Pro Micro pinout

The Arduino Pro Micro is cheap (~3$) and perfect for small boards (less than 81 keys). With a little hack though, it can drive a keyboard with up to 100 keys.

PD Micro

Pro Micro · tmk/tmk_keyboard Wiki · GitHub

Pro Micro pinout

ATmega32U4 Pro Micro Controller 5V 16MHz with Micro USB or USB-C

Buy Pro Micro - 5V/16MHz - Atmega32u4 module - Botland - Robotic Shop

HELP]Pro micro and ST7789 cant get it to work - Displays - Arduino Forum

SparkFun Pro Micro RP2040 Review: The Best Small RP2040 Board?

Ks0249 keyestudio PRO MICRO Development Board - Keyestudio Wiki

Arduino Pro Micro Pinout: Connection Pins for the ATmega32U4-Based Microcontroller

Pro Micro Raw pin - Project Guidance - Arduino Forum

Arduino pro micro turning off itself - Project Guidance - Arduino Forum

What is the Arduino Pro Micro? - Quora