2 layers

ATmega32U4-breakout board
Sn3cor/ATmega32U4-USB-C-breakout-board
Arduino Pro Micro like ATmega32U4 USB-C breakout board
22 parts
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

Sn3cor/ATmega32U4-USB-C-breakout-board
Arduino Pro Micro like ATmega32U4 USB-C breakout board

Sn3cor/wyse-mod
Wyse Keyboard converter from 4P4C to USB, compatilble with Soarer's firmware