This is a cute little keypad I designed to showcase how to integrate an ATMega32u4 directly onto your keyboard PCB. It is compatible with Cherry, Alps, and Chocc style keys and has per-key backlighting with SK6812 mini-e LEDs. It also has some 3535 SK6812 on the back to give a nice backlight when used with a clear case. Watch the video and consult the linked eagle files for more info:The parts I used:Switches: https://s.click.aliexpress.com/e/_ALHz1fArduino Pro Micro (desolder the microcontroller due to chip shortage): https://s.click.aliexpress.com/e/_9wc5dPDiodes: https://s.click.aliexpress.com/e/_A20xL3SK6812 mini-e LEDs: https://s.click.aliexpress.com/e/_9IoeIzWS6812 3535 LEDs: https://s.click.aliexpress.com/e/_AUtpzBUSB-C Port: https://s.click.aliexpress.com/e/_9vWz2h
