Recent Projects

The first truly personal device for kids — designed to grow with them from drawing sprites to writing C++

RCKid

Offline USB-C password manager. No cloud, no apps, no battery.

ZeroKeyUSB

A deterministic data machine built on a clock that cannot be argued with

PTSG-CPU-Formation

tsuneoohnaka Tsuneo.Ohnaka

Another homebrew computer based on the MSX standard. But it uses a Z380 microprocessor.

XRX - eXperimental Research X

marcellus-pereira Marcellus Pereira

If you need to convert 12V, 24V, or any higher DC voltage into a stable 5V output, the LM2596 Buck Converter is one of the most reliable and

5V Buck Converter Using LM2596

electronicsworkshops

SITL/HIL testing platform for rocketry firmware. Validate apogee detection and pyro logic against a RocketPy simulation before you fly.

SITL/HIL Testing Platform for Amateur Rocketry

It's about time for someone to make a repro for the DS, so here I am with this proof of concept

A custom DS flashable cartridge

USB connecting box

Calling! Connecticity!

tokaken tokaken

Open-source Twin USB Host Switch x Triple Hub. 4-layer KiCad 9, STM32 C++ firmware & OLED telemetry. Housed in snap-fit MJF Nylon.

H₂H³ / Smart Twin USB Host Switch & Triple USB Hub

A tiny FPGA-resident programmable sequencer that controls time and space directly

PTSG — Programmable Timing Sequence Generator

tsuneoohnaka Tsuneo.Ohnaka

A beginner made a typing practice device.

Haptic Touch Typing Trainer Using Vibrating Keys

cuprice cuprice

Universal Latch-based Shift Register. Still not JTAG and fewer pins

DTAP2-ULSR

yann-guidon-ygdes Yann Guidon / YGDES

Home_LAB

rhea-rae Rhea Rae

After listening to a discussion of the next 100 years of home shop machining and the "Laser Bandsaw", I realized that I COULD build one!

Laser Bandsaw

I didn't just rewind the microwave transformer — I kept its control board and rewrote the firmware to run a spot welder.

Oh No, Not Another Microwave Spot Welder

wichers wichers

9 volts, DIY motors, Arduino and DRV8833

Beginner "H2" line follower

gmez-mora-rodrigo-uriel Gómez Mora Rodrigo Uriel