2 layers56.5 × 22.2 mm

Updifier
Dlloydev/Updi-Key
This DIY open source hardware connects inline with any UPDI programmer to provide a HV UPDI programming solution for tinyAVR® 0/1/2 series MCUs.
36 parts15MIT
KiCad boards from 2 GitHub repositories tagged “tinyavr”, the most starred first; open any of them in PCBKit.

Dlloydev/Updi-Key
This DIY open source hardware connects inline with any UPDI programmer to provide a HV UPDI programming solution for tinyAVR® 0/1/2 series MCUs.

ericmcdaniel/wedding-keepsake
The full design files and source code of the RGB LED matrix on a PCB keychain given as a keepsake party favor at my wedding.