Reddit:Electronics

The plan was to make 32 bit Countdown timer using ESP 01, which has only 4 pins.

After lurking here forever, I finally get to share something I’m genuinely proud of. This is my power schematic made using KiCad 9

LT8641 buck + MIC5234 LDO chain (my 5 V → 3.3 V power path)

Blown thyristors, hopefully that's all it is. Waiting for the modules before attempting any repair. Circuit board looks okay, so does the power supply and some thick gloves just in case.

I will be plugging this in outside on an extension lead far away from me when turning on.

Hey folks, I’ve been tinkering with an ESP32-based clone of the Motogadget M-Unit Blue and finally decided to throw it out into the wild as open source:

👉 GitHub repo

It’s not a polished product (yet) — more like a prototype playground.
If you’re into DIY electronics/motorcycles:

• Try to boot it up,
• Hack it, improve it, break it,
• Build a prototype,
• Let me know how it goes.

Think of it as: “Motogadget is $$$, but what if… we open-source it?” 😅
Any feedback, PRs, or pics of your builds are super welcome. Let’s see where the community can take this! 🏍️⚡

Hi everyone, I’ve been lurking here for a while now and loved seeing your projects. Now it’s my turn to contribute — an electroencephalogram (EEG) I built from scratch.

It’s open source, and I’d be thrilled if some of you guys try it out, give feedback, or even improve on it! Repo (with gerber files) + demo video are in the comments.

Hey everyone!

I’ve been tinkering away on a little evening project for a while now and wanted to share it here. The Quansheng UV-K5 handheld radio is fun to hack on, but its original MCU only had 64 kB of flash memory. Not enough to run all the cool community-made features at once.

So, I designed a tiny flex PCB “implant” that lets me replace the stock chip with an STM32G0C1CET (512 kB flash, 144 kB RAM). It involved a lot of signal remapping, flex board experiments, and of course plenty of solder fumes....but in the end it worked!

A client approached me because their system suddenly stopped working.The system was designed by someone else and had been working fine for years.

After carefully studying the schematics, checking power supply, and measuring continuity with a multimeter, I spent hours debugging the issue.
After hours of thorough debugging, I found the root cause:
* 1 resistor was open
* 1 capacitor had wrong polarity

Replaced both. System came back to life. Minimal cost. Maximum satisfaction. 😊

https://www.linkedin.com/posts/pournima-choulwar-5a1b98220_embeddedsystems-iot-hardwaredebugging-activity-7373192591435087872-h5kj?utm_source=share&utm_medium=member_desktop&rcm=ACoAADe0VkkBj8YEaQG6Xut_N5ndwX9H6ADxDb8

Pulled apart an old valve amp and was struck by how good the color-coded caps and resistors looked. Modern SMD boards just feel boring in comparison. Anyone else miss this aesthetic?

Only two components, a esp32 board & 0.96 inch oled screen, blue is the 0.96 inch oled screen & black is the esp32 with USB-C

I was playing with 12v LED cob panels and wanted to drive them from a esp32 on breadboard. So i made this, with 6 2N7000 mosfets and the associated resistors. I was quite pleased with my happy notion of alternating the orientation of the transitors alternately so the sources were all in a line, this also made the drains form neat pairs. which was nice.

Hello everyone, Chris here. I built a simple TCI ignition module, and it works— but I haven’t tested it yet on a motorcycle or anything else. My friend said he had done this before on a classic car and it worked. I’ve uploaded a full tutorial video with the circuit and parts on YouTube. You can check it out and let me know what you think— I’ll put the link in the comments.

I want to make my own PCBs, but i find all the PCB design programs infuriating. So i have been honing my free hand skills, using blank copper clad board and an etch resistant pen. This, a simple 555 flasher, is my latest one. I used a SOIC 555 with 0805, and 0603 surface mount supporting components.

I am doing a diagnosis on some Hyundai Santa Fe D4HD. Injectors keep dying electronically every couple of minutes. Thought I might share this if anybody ever needs it...

Saves me having to always read for scissors or a bulky tape dispenser taking up valuable desk space. I had ordered one online and picked up a few more on my recent holiday to Japan.

My 12S BMS (BQ76952) works and I can turn on the fets via I2C.

Unfortunately I accidentally used a 6.3V tantalum on the 12V buck output which caused this catastrophic failure.

Just finished the major components of my workbench. Me and my girlfriend build the desk from scratch and i put my electronics in the room. Still got some tidying up to do and run power to the 3d-printer and lab bench power supply to the far left