2 layers34.5 × 45.8 mm

Pro micro shield
Pimentoso/mini4wdchrono
Software for Arduino based 3-lane lap timer for Tamiya Mini4wd.
8 parts30MIT
KiCad boards from 3 GitHub repositories tagged “electron”, the most starred first; open any of them in PCBKit.

Pimentoso/mini4wdchrono
Software for Arduino based 3-lane lap timer for Tamiya Mini4wd.

shridattdudhat/Oxikit-Brainboard
An Open Source Oxygen Concentrator Brain Board for Oxikit with Particle or ESP32 board !

stephen-j8/bread-board-power-supply
Dual-rail ±12V breadboard power supply PCB — LM7812/LM7912 linear regulators, designed in KiCad. Second fabricated project.