#diy_electronics — Public Fediverse posts

I liked the way the traces on this old 1GB laptop ram resemble a building. This is a focus stacked image made from 15 images stacked together with different depths of focus.

#electronics #DIY_electronics #photography

Here is Page 1 and 2 of my book, Reference Circuits, Volume 4: Digital Logic." It is a book made from a circuit board, with actual logic gates on each page. Throughout the book, the odd pages explain the theory, behind the circuit, while the even pages each have two logic gates. Page 1 and 2 are shown here. The AND Gate and OR gates are the easiest to understand. For the AND gate, all 4 input buttons must be pressed for the output to change from low to high. For the OR gate, if any of the four input buttons are pressed then the output is high. Typically, logic low is tied to the ground, and it represents false. Logic high is tied to the positive rail, in this case 5 volts and it represents true. I'll post page 3 tomorrow. If you want to get your hands on a copy of this book, I'll have it on Crowd Supply in the coming months. Link below.

https://www.crowdsupply.com/bolt-industries/reference-circuits-vol-4

#DIY_electronics #electronics #Reference_Circuits #electricaIengineering
@crowdsupply

This is my book, Reference Circuits Volume 4: Digital Logic. It's not a regular book on paper, it's made from printed circuit boards. Volume 4 covers Digital Logic. Each page contains 2 types of logic gates. Yes, you read that right. Real, working logic gates on a book page. Plug into a USB-C cable and press the input buttons to change the input states, and watch the output LEDs change or not change. I'll be launching the book in the near future on Crowd Supply. You can sign up on the pre-launch page (link below) to get an email when the campaign launches. I'm going to post each of the logic gates and explain how they work in the coming days. Follow me to see more!

https://www.crowdsupply.com/bolt-industries/reference-circuits-vol-4

#DIY_electronics #electronics #Reference_Circuits #electricaIengineering
@crowdsupply

Today’s perplexing observation: of the difficulty to trust IoT sensors in the DIY space

I can understand the sudden change in temperature & humidity right before 1 AM: yesterday was hot, this room is closed with barely any air flow, and that’s when I finally opened a window. The first immediate drop was when I noticed the sensor was too close to the microcontroller, and the gradual drop over the next few hours is due to the window.

The next change in temperature & humidity slightly before 8 AM was when the sun rose, so I get that too.

But what I do not get is the change in sensor readings after a microcontroller reboot around 11:20 AM? Thankfully, temperature & humidity were stable, but how can I trust the other values?

I know that VOC, eCO2 and iAQ are all estimates in this sensor, and none of these represent directly a sensor reading. The sensor measures a resistance due to the presence of certain compounds in the air but this resistance is not provided by the lib: instead they make up these three values from a formula.

I also know this sensor needs a few minutes to self calibrate as it boots up, and after that there is another value (not represented here) for the reliability of the readings over time and mostly due to air flow.

Still, that’s a huge drop. It looks like all I need to do to clean the air in the room is to reboot the sensor?

#DiyAirQualityMonitor #bme680 #Diy_Electronics

After [mumble mumble] years I have finally pulled the prototype robotic chassis off the floor to finish wiring it up and to get to the navigation development phase.

#diy_electronics #robotics

Lego-Licht-Verkabelung Teil 3

Manche Projekte müssen erst etwas reifen habe ich das Gefühl.

Nach dem ich den Plan hatte in Standard-Deckel rechteckige Löcher zu schneiden habe ich aufgegeben und 3D-gedruckt.

In den Bildern meine ersten Versuche und das Endergebnis. Verkabelung funktioniert - Lampe leuchtet!

Positiv:
Mehr Platz für die Verkabelung
Perfekter Sitz der Dosen

Negativ:
Nachhaltigkeit
Viel Gehirnschmalz und am Ende doch gedruckt

#diy #elections #diy_electronics #lego

Getting back to pedal-building after a LONG break. Listed this beauty for sale a couple of days ago.

It's been long enough that I have no idea if it'll sell, or how quickly. Back when I was selling a fair number, many were going to the EU and/or the US. This is listed only in the UK, because Brexit and Trump, respectively. Which I'm both sad and mad about.

#guitareffects #DIY_electronics #making #diypedals #effectspedals

This is probably the coolest DIY robot you can make by simply connecting a motor to a battery. No sensors, no Arduino, no soldering, no coding, etc.—just pure mechanics made from cardboard. I use this DIY project to teach kids the creative use of technology.

Visit my website for more: https://www.voltpaperscissors.com/lazychameleons

#robots #stem #fediLZ #diy #diy_electronics #mint #stemeducation #papercircuit #papercraft #robotics

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

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

New lab gear for upcoming TōGō-Lab projects: Picked up Nordic’s Power Profiler Kit II to get a good look at low-power behavior instead of guessing with a handheld power meter.

Setup in a virtual Win10 was easy. But getting it running on my Ubuntu workbench machine was a bit more fiddly than expected.

Nordic's AppImage works, but not quite as plug-and-play as I hoped.

Blog:
https://togo-lab.io/?p=258

Git:
https://gitea.togo-lab.io/tgohle/0006-Setting_up_Nordic_PowerProfilerKitII_Linux

#ToGoLab #Nordic #PPKit2 #nanoAmpere #Linux #Ubuntu #Electronics #DIY_electronics #LabNotes #DIY

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

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

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