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.

Arduino Pro Micro Atmega32u4 Board at Rs 390/piece, Arduino Electronic Development Board in New Delhi

Handwire Rotary Encoder to Lily58 Pro Guide - kriscables

Pro Micro - ATmega32U4 5V/16MHz —

Wholesale arduino pro micro ICs, Electronic Components –

Description: 1. The Pro Micro is similar to the Pro mini except with a ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on board and do away with bulky external USB interface. 2. This tiny little board does all of the neat-o for for tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx.

AITRIP 4pcs Pro Micro ATmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Compatible with Pro Micro Serial

QMK Pro Micro Pinouts? : r/olkb

Pro Micro 5V/16MHz Arduino Compatible Microcontroller - RobotShop

Pro Micro (USB-C Version) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio

Pro Micro : how do I use a serial interface to communicate with a device? - Microcontrollers - Arduino Forum