Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio
Adafruit ItsyBitsy 32u4 - 5V 16MHz (AF-3677) USB bootloader AVR109 compatible (same as Flora, Feather 32u4,
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
Mini Usb Atmega32u4 Pro Micro 5v 16mhz Board Module For Arduino/leonardo Atmega 32u4 Controller Pro-micro Replace Pro Mini - Integrated Circuits - AliExpress
LilyPad Arduino USB - ATmega32U4 Board - DEV-12049 - SparkFun Electronics
PCB with atmega32u4 au "Unknown USB (Device Descriptor Request Failed)" : r/AskElectronics
1Pcs Micro USB 32U4 Mini USB 32U4 Type-C USB 32U4 ATMEGA32U4 Module - AliExpress
How To Make DIY Keyboard With ATMEGA32U4 Dev Board |From ICStation.com - YouTube
Amazon.com: Mini USB ATmega32U4 Pro Micro 5V 16MHz Board Module Leonardo ATMega 32U4 Controller Pro-Micro Replace Pro Mini for Arduino : Toys & Games
Amazon.com: Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board with 2 Row pin Header Compatible ard-uino Leonardo Replace ATmega328 Pro Mini : Electronics
MICRO/MINI/TYPE-C USB ATMEGA32U4 Module 5V 16MHz Board For Arduino ATMEGA32U4-AU/MU Controller Pro-Micro Replace Pro Mini - AliExpress
Adafruit Itsy Bitsy 32u4 - 3V 8MHz (AF-3675) ATmega32u4, USB bootloader AVR109 compatible (Flora,Feather 32u4,
Epi 32U4
ATMEGA32u4 USB - Microcontrollers - Arduino Forum
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - DEV-15795 - SparkFun Electronics
Intro | Atmega32u4 Breakout | Adafruit Learning System
USB ATMEGA32U4 Mini Development Board For Arduino Leonardo | eBay
GitHub - dmadison/Pro_Micro_USB-A: ATMega32U4 Arduino board from SparkFun, modified to work with a USB-A connector
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - DEV-15795 - SparkFun Electronics
Beetle USB ATMEGA32U4 Mini Development Board Module For Arduino Leonardo | eBay
Epi 32U4 - An Arduino-compatible USB-C development board with ATmega32U4 MCU (Crowdfunding) - CNX Software
USB programming an ATmega32U4 at 3.3V - Project Guidance - Arduino Forum
Amazon.com: Diitao 2PACK Pro Micro 5V 16MHz Atmega32U4 Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Pro Micro Serial Connection with 2-Row Pins Header : Electronics
