Arduino Pro Micro Compatible with Atmega32u4 - tinkerBOY

Macintosh M0110 USB converter

Arduino Pro Micro ATmega32U4-MU 5V/16MHz Module with Type-C USB

Cytron Arduino Pro Micro Compatible w/ Pre-soldered Headers - RobotShop

Got My Apple Extended Keyboard II Working - Vintage keyboards - KeebTalk

The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with a bulky external USB interface. This tiny board does

Arduino Leonardo Pro Micro Atmega32U4 5V/16Mhz Replace Pro Mini ATmega328

Keyestudio PRO MICRO 5V 16MHZ ATMEGA32U4-MU Development Board For Arduino

Tinkerboy V2.0.01 + Teensy or Pro Micro (pinouts?) - sudomod

running at 5V/16MHz Supported under IDE v1.0.1 On-Board micro-USB connector for programming 4 x 10-bit ADC pins 12 x Digital I/Os

OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino

Button Box Part 2 GamePad Setup Arduino Pro Micro

ATmega32u4 PRO MICRO USB Leonardo (Arduino-Compatible) – Flux Workshop