Micro/type-c Usb Atmega32u4 Module 5v 16mhz Board For Arduino Atmega32u4-au/mu Controller Pro Micro Replace Pro Mini - Integrated Circuits - AliExpress
Amazon.com: ARCELI Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Compatible to Pro Micro Serial Connection with Pin Header : Electronics
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
SparkFun Qwiic Pro Micro – USB-C (ATmega32U4) | Elektor
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
Correct implementation of USB Type-C for USB 2.0? (ATMEGA 32u4) : r/PrintedCircuitBoard
Arduino Pro Micro with ATmega32U4 5V/16MHz USB type C - PRO-MICRO| UGE Electronics Store Egypt
Monday Experiment: Bootloading an ATmega32u4 with Arduino | Murchlabs