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.

Pro-Micro – Mechboards

SuperMini nRF52840 Pro Micro Bluetooth LE (BLE) Controller – Keebio

nRF Pro Micro Wireless Controller - 42. Keebs

Fixing an Arduino Pro Micro: the USB Port Came Off !! : 17 Steps - Instructables

Adafruit KB2040 controller: Pro Micro size, awesome RP2040 power #Keyboards #RP2040 @KbdNews « Adafruit Industries – Makers, hackers, artists, designers and engineers!

The micro usb of my arduino pro micro rip off, so I fixed it. What do you think? : r/arduino

Pro micro atmega32u4 5V/16MHz Development board microcontroller with bootloader IDE and USB C

Hands-On With the Sparkfun Pro Micro RP2040 - Embedded Computing Design

STeMCell - STM32 based pro micro pinout : r/ErgoMechKeyboards

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

Pro Micro ATMEGA32U4 Arduino Pins and 5V, 3.3V Explained - Robojax

I ripped the usb port off of my Arduino pro micro : r/arduino

Pro Micro & Fio V3 Hookup Guide - SparkFun Learn

Leonardo Pro Micro USB Key 5V 16MHz ATmega32U4 - Arduino compatible - TESTED

KS0503 Keyestudio PRO MICRO 5V 16MHZ Development Board(Black and Eco-friendly) - Keyestudio Wiki