#diy_electronics — Public Fediverse posts

I am currently editing my video series about bristle bots. I am really happy to see how easy it is to tune them the way you want.

#stem #stemeducation #mint #robotics #fediLZ #diy_electronics #diy #cardboardrobot #kids #makerspace

Readings from my DIY air quality monitor yesterday and today showing a spike in volatile compounds as soon as I leave the laundry to dry

This is with >95% organic cleaning products

I’m kinda worried by how much I inhaled before I started using organic products and when I was in a tiny space

IAQ (purple), temperature (red), humidity (blue) and atmospheric pressure (gray) are on the left scale; VOC (green) and eCO2 (yellow) are on the scale on the right

VOC, eCO2 and IAQ all represent the same readings from my sensor, which is a resistance when certain compounds are detected in the air

At 8:20 PM yesterday and at 3:45 PM today, I left my laundry to dry in the room below on the graphs; there was some leakage to the adjoining office room

For reference, this is how I built the project:
https://infosec.exchange/@GuillaumeRossolini/113092226187348913

#AirQuality #Diy_Electronics

My DIY air quality monitor system has been out of commission for a while and I couldn’t be bothered to investigate it

But

I did this weekend, though, and I think I fixed a few issues too

The raspberry pi zero in charge of storing the readings was struggling, apparently kernel panic

So I reinstalled the flash entirely from a recent image, added my tools and my app, all of which took an hour

Everything is back and I iterated a few times on the microcontroller app, and it hasn’t been smooth but it’s been better than last year

Issues as far as I could see were:

• too many WiFi thingies close together in a small room => RF interference
• the bridge node was spending too much time not reaching storage over HTTP => not getting mesh sync => nodes disconnected

So I spaced them out and I added a timed reset

Let’s see how long this lasts!

#rpizero #iot #diy_electronics #arduino #esp32 #esp8266 #sqlite #mesh #DiyAirQualityMonitor

My DIY air quality monitor system has been out of commission for a while and I couldn’t be bothered to investigate it

But

I did this weekend, though, and I think I fixed a few issues too

The raspberry pi zero in charge of storing the readings was struggling, apparently kernel panic

So I reinstalled the flash entirely from a recent image, added my tools and my app, all of which took an hour

Everything is back and I iterated a few times on the microcontroller app, and it hasn’t been smooth but it’s been better than last year

Issues as far as I could see were:

• too many WiFi thingies close together in a small room => RF interference
• the bridge node was spending too much time not reaching storage over HTTP => not getting mesh sync => nodes disconnected

So I spaced them out and I added a timed reset

Let’s see how long this lasts!

#rpizero #iot #diy_electronics #arduino #esp32 #esp8266 #sqlite #mesh #DiyAirQualityMonitor

My DIY air quality monitor system has been out of commission for a while and I couldn’t be bothered to investigate it

But

I did this weekend, though, and I think I fixed a few issues too

The raspberry pi zero in charge of storing the readings was struggling, apparently kernel panic

So I reinstalled the flash entirely from a recent image, added my tools and my app, all of which took an hour

Everything is back and I iterated a few times on the microcontroller app, and it hasn’t been smooth but it’s been better than last year

Issues as far as I could see were:

• too many WiFi thingies close together in a small room => RF interference
• the bridge node was spending too much time not reaching storage over HTTP => not getting mesh sync => nodes disconnected

So I spaced them out and I added a timed reset

Let’s see how long this lasts!

#rpizero #iot #diy_electronics #arduino #esp32 #esp8266 #sqlite #mesh #DiyAirQualityMonitor

My DIY air quality monitor system has been out of commission for a while and I couldn’t be bothered to investigate it

But

I did this weekend, though, and I think I fixed a few issues too

The raspberry pi zero in charge of storing the readings was struggling, apparently kernel panic

So I reinstalled the flash entirely from a recent image, added my tools and my app, all of which took an hour

Everything is back and I iterated a few times on the microcontroller app, and it hasn’t been smooth but it’s been better than last year

Issues as far as I could see were:

• too many WiFi thingies close together in a small room => RF interference
• the bridge node was spending too much time not reaching storage over HTTP => not getting mesh sync => nodes disconnected

So I spaced them out and I added a timed reset

Let’s see how long this lasts!

#rpizero #iot #diy_electronics #arduino #esp32 #esp8266 #sqlite #mesh #DiyAirQualityMonitor

My DIY air quality monitor system has been out of commission for a while and I couldn’t be bothered to investigate it

But

I did this weekend, though, and I think I fixed a few issues too

The raspberry pi zero in charge of storing the readings was struggling, apparently kernel panic

So I reinstalled the flash entirely from a recent image, added my tools and my app, all of which took an hour

Everything is back and I iterated a few times on the microcontroller app, and it hasn’t been smooth but it’s been better than last year

Issues as far as I could see were:

• too many WiFi thingies close together in a small room => RF interference
• the bridge node was spending too much time not reaching storage over HTTP => not getting mesh sync => nodes disconnected

So I spaced them out and I added a timed reset

Let’s see how long this lasts!

#rpizero #iot #diy_electronics #arduino #esp32 #esp8266 #sqlite #mesh #DiyAirQualityMonitor

RE: https://infosec.exchange/@GuillaumeRossolini/113889150074324864

I wish I knew how to get back to this state 😅

I have everything in git, so there is a history of the code changes but I never committed the list of dependencies and their version…

I documented all that after this point

#IoT #diy_electronics #mesh

Bought another screen and I'm waiting for it to arrive. AAAANNNNDDD It won't fit either. Why do I keep buying these displays with PCBs on the back?! The display itself fits, but the PCB messes everything up.

Wellp. Another week of mourning having to buy another one. Although I'm having fun with this project, I really need to earn more money. :)

(Maybe I can separate the display from the board...? I'd need to buy a connector...but they are cheaper... Humm...)

#diy_electronics #diy #handheld

Some more workshop work on the SDG2042X Linux GUI today (got a free Monday): Fixed 5 bugs in this round, including ARB handling on the real instrument, sweep fallback timing, preset handling, and one unsafe input-parsing corner.

I hope GUI is getting a bit less fragile / more reliable.

Blog:
https://togo-lab.io/?p=287

Gitea:
https://gitea.togo-lab.io/tgohle/0003-SDG2042X-PyQt-GUI-for-Linux

#ToGoLab #Siglent #SDG2042X #PyQt5 #Testbench #OpenSource #python #weekendProject #diy_electronics #DIY

Some more workshop work on the SDG2042X Linux GUI today (got a free Monday): Fixed 5 bugs in this round, including ARB handling on the real instrument, sweep fallback timing, preset handling, and one unsafe input-parsing corner.

I hope GUI is getting a bit less fragile / more reliable.

Blog:
https://togo-lab.io/?p=287

Gitea:
https://gitea.togo-lab.io/tgohle/0003-SDG2042X-PyQt-GUI-for-Linux

#ToGoLab #Siglent #SDG2042X #PyQt5 #Testbench #OpenSource #python #weekendProject #diy_electronics #DIY

SILKSONG!
(steam link + retropie! xD)
#raspberryPiZero #retropi #diy_electronics

SILKSONG!
(steam link + retropie! xD)
#raspberryPiZero #retropi #diy_electronics

SILKSONG!
(steam link + retropie! xD)
#raspberryPiZero #retropi #diy_electronics

SILKSONG!
(steam link + retropie! xD)
#raspberryPiZero #retropi #diy_electronics

Reading literally any tech forum with no knowledge.

"Well you gotta twist the carbunkle in the skittle-trunk. Then when you've built the picklebum using the cubadune it'll all just work!"

#diy_electronics #linux #maker #OpenSource

Currently filming a tutorial for my light-sensing DIY bristle bots aka mothbots. I got a bit carried away with all the different designs ;)

#stem #stemeducation #arteducation #makereducation #diy_electronics #DiYRobot

Currently filming a tutorial for my light-sensing DIY bristle bots aka mothbots. I got a bit carried away with all the different designs ;)

#stem #stemeducation #arteducation #makereducation #diy_electronics #DiYRobot

Currently filming a tutorial for my light-sensing DIY bristle bots aka mothbots. I got a bit carried away with all the different designs ;)

#stem #stemeducation #arteducation #makereducation #diy_electronics #DiYRobot

Currently filming a tutorial for my light-sensing DIY bristle bots aka mothbots. I got a bit carried away with all the different designs ;)

#stem #stemeducation #arteducation #makereducation #diy_electronics #DiYRobot

Currently filming a tutorial for my light-sensing DIY bristle bots aka mothbots. I got a bit carried away with all the different designs ;)

#stem #stemeducation #arteducation #makereducation #diy_electronics #DiYRobot

For the next batch of earrings, I plan on adding a bunch more pride flags to the earrings. Any suggestions? I already have the rainbow flag and the trans flag.

Note that because these are LEDs, the colors black and gray are difficult to represent so for example the ace flag sadly won't work well.

#diy_electronics #lgbtq #jewelry

So I have a few steps/options for building the Idun Cartridge..

1. Have a crash course in electronics building AND/OR
2. Have a crash refresher in reading a schematics AND
3. Have a crash refresher in reading the bands on resistors / identifying resistors AND/OR
4. hoping the blurry pictures of assembled units online are fit to get the gist (for 1 - 3)
5. Setting up a Discord account and barfing all the way.

I'd really assumed there'd be a bit more to go on (like build instructions).

If anyone here knows of any online guides, or has done it before and can give a noob the 101 level intro, I'd appreciate it greatly.

#c64 #iduncartridge #diy_electronics #pcbassembly

Oops. I forgot to set the battery pack for weekend running. Now it gets to recharge.

It finally hit 3 cycles, after 23 days and change. Used as I am, this pack should be good for 7500-15000 cycles. It takes more than a week for a cycle at this pace. Ergo, this pack (not taking into account utility company power failures, leading to longer times running off of batteries), should last somewhere between 150 and 300 years, assuming the batteries don't need hip replacements by then.

#DIY #DIY_electronics #BatteryPower

LED earrings are back in stock! It took a bit longer than expected due to Lunar New Year, but I finally received the PCBs today.

https://lectronz.com/products/erring-ring-rgb36

Because I'm doing this as a company now, there are a few changes:
* VAT is charged in the EU.
* Shipping costs are much lower.
* More payment methods are accepted, including a few local ones.
* Shipping to the US got re-enabled, with added tariff and handling fees paid during checkout.

#jewelry #diy_electronics #DIY

Heute dann der zweite Tag #Jugendforscht #Lötworkshop in der #fau Nürnberg. Es waren echt tolle Menschen und tolle Betreuer 😍. Mega viele Ideen was man noch zum Leuchten bringen könnte!

#lötenverbindet #soldering #diy_electronics

I cut the charging amps down to 10 on the big UPS. All is calm and peaceful. Quiet, even. It has all night to recharge. No need to rush things.

#DIY #DIY_electronics

Today I used my custom IoT build to scan the air quality at the office and on the commute back

Turns out both locations seem to have better ventilation and air filtering than I would have thought, but I’d need to scan for longer periods of time to be sure

The train did have a buildup up until we started moving, which makes sense given what I know of their systems being mostly useless until the train leaves the station

I’ll probably need to think of a battery and data storage system to simplify scanning on the go like this, but I’m already satisfied that my little thing could be used so easily in this way

I just booted up a random laptop, plugged the USB and ran a serial console client (in this case PuTTY); no code changes at all, the same code and config that I use at home in a mesh

#AirQuality #diy_electronics #NoCloud

I wondered if I was overdoing it with the hours I'm using the big DIY UPS battery pack, so I went to solar sites to see what they think best practices are for LiFePo4 batteries.

According to everything I read, these are designed for 7500 cycles, but those cycles are deep cycles. I'm only using 20%-25% daily, before recharging. Taking into account holidays and weekends, when I won't be using it, the pack should be good for roughly 60 years. My heirs can enjoy some savings, lol.

If we ever get off-grid solar approved so I can hang panels on my deck, woo-hoo! In the meantime, I'm saving a bit during PGE's daytime and expensive early-evening rates on their TOD plan.

#DIY #DIY_electronics

I built a thing fedi people 🤗🎉

#Electricians please look away, no wiring crimes habe been comitted here.

#diy_electronics #diy

It looks like he has done all of the work. He needs someone to etch, and I assume stuff, some boards. I don't have access to the equipment. If you do, here's a worthwhile project! Teachers, here is a ready-made etching project for your students to work on (with potential revisions)!

https://oldbytes.space/@tschak/116059909868896243

#computers #Apple #etching #Atari #PC #DIY #DIY_electronics

„Microwave Oven Failure: Spontaneously turned on… by its LED display“

https://blog.stuffedcow.net/2024/06/microwave-failure-spontaneously-turns-on/

„Due to aging of the display’s LEDs, there is enough reverse-biased leakage through the LEDs to cause the door switch to be incorrectly sensed as open, causing the microcontroller to incorrectly think the door was open.“ #righttorepair #diy_electronics

I plugged 3 PCs, a laptop, a stereo, a preamp, and 2 monitors into the backup battery system. I set the inverter, which is in UPS mode, to switch to battery power at 7 am. It just switched to use line current at 10 pm. During those 15 hours, with the Mastodon/Peer Tube/Faircamp server doing its thing, and me in the Unreal Engine editor (until I crashed it), in Logic Pro doing the usual, using my browser, and eventually running a Steam turn-based game, I used 25% of the pack's capacity.

Based on last night's test, I think it will take 3 hours to recharge the pack.

If the server is down during a power failure, either I am the cause of the power failure, and am smoldering, or it is because Ziply is reliant on the grid, and isn't delivering backup power to its remote switches (though it is likely their data center(s) has/have backup power and remain(s) up). Isn't English great?

#DIY #DIY_electronics

3 PCs ran off batteries for 5 hours. One was running the Unreal Engine editor, where I built texture streaming and ran the game. One is the server. One is idling. They used 8% of the battery pack.

It would appear that I could run all 3 on batteries from 7 am until 9 pm and use under 24%.

If I swapped the laptop for the idling PC, it probably would be 24% from Logic Pro. I may do this. It's well under 50% usage. This will allow almost all of the PC power to be consumed during the least expensive hours, when the batteries recharge. Heck, I might get away with leaving the idling PC on. It is supposed to be NAS, if I ever get my act together.

#DIY #DIY_electronics

While loading the game, it dropped to a little over 4A. Once it got running, it's using 6.5-7.5A.

#UE5 #DIY_electronics

Today is a test of 3 PCs running for 4 hours solely off of batteries, to see how much it drains the battery pack. I'm hopeful that I can start it at 7 am, finish at 5 [Edit: Oops 9] pm, then charge overnight. Yesterday's test suggests it will work, but I used a much lighter load for part of it.

I should bring up the Unreal Engine editor. That will be a decent load, lol.

#DIY_electronics #UPS

I'm not sure why it triggered 20 minutes late, but the inverter switched to battery power. The PC and light on that circuit had no glitch.

Woo, and may I say, hoo!

I'll want to understand why it did that, but it switched. (I heard it click - that must be a solenoid. No, I haven't taken the inverter apart.)

Progress!!

This should give me a baseline for how much the batteries drain with modest loads. I have had the PC running htop.

#DIY_electronics

Okay. If I set everything correctly (ha!), in a half hour the inverter should swap sources from line to battery. That's a timer setting, as is the charge time setting.

Fingers proverbially crossed, I await the first attempt to do what I want this thing to do.

#DIY_electronics

Assuming I haven't screwed something up, I set the inverter to run off of the battery pack from 5 pm to 9 pm, and to begin charging immediately after that, to continue until 7 am. We'll see what it actually does.

Dare I connect the server up before testing this? Oh, heck no. I'll test with an old PC and a floor lamp.

#DIY_electronics

Version 2 of the #eurorack overdrive module:

- Placed filtering caps closer to op amp.
- Schottkey diodes to protect against reverse polarity.
- Tip normal of input jack connected to ground to avoid noise/hum/interference when nothing is plugged in.
- Unity gain for unused op amp.
- More compact design.

I'm running out of ideas for what to improve. The next version will have drive, tone, and volume controls. #synthdiy #diy_electronics #electronicsDIY

Version 2 of the #eurorack overdrive module:

- Placed filtering caps closer to op amp.
- Schottkey diodes to protect against reverse polarity.
- Tip normal of input jack connected to ground to avoid noise/hum/interference when nothing is plugged in.
- Unity gain for unused op amp.
- More compact design.

I'm running out of ideas for what to improve. The next version will have drive, tone, and volume controls. #synthdiy #diy_electronics #electronicsDIY

Version 2 of the #eurorack overdrive module:

- Placed filtering caps closer to op amp.
- Schottkey diodes to protect against reverse polarity.
- Tip normal of input jack connected to ground to avoid noise/hum/interference when nothing is plugged in.
- Unity gain for unused op amp.
- More compact design.

I'm running out of ideas for what to improve. The next version will have drive, tone, and volume controls. #synthdiy #diy_electronics #electronicsDIY

Version 2 of the #eurorack overdrive module:

- Placed filtering caps closer to op amp.
- Schottkey diodes to protect against reverse polarity.
- Tip normal of input jack connected to ground to avoid noise/hum/interference when nothing is plugged in.
- Unity gain for unused op amp.
- More compact design.

I'm running out of ideas for what to improve. The next version will have drive, tone, and volume controls. #synthdiy #diy_electronics #electronicsDIY

My earrings are back in stock! Just need to put them together. You may have seen them at #39C3, but I quickly ran out there.

You can buy a pair in person at #FOSDEM (no shipping!), or order them online:
https://lectronz.com/products/erring-ring-rgb36

#fosdem2026 #jewelry #jewellery #diy_electronics #Lectronz

Paper bags and color-changing RGB LEDs are a great combination 😍 So simple to make a lampshade for my Book Lamp project but the same process can certainly be used for other light-up projects.

Book Lamp instructions 👉 https://www.voltpaperscissors.com/

#books #stem #steameducation #mint #diy_electronics #makerspace #libraries #diy #kids

Paper bags and color-changing RGB LEDs are a great combination 😍 So simple to make a lampshade for my Book Lamp project but the same process can certainly be used for other light-up projects.

Book Lamp instructions 👉 https://www.voltpaperscissors.com/

#books #stem #steameducation #mint #diy_electronics #makerspace #libraries #diy #kids

Paper bags and color-changing RGB LEDs are a great combination 😍 So simple to make a lampshade for my Book Lamp project but the same process can certainly be used for other light-up projects.

Book Lamp instructions 👉 https://www.voltpaperscissors.com/

#books #stem #steameducation #mint #diy_electronics #makerspace #libraries #diy #kids

Paper bags and color-changing RGB LEDs are a great combination 😍 So simple to make a lampshade for my Book Lamp project but the same process can certainly be used for other light-up projects.

Book Lamp instructions 👉 https://www.voltpaperscissors.com/

#books #stem #steameducation #mint #diy_electronics #makerspace #libraries #diy #kids

Paper bags and color-changing RGB LEDs are a great combination 😍 So simple to make a lampshade for my Book Lamp project but the same process can certainly be used for other light-up projects.

Book Lamp instructions 👉 https://www.voltpaperscissors.com/

#books #stem #steameducation #mint #diy_electronics #makerspace #libraries #diy #kids

New #DayGlowShow today (Thurs) with @ishotjr ! Live deep-dive on #Jumperless ( @ArchiteuthisFlux ), new #RaspberryPi #hardware , event reports, & more 🤩

Noon PST, 3pm EST, 8pm UTC:
▶️ https://www.youtube.com/watch?v=w4RSgvY0gZw&list=PLwWiFinxwDlgomKdWjfaavDbMRdhHhfqQ&index=1
▶️ https://www.linkedin.com/posts/alexglow_a-live-hardware-build-session-this-month-activity-7419988748303532033-Wrqn
▶️ https://www.twitch.tv/glowascii

// #Electronics #Maker #DIY #DIY_Electronics