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.

Help! How to relate ProMicro pins? : r/MechanicalKeyboards

Handwire Rotary Encoder to Lily58 Pro Guide - kriscables

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

AITRIP 4PCS Pro Micro ATmega32U4 5V 16MHz Type-C Development Module Board with 2 Row pin Header Compatible arduino Leonardo Replace ATmega328 Pro Mini : Industrial & Scientific

Handwire Rotary Encoder to Lily58 Pro Guide - kriscables

How to use a Pro Micro as a cheap controller/converter - deskthority

Pro Micro Atmega32U4 5V/16Mhz Leonardo Mini MCU With Pin Headers – Gadget AU

Pro Micro Atmega32u4 5v16mhz Replace Atmega328 For Arduino Pro Mini With 2 Row Pin Header For Leonardo Mini/type-c Usb Interface - Integrated Circuits - AliExpress

Arduino Pro Micro Board, 14 at Rs 370/piece in Thane

Type-C MINI USB Pro Micro For Arduino ATmega32U4 5V/16MHz 3.3V/8Mhz Module With 2 Row Pin Header Leonardo Usb Interface Board - AliExpress

Arduino Pro Micro connections pinouts.