Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics
Arduino Keyboard Is Gorgeous Inside And Out | Hackaday
Pro Micro | Hackaday
Amazon.com: OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino : Electronics
USB to USB keyboard converter build log(Pro Micro 3.3v with mini host shield)
USB to USB keyboard converter build log(Pro Micro 3.3v with mini host shield)
Use a Pro Micro in a Keyboard | Details | Hackaday.io
Amazon.com: Beetle Virtual Keyboard Pro Micro USB ATMEGA32U4-AU Module Mini Development Expansion Board 5V 16MHz I2C : Electronics
Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics
Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio
Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio
Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics
GitHub - CyberCityCircuits/Kit-Arduino-Pro-Micro-USB-Keyboard-9023: This is the repo for the Arduino Micro USB Keyboard for sale from Cyber City Circuits.
Kevin Boone: Building and programming a USB keypad from the ground up
Pro Micro & Fio V3 Hookup Guide - SparkFun Learn
USB to USB keyboard converter build log(Pro Micro 3.3v with mini host shield)
Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio