ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
Micro/mini/type-c Usb Atmega32u4 Module 5v 16mhz Board For Arduino Atmega32u4-au/mu Controller Pro-micro Replace Pro Mini - Integrated Circuits - AliExpress
SparkFun Qwiic Pro Micro – USB-C (ATmega32U4) | Elektor
microcontroller - How can I program an Atmega32u4 over USB with this schematic? - Electrical Engineering Stack Exchange
Arduino Micro USB Microcontroller
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
TIAO AVR / Micro SD Development Board (ATMEGA32U4) - TIAO's Wiki
ATmega32u4 Minimal USB-C Resources - EasyEDA
Elite-C V4 - USB-C Pro Micro Replacement ATmega32u4 – Keebio
I am working on a USB c powered atmega32u4 based macropad. Will this work? : r/avr
Micro Compatible Board, ATmega32u4 - PiShop.us
Qwiic Pro Micro USB-C (ATmega32U4) - SparkFun | Mouser
AVR ATmega32U4 USB Development Board – Waiting for Friday