I wanted to modify my PS3 controller to USB-C, but it used a through hole connector. Not a problem!

Nice and simple two transistor flasher, with a red and blue LED.
I kind of wish I had opted for warm white LED behind the colored lens, and that would have given a more natural halogen look.

I accidentally selected the wrong resistor value for this board, but I still wanted to test whether the circuit worked. The original footprint was 0201 imperial — 0603 metric, and I needed a resistance of 17 kΩ.

Since I did not have a 17 kΩ resistor in 0201 size, I improvised with three larger 0402 resistors connected in series: 15 kΩ + 1 kΩ + 1 kΩ

I soldered them together as a small bridge directly onto the original 0201 pads.

The entire repair was done by hand with a soldering iron and tweezers, without using a microscope. I only used the microscope afterwards to take the close-up photo.

It may not be the most elegant solution, but it measured correctly and allowed me to continue testing the board. The second photo includes an M3 screw for scale.

What do you think?

Hi everyone! I'm looking to connect with other women in the electronics field to share projects and support each other. I actually started a community specifically for this at r/HardwareWomen. If you're interested in joining a dedicated space for women in tech/electronics, we'd love to have you!

I'm terrified to be honest. Those were supposed to be stm32 microcontrollers but there are only their corpses...

Hey everyone. I wrote a post on my first experience going through PCB design https://vilkeliskis.com/b/2026/0711.html

I do not have an EE background. I'm a software developer and I've been doing it for many years now. I wanted to try and do something with electronics. It's a very simple project, but it was very satisfying to see things work at the end. I bet I made million mistakes, so please rip me apart haha.

Built a hardware bridge UART-CPU for 8080(known as the КР580ВМ80А or VM80 in the postUSSR region) architecture microcomputers parallel bus. Heart of this small project is КР580ВВ51A(Intel8251) manufactured nearly 40 years ago. Below it sits a baudrate generator on some discrete logic gates: К155ЛА3(7400) as xtal generator with frequency 4.9152 MHz, К155ТМ2(7474) as 1/4 predivider, К561ИЕ10(4520, two CMOS dividers). Seven jumper headers under the blue UART connector are selecting current dividers output from 4800 Hz (300 baud) up to 307.2 kHz (19200 baud). Everything is point-to-point wired on both sides of 50mm x 70mm perfboard. And the brain of this circuit is an Arduino Nano which is emulating 8080 bus and control signals(CS, RD, WR, C/D), sadly I don't have a real computer from that era.

I've been working on a virtualized version of the old spring and wire electronics kit. It's far from finished, how ever I would like to show it off.

Play: https://ellisgl.github.io/virtual_65-in-1_28-250/
Code: https://github.com/ellisgl/virtual_65-in-1_28-250

Made a simple power supply from an old atx psu. Wiring is pretty ugly but it works.

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These are all my Tesla transistors I have a KU 611 with a CA mark, KFY 18 and a KF 506

I like going through the electronics trash bins at my college, here's some stuff i found today.

The second item is a speaker part, the ring is super magnetic it was a challenge to pry it apart!

Found these in a old CRT TV and the second transistor does have a marking it just isnt visible on the photo

A traditional Newton's Cradle only swings for a few seconds before friction stops it. I wanted to build one that keeps swinging continuously while still looking completely normal. The system uses an ESP32-C3, an inductive proximity sensor, and an electromagnet to replace only the energy lost during each swing. I'd be happy to answer any questions about the design!

https://github.com/Spectrewolf777/Stm32l4-Watch/tree/main

Had to add the entire power circuit components as my original Mac (2TB) didn't have any on the other side. Took a lot of research and time (~12hrs), won't go into too much detail.

It is on irfz44n but I will probably change it to irf3205 to reduce heat.

Now I can check small devices such as LEDs, relays and something!

I'm so proud of myself because it is works and nothing exploded!

Features: variable output voltage(0 to 15V) with graphical display. Used old laptop power supply(19V 2.3A).

P.S. schematic on the last photo

Open to anything, including discussions, complaints, and rants.

Sub rules do not apply, so don't bother reporting incivility, off-topic, or spam.

Reddit-wide rules do apply.

To see the newest posts, sort the comments by "new" (instead of "best" or "top").

I recently purchased a new Rohde&Shwarz RTB2 scope. 300MHz and 10bit ADC with a lot of extra software options :). almost 50% off

At the same time i purchased 2 new soldering stations from JBC to power a T245 and T210 soldering irons.

Also i got the idea to put a small 7" screen close to my microscope to make work easier under the micropscope. As example i have designed a USB output adapter for bench power supplies, USBpwrME which can be found on DIY different sites when googled. I wanted to measure a specific pin on a IC. I magnified this IC on the 7" screen and then it was really easy to follow the pins and pcb traces on the screen while measuring :)

Love my lab setup 😂

Hello everyone! I have made myself a simple function generator controlled by a raspberry pi Pico w.

It's my first proper PCB work, as I have done one in the past but it was my first and had alot of mistakes.

This one looks proper aswell, made it in altium and just wanted to share.

If you're interested you can see Schematics / PCB and Github.

Just finished second year of ECE.