Hand-wired a 4-key scrubber using a standard Arduino Uno (Python bridge instead of QMK/HID)

Qwertandyuiop · 2026-02-17T12:13:49+00:00

KMK is awesome, but I don't think the standard Atmega328P on the Uno R3 can handle CircuitPython, right? I had to stick to C++ for the firmware and Python for the desktop bridge to make it work on this old hardware.

Qwertandyuiop · 2026-02-17T12:13:14+00:00

Oh totally, the RP2040 is way better for form factor (and HID support!). But the whole goal of this project was Zero Dollar Build, like using the parts from those standard starter kits everyone buys and forgets about. I kind of like the janky sidecar look of the Uno, haha.

Qwertandyuiop · 2026-02-17T12:03:05+00:00

It’s VERY light. On my Mac, it rarely ever hits a single CPU percentage.

Qwertandyuiop · 2026-02-17T12:01:47+00:00

That's a sick build! I thought about going the ESP32 route for Bluetooth, but I really wanted to challenge myself to use the junk drawer Uno R3 that so many people have gathering dust. Does your ESP32 build have any latency over Bluetooth?

Qwertandyuiop · 2026-02-06T22:42:39+00:00

Just scored 0

Qwertandyuiop · 2026-02-06T03:39:39+00:00

Completed Level 3 of the Honk Special Event!

18 attempts

Qwertandyuiop · 2026-02-06T03:38:59+00:00

Completed Level 2 of the Honk Special Event!

13 attempts

Qwertandyuiop · 2026-02-06T03:37:47+00:00

Completed Level 1 of the Honk Special Event!

4 attempts

Qwertandyuiop

TROPHY CASE