! I'd have to upgrade my wristwatch from nothing to an iWatch... Screw that.

Is your razer blade dead or are you going to replace the battery?

It's not seeing the power connection

12:06 PM

So it can't charge

12:06 PM

Although the battery doesn't register at all on a meter

Is the charger on the main board? Probably not worth replacing.

12:18 PM

The razer blade stealth is a nice laptop though but glad i bought an Alienware, it has been much more user serviceable than I thought.

Power is connected to mobo

I've had good luck with my cheap ASUS

3:11 PM

although I suspect that the power connector will eventually be the lethal flaw

I was eyeballing a small Lenovo

3:31 PM

Needs to fit on my toolbox so I can lug it to repairs

XPS 13?

@pearce, gpd.hk get a micropc

5:39 PM

Its that baby laptop you have seen me record meetings with etc

5:39 PM

It fits in your pocket

I'm planning on a 15" HP Envy x360 for Black Friday, already have the 32GB ram kit to upgrade it

Anyone know if the Tektronix2465 analog scope is working? been trying to use xy mode, and can't seem to get anything

what does the space currently have logic-analyzer wise?

Didn't Raymond just do a class on some we had?

the national instruments fancy thing that connects to the computer

any thoughts on this system: https://simplisafe.com/ - not for DMS< but for a residence

SimpliSafe: Home Security Systems

SimpliSafe Official Site: get the wireless home security system that lets you take control of your safety - in your home, apartment, or business

https://www.youtube.com/watch?v=UlNkQJzw4oA

LockPickingLawyer

[935] SimpliSafe Alarm Bypassed With a $2 Device From Amazon

1

2:12 PM

If you overwhelm the wireless signal, it won't alarm.

technically cutting the fiber at the end of the street is a great burglar idea

lol, true

my house has an old zigbee based system, hasnt been monitored in a decade the batteries have finally died i think

technically cutting the fiber at the end of the street is a great burglar idea

@doug.emes shocked this doesn't happen more often with fiber hubs being easy to find and ... passivee (edited)

We just had a big fiber cut in Addison that took down one of my company's mpls circuits. Course, that was just a gorilla with an auger.

digger fade: decidedly more pronounced than rain fade

anyone know of some hardware on the market that would allow for connectors to be spliced inline on already-run wires?

12:38 PM

I could tolerate taps so long as they trim out neatly, but products like these aren't big enough: https://www.amazon.com/Wire-Connectors-Solderless-Stripping-Connection/dp/B07114RK67

plain old 110v?

2:17 PM

low voltage?

Low voltage DC, couple of amps

5:51 PM

Because I'm nerding out / theory crafting the possibilities of Tesla's 46800 cells

Chart isn't the most self-explanatory, but the peak values for 18650/21700/26650 are distinct high-density/high-current cells, thus the "synthetic C" value is a fiction for the sake of metrics to work against possible 46800 values

6:01 PM

I seriously doubt that a potential high-current version of the form factor is A. Likely B. Going to manage 8.5C discharge, thus I've corrected it to account for the Surface Area : Volume ratio it has relative to 18650

What’s the best one of these “learn electronics” kits? Are they pretty good?

11:43 AM

https://www.amazon.com/Elenco-300-in-One-Electronic-Project-Lab/dp/B00005K86O

Aesthetys

What’s the best one of these “learn electronics” kits? Are they pretty good?

I found a book in the electronics section called “Learn by Discovery”. It gave me a shopping list of components to purchase (all tools can already be found at the Space). It’s filled with little projects to do. You may join me in learning electronics if you’d like.

9V alakline batteries are terrible and have no place in modern electronics

12:46 PM

and by modern I mean made within the last 20 years

But they taste good

Shockingly delicious

tell me how a car battery tastes - only 33% more voltage

They're juicy, but not as delicious.

1:30 PM

Too spicy

well played

Had to play a fun game of 'find a working 9V battery" today

18650's are the new 9v battery

no, the 9v battery is new the 9v battery - low capacity, high self-discharge, low current capability, expensive (edited)

did the bounty from Tanners include any chassis-mount wirewound resistors?

I saw a room with a sign that said “Hackerspace” that said they meet up every third Friday. Is that group active?

Nope, never really were except in theory

not sure anyone is here but I need help with something with micropython and sbus/uart

themitch22

not sure anyone is here but I need help with something with micropython and sbus/uart

Try Bill. You can pm him on talk

PM'd him

9:04 PM

I think he has an email as well

Someone made a gun that shoots ... capacitors https://www.youtube.com/watch?v=iIYlyMv7hRM

Blinky Blink

Capacitor Gun

1

https://talk.dallasmakerspace.org/t/raspberry-pi-pico-sbus-code-help/79375 I can't condense 20 years of computer science experience into a week, so I need help.

Raspberry Pi Pico SBUS Code Help

I am trying to read data from an R/C receiver over SBUS which is an inverted signal to UART. I started with this library which is meant for a pyboard so the micropython implementation doesn’t work the same. With @Evan_Lott help I have been able to get the code translated to run without errors, but no data is received. Without having to use...

I've never even heard of SBUS before

5:00 PM

hmm, doesn't look like it's as simple as UART, it's a parallel bus, not serial

5:00 PM

or maybe not, still reading about it

The SBUS protocol uses an inverted serial logic with a baud rate of 100000, 8 data bits, even parity, and 2 stop bits. The SBUS packet is 25 bytes long consisting of: Byte[0]: SBUS header, 0x0F Byte[1 -22]: 16 servo channels, 11 bits each Byte[23] Bit 7: channel 17 (0x80) Bit 6: channel 18 (0x40) Bit 5: frame lost (0x20) Bit 4: failsafe activated (0x10) Byte[24]: SBUS footer

5:05 PM

Most drone flight controllers use UART but inverts the signals, 0v is low 5v is high I think

5:06 PM

https://youtu.be/IqLUHj7nJhI

Mad's Tech

SBUS RC PROTOCOL HOW IT WORKS - Futaba Vs Frsky Inverted Complete...

5:07 PM

The library as far as I understand, sets up UART with 100,000 baud, I don't know if it assumes the signal is inverted, that's easy enough to do with a transistor but I still don't know how this library works

Given it's using the UART library, and I don't see any inverting of bits going on, I'd say that all of the voltages are going to be non-inverted. There is an invert parameter you can pass to the init function, I believe that should invert the logic for you

5:49 PM

I assume you'd be looking for invert = (UART.INV_RX | UART.INV_TX)

Is that for C or micropython?

5:50 PM

the pico doesn't seem to match the micropython documentation

Sooo the micropython app works. And confirmed with my o-scope that it is a 0v low 3.3v high signal so it should read as UART

Yea, sorry, I eas just reading the micropython docs. So the app works... But the controller isn't responding? Or is it celebration time?

The Pico is running the program correctly (print commands returning values) but the UART data isn't correct

11:10 PM

I think its the pi pico UART implementation that's the issue

11:11 PM

I can try it with an esp32 maybe

Well I had UART wrong. I do need to invert the signal after all.

1:22 AM

Yep that's the difference

1:22 AM

Eureka

1:22 AM

I'll just use the freaking 74S04 and get it over with

3

I saw that post and was wondering if that was something outside an engineering university dorm or something similar. I could've sworn I've seen something like that posted before

Anyone have vacuum tubes?

I found a pack of tubes in e-lab somewhere on those wire shelves

There used to be a bunch, plus small selection of Nixies

i'm not sure if i should post this here or in #computer-committee ... i thought this might be more appropriate as it's more soldering & figuring out what's going on with the hardware side of things ... Louis Rossmann makes a bunch of videos on youtube on how to fix various things & he's been putting a wiki together ... https://repair.wiki/w/Repair_Wiki

Repair Wiki

Right to Repair is the concept that you should be able to choose who repairs the device you own.The goal of the Repair Preservation Group Wiki is to create a repository of information for repairing devices with common problems and solutions.Anyone can post articles on how to repair anything. If you know how to fix something that isn't here, post...

He's awesome. I didn't know about the wiki, so thank you

1:18 AM

#rightToRepair

Or his discord channel!

https://hackaday.com/2021/06/25/a-custom-clock-with-led-filament-hands/

Zach Zeman

A Custom Clock With LED Filament Hands

LEDs have become so ubiquitous in our projects that just hearing that term probably conjures images of tiny illuminated domes in an array of single-spectrum colors. It’s easy to forget that t…

3:08 PM

I found the clock we need to make to the elab

It would be really cool if it actually used discrete component circuitry like the clock in Tanners.

https://www.transistorclock.com/

Utility installed new transformers in my neighborhood and I find the ratings on them confusing - 75KVA and 50KVA. In my mind that's basically 75kW and 50kW respectively, which seems awfully small when the 150A panel in my house can theoretically draw 36kW and each transformer serves something like 5-8 structures.

9:24 AM

Also they're stamped 7200V, which - assuming KVA = kW - for a 50kVA unit would be <7A on the supply side

Rating is in kVA cause of power factors and how the loading works. Could be less or more in wattage than that rating. But also, yes, if everyone were to go to max on everything, you may blow the transformer. Watched it happen once, pretty display...

9:31 AM

This explains it with the math a bit https://www.electricaltechnology.org/2012/02/why-transformer-rating-in-kva-not-in-kw.html/amp

Why Transformer Rated In kVA, Not in KW? - Electrical Technology

Transformer Always Rated In kVA instead of KW. Why Motor rated in kW instead of kVA? Why AC (Air-condition) rating in Ton, not kW or kVA? Why Alternator rated in kVa, not in kW? Why Battery rated in Ah and not in VA? Why Power Plant Capacity Rated in MW and not in MVA?

I assumed it has something to do with the heat load it can handle and less the power delivery

9:35 AM

because it's hard to imagine it being limited to 50kW net delivery

9:42 AM

of course, reality is that big motors - like HVAC compressors - only pull peak startup loads for a second or so and generally don't all start at once after a blackout

Odds are those few houses really are limited to 50kVA continuous. They probably looked at what loads those houses had been using in the past, along with some knowledge of what an average house uses, and decided 50kVA was fine. There's likely some wiggle room for overloads like maybe 1 hour at 55 or 60kVA.

can probably handle brief loads well in excess of that?

Yeah, probably. It's mostly a heat thing, so the thermal mass of the all the steel in the transformer gives it some overload capability.

i.e. anyone on an analog thermostat probably had their HVAC units all restart within a second of power being restored after the replacement was re-energized

I'd be surprised if those types of surges we not a factor in designing the transformer.

just weird that with EV's coming down the pipe they didn't plan ahead

10:53 AM

and possibly in another decade or so heat pumps starting to displace gas furnaces

Hopefully by the time EVs are that prevalent, they can stagger their charge times or something equally clever to reduce peak loading.

Ford is throwing brute force at the problem with the F150 lighting - that's going to be an immense battery pack

10:56 AM

I imagine much of the expense of the re-engineering in my 'hood was the installation of new conduits / conductors between transformers

10:57 AM

if they need to upgrade transformers that's probably a one-day project

"just weird that ... they didn't plan ahead" ROFL

distribution providers supposed to be playing the long game

stop....my sides are splitting!

trains are supposed to run on time and children are supposed to respect their parents

!Askhrew#$,,,sjd#!@

I dunno. whatever happened to actual utilities that made small consistent profits, engaged in actual long-term planning, while providing reliable service?

11:14 AM

oh wait. deregulation since it was more important that someone's brother-in-law makes a fast buck "trading" a resource that's still produced/delivered/consumed the same way as always.

I was going hereish https://www.scientificamerican.com/article/nitrogen-fertilizer-anniversary/

Nitrogen Fertilizer: Agricultural Breakthrough--And Environmental Bane

A new report citing drawbacks of the corn ethanol craze casts a pall over the centennial of a Nobel Prize-winning discovery that transformed global food production

corn ethanol has always had problems

11:42 AM

its failure to produce an acceptable energy ROI was known long before GM made those dumb commercials touting their E85-compatible engines

but hey - E85 might be a rarity now but the corn lobby got their wish and it replaced MTBE as a gasoline additive

is arduino programming remotely possible on CB4?

11:39 PM

I keep getting timeout errors trying to upload my sketch to an esp8266 thing board dev

I was using an AC/DC converter box for my macbook, and running the USB-C cable to my headphones. Cable frayed and died while my headphones were plugged in. Now the headphones won’t charge

12:24 AM

Is this something that can be fixed by replacing 1-2 parts in the charging port / battery?

12:24 AM

Or just the invest in new ones? They’re nice headphones btw

Hello, i got parts for a mpcnc and i need some help putting them together on the controller and stepper motors i have. I just need help makinf sure it connects and functions and i could use any wisedom or advice yall have. Im willing to met up at makers space to test and run it if someone is free this Thursday and friday

10:05 AM

I figure 20$ and a meal to pay for your time would be worth it.

Hey all. Bought a little board intended to be used with a RPi but failed to realize it didn't come with a connector I need. based on Google I think it's a JST SH connector. 10-pin 1mm pitch. described here: https://wiki.geekworm.com/X630-Hardware

7:17 PM

any suggestions on where to get such a connector? I'm finding some stuff but everything is overseas so far

7:22 PM

oh, and I need female jumper wire on the other end for plugging into GPIO

What does this board do?

HDMI input -> CSI. Plugs directly into a Pi. Alternative would be a USB capture device.

Ooh, is that for a Pi KVM?

It could be used for one, I'm sure, but that's not my intent. Trying to use it for live stream setup.

Hey all, I was wondering if anyone is familiar with a way to mass encode NFC tags? I saw a youtube video with a maker type device but didn't know if there was a commercial option available and if there is a software solution as well.

jdozer

Hey all, I was wondering if anyone is familiar with a way to mass encode NFC tags? I saw a youtube video with a maker type device but didn't know if there was a commercial option available and if there is a software solution as well.

How many are you looking at? There are some USB pads that can interact with some software that I've used in the past, but most of them aren't very good - especially if you want like an automatic way to increment IDs or pull from a DB or something.

1:05 PM

(there is one that I'm trying to find the name of again that had a piece of software that was just an API, so you could write your own 'programmer' in the language of choice and easily interact with the actual USB programmer

a couple hundred thousand

Ohboy

lol yea

@Nodoze he's not active in this discord but he can probably give you insight into this.

1

Ion Snowie (D4rk)

(there is one that I'm trying to find the name of again that had a piece of software that was just an API, so you could write your own 'programmer' in the language of choice and easily interact with the actual USB programmer

thank you! yea, i'm working with a programmer now, i'm just trying to give him a head start but also i need to test my setup lol

A few years ago I built a little device that would take a hundred of the little disk NFCs in a stack, and program them one by one, but even with that doing thousands will be painful

1

https://www.youtube.com/watch?v=DQeIvelsM94

GoToTags

Reel-Reel NFC Encoder - Hardware Start/Stop | GoToTags

1:10 PM

i'm basically completely replicating this, but they obviously have their own software

-nodsnodsnods- well if you need a second programmer or anything feel free to ping me, sounds fun and it's been a while since I've worked on any of that stuff

1

assigned Art my proxy for this weekend

https://www.raspberrypi.com/software/operating-systems/

Operating system images – Raspberry Pi

From industries large and small, to the kitchen table tinkerer, to the classroom coder, we make computing accessible and affordable for everybody.

4:42 PM

New OS available

While watching youtube today, I came across a competitor to the TS100 that utilizes a RISC-V instead of STM32 micro in their pen style soldering iron: https://pine64.com/product/pinecil-smart-mini-portable-soldering-iron/ Youtube video (highly favorable review, no comment about if it was for compensation or not) https://www.youtube.com/watch?v=k-wo_al9QJU

PINECIL – Smart Mini Portable Soldering Iron - PINE STORE

A smart and affordable soldering iron running on a RISC-V SoC and featuring an open-source firmware. Portable and powerful, $24.99

Adrian's Digital Basement

How can this soldering iron be so cheap and yet be so good?

That's a nice price point!

I wonder if I can use it for glass while I'm at shows

8:27 PM

https://www.amazon.com/gp/aw/d/B006MQD7M4/ref=psdcmw_3207126011_t3_B00FZPSX3G instead of this one

Hakko Dial type temperature limiting soldering iron FX600

Best suited for soldering of electronic component i.e Soldering of IC/LED and P.W.B.,etc. Superior heat conductivity:T18 series soldering tips feature an redesigned appearance and internal structure that deliver improved heat conductivity. Use these soldering tips to achieve great heat recovery w...

Anyone have suggestions on what I could do with some leftover LiFePO4 cells? After I've built my 48v 16S battery I should have 6 cells leftover if none are DOA. Do I make a 12v 4S? 19V 6S? A 12v 4S and a 6v 2S?? These are 280Ah cells too, so they aren't exactly small

Powerwheels racing series car

9:18 PM

You'd probably never had to charge between races.

9:20 PM

I think they have a battery limit though.

These for your eBike or other backup power? 12v is always useful for something! Although a lot of laptops use 19v wall warts. Infinite laptop time would be useful too!

so a crazy idea I had...

10:06 PM

the cells are 3.2v nominal, which means I could probably run a microcontroller straight off the cell without even really worrying about voltage regulation

10:08 PM

one cell, an ESP32, lorawan radio and a pelican case and now you've got something that could run for probably weeks, being a relay, tracker, whatever and it'll be entirely self contained, no need for solar panels or being placed somewhere with good sunlight.

10:08 PM

now I just need a lorawan project lol

That idea could apply to many things like an ESP32 Cam for a trailcam. For me temp/humidity of a greenhouse or weather station.

Did you build packs with full on BMS? Was thinking a custom car jumper pack would be cool. It could live in the back of the SUV plugged into the remote cigarette lighter and be ready to go for anything. Charge phones & laptops, power lights, etc. The premade ones really suck!

6:27 PM

got some flexible LED filaments

those look cool. I need to play with some

they can get absurdly bright, one strand was pulling 1.4W

7:17 PM

had to limit the current because it was blinding

So much cyberpunk jacket potential

Wild! I had some of the rigid ones but that is soo much cooler!

Those are very neat. Didn't see a lot of vendors, but saw this one: https://www.brickstuff.com/store/p198/flexfilament.html Not too pricey.

300mm Flexible LED Filament in Multiple Colors (5-Pack)-- Brickstuff

Use this flexible 3V DC LED filament with 360-degree light for any DIY project or model. Filaments are sold in packs of five, and require soldering.

we were looking on AliExpress

1:09 PM

theres 1300mm too

1

I keep forgetting to look there... and it also requires I'm patient and don't want near-instant gratification.

I buy aliexpress stuff all the time then forget about the orders

3:27 PM

so randomly I get presents from myself

I do love presents from my past self...

Surprise AliExpress gifts are the best! The 1300mm are not too bad $$$ but limited colors for now, warm white, cool white, red, green, blue. Come on purple!

I can't wait until someone figures out addressable RGB in this format

that would really be a game changer.

These would be cool in even regular RGB

3:04 PM

Is a 0.3v drop pretty normal or should I be using larger than 12awg wires? That's like 6W of loss I think

Bigger is better

3:09 PM

Might want to make sure it's actually 12awg and really copper - lots of fake wiring out there unfortunately

You'll get a more accurate check of drop in the wires by measuring the voltage across the wire itself, in the mV setting. I usually wouldn't trust the last digit of a meter. If 6W is too much loss for you then yeah go bigger but as long the insulation isn't getting soft and you don't smell it you shouldn't have major issues. There's also no harm going bigger.

It's legit wire (GXL), I bought from a trusted source :)

3:10 PM

The wires are just barely warmer than ambient, so I'm not too worried on that front.

3:11 PM

Guess I'll see if I have any lugs that would work with my 8awg GXL and these posts

I'm a big fan of charts like this for wire sizing. https://i0.wp.com/www.theengineblock.com/wp-content/uploads/2018/10/Wiring101.Chart_.Part1_.jpg?resize=633%2C420&ssl=1

3:12 PM

Usually they're set up for a max voltage drop of 5% or something

I went off the bluesea systems chart

3:12 PM

same concept. I don't have a preference just whatever shows up first on google, lol

lol

3:13 PM

Call me crazy but final install when it's a 48v battery will use 2awg wires

3:14 PM

Though I guess that's not terribly crazy for a 5kw inverter

3:15 PM

I've got 00 on hand too

At some point it's a pita to work with.

3:17 PM

Most of the time if we need 2/0 at work, we'll spec a pair of smaller wires in parallel instead.

Thankfully I don't have to run the wires far, since the battery will be right under the inverter

3:23 PM

I should probably do a build log on the forums

3:23 PM

So people can tell me what I'm doing wrong and how it'll burn down my house

There is a ESR meter in the eLab if you want super low resistance readings.

Does your BMS have low voltage cutoff? Given that you are using LiPo I'd assume so but just checking because we nearly burned down a lab because the battery plant didn't have low voltage cutoff. The power supplies are basically constant power output so as the battery voltage drops the input current goes up (toward infinity). The battery plant melted all the insulation off the 2/0 wires we used as the battery voltage dipped toward zero.

7:01 PM

you can also just use a breaker to trip as the battery current approaches the safety limit of your wires.

it's LiFePO4 cells, so they're a good bit safer thankfully, but I am using a pretty nice BMS that covers pretty much everything

7:11 PM

https://overkillsolar.com/product/bms-100a-16s-lifepo4/

overkillsolar

16s BMS 100a LifePo4 Battery Management System for 48v DIY Batterie...

Still waiting for new Inventory… The BMS without wires is in stock but we are waiting for ocean shipping delays on the 8ga wire needed to finish them. Includes a Bluetooth communication modul…

7:12 PM

the charger is a Victron Energy MultiPlus-II, so I have a ton of control of charge/discharge parameters too

7:13 PM

I may end up putting a small microcontoller between them to tell the inverter/charger to stop whenever the BMS calls for it, so I don't have to rely on just the mosfets of the BMS (it can disable charge and discharge independently)

7:14 PM

I'm debating between a DC breaker and a fuse right now

7:14 PM

as the final failsafe

7:15 PM

https://github.com/FurTrader/Overkill-Solar-BMS-Arduino-Library

GitHub - FurTrader/Overkill-Solar-BMS-Arduino-Library: Just the Ard...

Just the Arduino Library for Overkill Solar BMSs. Contribute to FurTrader/Overkill-Solar-BMS-Arduino-Library development by creating an account on GitHub.

7:16 PM

there's even an arduino library for this BMS, which is nice

1

3

1

11:35 AM

When you want to feel like you’re at Dms but stuck at home

Has anyone seen any USB to TTL converters around ELab? Preferably one that supports 3.3v RX/TX?

Ah, there are two FTDI cables on the same drawer as the Flukes.

anyone ever troubleshoot a USB battery bank + AC inverter?

no but i once charged a dead car battery by uisng a float charger plugged into an inverter plugged into a car.... there were no jumper cables

Do I need to be trained to use the desoldering tools, or is the instruction manual and YouTube ok?

No training required your plan to look up the information should have you covered.

Thank you!

Not sure where the solder gun is but it normally lives in the bottom drawer of the black toolbox.

Saw this on Talk, so I’ll just need to look once I get up there

Interesting idea to essentially unroll a stepper motor into a flat pcb https://youtu.be/uL6e3co4Qqc

SRI International

Magnetically Actuated Micro-Robots for Advanced Manipulation Applic...

1

another interesting vid https://www.youtube.com/watch?v=xPUEOhMBpUw

Miniatur Wunderland

Gerrit's Tagebuch #80 - Schwebende Autos: Hightech in Monaco

https://www.facebook.com/groups/259905524039336?multi_permalinks=5371956299500874

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See posts, photos and more on Facebook.

11:48 AM

Got my flipper zero! Time to do some wireless hacking

11:48 AM

https://flipperzero.one/

Flipper Zero — Portable Multi-tool Device for Geeks

Based on ultra low power STM32 MCU for daily exploration of access control systems and radio protocols. Open source and customizable

Andrew LeCody

Got my flipper zero! Time to do some wireless hacking

That looks seriously cool. Any interest in doing an informal demo/experiment session at the Space?

sure!

6:23 PM

I wonder if anyone else bought one

I was on the fence and ultimately didn't since I'd been burned by too many projects that didn't deliver

1

10:47 PM

Can't wait to see how they do

How unrealistic would it be for a complete beginner like myself to attempt to reflow and test repairing my dead graphics card? Like, it sounds like something that is way over my head, but they're absurdly pricy right now... Or is it something where, if it dies of "old age," it's just beyond repair? (edited)

11:08 AM

Like I'd have no idea where to begin, how to test and find the fault on a bench without going back and forth with my computer, I know how to solder things ofc... Or does it have a microchip on it, that would make things kinda impossible if that was the part causing the issue lol (edited)

11:10 AM

On the surface it seems like something really impractical but, I thought what the heck, maybe it's actually not and I just wouldn't have the experience to know if it's not impractical

Timooni

How unrealistic would it be for a complete beginner like myself to attempt to reflow and test repairing my dead graphics card? Like, it sounds like something that is way over my head, but they're absurdly pricy right now... Or is it something where, if it dies of "old age," it's just beyond repair? (edited)

If you don't know what's wrong... It's fairly impractical. There are so many components that could be wrong with it I thought it would be really really difficult to just kind of check everything. If you have an idea on what the issue might be, or if you're aware of some well-known problems like capacitors failing or something.... Those might be easier to actually fix yourself. But unless you have like schematics and a lot of resources... And also have a working board preferably... And better yet a actual PCIe test station or something.... It would be difficult

Who’s up for a field trip. https://texashillcountry.com/mysterious-tesla-tower-texas/amp/

engpin

Who’s up for a field trip. https://texashillcountry.com/mysterious-tesla-tower-texas/amp/

I drive by this on the way to some family property. Milford is a nice little town. I don't know if they still host it but they had a nice Salsa and Sangria festival to find their park

4:37 PM

I think I figured out why this sensor stopped reporting lol

I'm at the space for a bit with my flipper zero if anyone wants to play with it

1

5:43 PM

Totally worked for cloning my RFID

going to be at DMS this evening if anyone wants to check out the Flipper Zero

https://www.youtube.com/watch?v=vGjQcPUfBdM

Adafruit Industries

Chip Shortage (a new feature) #ChipShortage #adafruit @Adafruit

12:30 AM

highlights items that are in short supply or impossible to find

Flipper Zeros are available for pre-order again: https://shop.flipperzero.one/ (edited)

Flipper Zero Shop

Flipper Zero is a versatile multi-tool, based on ultra low power STM32 MCU for daily exploring of access control systems and radio protocols. Fully open source and customisable.

1

Out of stock again

Hot product!

I want Pi, more Pi please!

Right??

10:03 AM

I think they're saying 2023 for Pi to start shipping to US again, hope that was wrong

Scalpers will be sniping them until at least then!

Yeah

10:06 AM

I'm still hunting for a Pi Zero W 2 for a friend

RP2040's are still available, Pi Pico

11:39 AM

not a linux computer but dual-core ARM microcontroller

Limey (MReynolds)

Yeah

How bad ya need it buddy

doug.emes

How bad ya need it buddy

Why does that sound like a "make an offer"? LOL Its not urgent, I run an octoprint server with it on my ender, and my friend who has same printer wants the same set up

I mean, I may have one setup like that right now, in a case, with a picam. I could be convinced with a favor. Muahahahababa

1

Andrew LeCody

Flipper Zeros are available for pre-order again: https://shop.flipperzero.one/ (edited)

Still waiting to get mine. Already got a pwnie pi, badusb (Bluetooth version) and some otg meshtastic nodes. After setting up the v3 rtlsdr I'll drop the coin for two or more flippers.

They just shipped out another round of orders, so hopefully you'll get it soon

1

Do we have anything in the space for writing RFID chips, workign on a programming project and dont wanna sped $50 on one...

Lots of rfid technology which frequently and encoding

We had a 125khz tag cloner I believe

4:00 PM

You could program the rfid implants for hid prox and other protocols

We have a tag cloner/programmer in the Networking Closet, North, for use with members badges, tokens and implants.

jphelps

We have a tag cloner/programmer in the Networking Closet, North, for use with members badges, tokens and implants.

Unless it was replaced with something not the cheap Chinese units (the small white, self-contained one) those are dangerous for implants; it sets the write password on t5577 chips

10:23 PM

Which if you don't get a copy of the password from the unit, which is not always the same, you've effectively set the tag to be read only with whatever was there

https://www.raspberrypi.com/news/raspberry-pi-pico-w-your-6-iot-platform/

Raspberry Pi Pico W: your $6 IoT platform - Raspberry Pi

Today, we’re launching three new members of the Raspberry Pi Pico family: Raspberry Pi Pico W ($6), Pico H ($5) and Pico WH ($7).

2

1

doug.emes

https://www.raspberrypi.com/news/raspberry-pi-pico-w-your-6-iot-platform/

I stumbled across the data sheet earlier this week and wanted one so bad... any source(s) have them in stock locally yet?

Microcenter might have some tomorrow if you're fast enough

1:52 PM

So who got lucky? I slept in

doug.emes

So who got lucky? I slept in

Not I. Checked around 9:30 and they showed as "sold out"

The guy at Microcenter this morning said they sold out of 76 units in five minutes.

1

Sheesh

fkn low-end consumer electronics designers - why use one 2032 cell when you could use two 2016s with 75% of the energy density and maybe parity on power capability ... accounting for twice the voltage?

Supply 2 batteries when they could supply just one? Crazy talk Eric lol

or in some cases supply one battery and make it a whole 1.6mm thicker

Most of the time I thought they stacked two cr2016 to get 6v instead of 3v, no need for a boost circuit.

indeed, however this is an irritation to the user since 2016s effectively cost the same as 2032s. and I've had at least one device that claimed to use 2x2016 or 1x2032 that did not function with the latter.

1

https://www.hackster.io/news/this-resistor-lamp-mirrors-the-color-codes-of-tested-resistors-9395d60f679b

This Resistor Lamp Mirrors the Color Codes of Tested Resistors

To make resistor color codes easier to see, J built this awesome resistor lamp that mirrors the color code of any tested resistor.

2

1

Hello all, I have a question. I’m a novice when it comes to electronic, but I’m about to tackle making an led sign. I’ll be wiring in several different LED strips, I’m trying to determine is there an advantage/ disadvanted to wirining them in parallel vs serial? If I can, I’d like to avoid having to solder both sides of the LED. Any advice would help me a lot. Thank you

The determination on wether to use serial, parallel or serial/parallel is what is the source voltage you want to drive your LED sign from. The forward voltage drop of most high efficiency LEDs is 2.2 volts. So if your using 12 volts (actually 13.8V) from a car, so it is pretty simple to put 5-6 LEDs in series. Here is a pretty good guide http://dangerousprototypes.com/docs/Basic_Light_Emitting_Diode_guide

1

Mandar L

used /Whois

ish#0402

Created 4/13/2021 9:17 PM Joined 11/9/2022 11:35 PM

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ish

Hello all, I have a question. I’m a novice when it comes to electronic, but I’m about to tackle making an led sign. I’ll be wiring in several different LED strips, I’m trying to determine is there an advantage/ disadvanted to wirining them in parallel vs serial? If I can, I’d like to avoid having to solder both sides of the LED. Any advice would help me a lot. Thank you

(you said LED sign, so I'm assuming individual control... if they are all the same color this may not apply)... For individually addressable LED strips the power is normally paralleled. Stable power is important. Small installations can have a single power connection but for anything larger I normally splice in power every few feet to keep it robust. Control signals go into 1 end of each strip of lights... and can come out the other end to daisy chain to the next strip (or you can start a new chain from your controller if that's easier)

2

Thank you all so much for responding. The source of my voltage will be the wall outlet. I’ll end up with 20 individual LED strips.

Are they individually addressable LEDs or just single color strips?

ish

Thank you all so much for responding. The source of my voltage will be the wall outlet. I’ll end up with 20 individual LED strips.

if youd like to meet up at the space and go over the LED goals, i could offer more suggestions. im available most evenings but will be out of town Fri-Sun this week

TJSmith

if youd like to meet up at the space and go over the LED goals, i could offer more suggestions. im available most evenings but will be out of town Fri-Sun this week

Tj thanks for the response. I didn’t realize that I missed it. I would definitely like to meet up. I’d appreciate that so much. I was planning to go this evening and tomorrow evening if you’d be free. I just want to make sure I’ve got the right idea with this project.

ish

Tj thanks for the response. I didn’t realize that I missed it. I would definitely like to meet up. I’d appreciate that so much. I was planning to go this evening and tomorrow evening if you’d be free. I just want to make sure I’ve got the right idea with this project.

i'll be at the space tonight for the 7pm board meeting, would be happy to meet up before or after. I'll keep an eye out to meet up and I'll have my laptop and discord open

ish

Tj thanks for the response. I didn’t realize that I missed it. I would definitely like to meet up. I’d appreciate that so much. I was planning to go this evening and tomorrow evening if you’d be free. I just want to make sure I’ve got the right idea with this project.

BoD meeting is over, I'll be near the arcade helping with setup and such... Wearing a blue hoodie. Cheers

random, but anyone remember the long shelf life cells that Radio Shack sold in the late 80s-early 90s timeframe that one had to twist to activate? (edited)

2:32 PM

about the size of a D cell in a plastic housing

Like these? https://spwindustrial.com/48-d-cell-code-red-emergency-20year-life-twist-top-activated-1-5v-battery-new/

48 - D-Cell Code Red Emergency 20Year Life Twist Top Activated 1.5V...

2

that's wild. does it connect terminals when twisted? or is this some kind of glow stick magic

It's a chem mix IIRC. They also were a little under voltage. Modern pre activated chems can have a shelf like of 15 years if you get the industrial and critical load versions.

12:13 AM

I think Procell is 10 years (though have to source carefully now it seems, last Amazon batch were ripoffs. I last got some from Metroplex Battery) (edited)

Mandar L

Like these? https://spwindustrial.com/48-d-cell-code-red-emergency-20year-life-twist-top-activated-1-5v-battery-new/

Thanks. That's what I was remembering.

9:11 AM

and ... dang ... that's expensive

some fragmented speculative info here https://www.candlepowerforums.com/threads/un-activated-d-cells.205925/

Help, how do I get the projector in the Lecture hall working?

Hey, I'm Roy, new to the space!

I've visited once and was amazed, planning to sign up soon! I have a Gaggia Classic Pro that I want to install a PID mod for, and ideally play with Gagguino. My electronics skills are a bit rusty, I'd love some help in exchange for helping in any software / cybersecurity projects you may have! If anyone is up for that, I'm planning to come to the space during the weekend (Fri / Sat) and bring everything, so let me know if you feel like joining