Pololu - 8. The A-Star 32U4 USB interface
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
microcontroller - How can I program an Atmega32u4 over USB with this schematic? - Electrical Engineering Stack Exchange
Amazon.com: Pro Micro ATmega32U4 5V 16MHz USB Type C Development Module Board with 2 Row pin Header Compatible arduino Leonardo Replace ATmega328 Pro Mini… : 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
Amazon.com: Mini USB ATmega32U4 Pro Micro 5V 16MHz Board Module Leonardo ATMega 32U4 Controller Pro-Micro Replace Pro Mini for Arduino : Toys & Games
GitHub - dmadison/Pro_Micro_USB-A: ATMega32U4 Arduino board from SparkFun, modified to work with a USB-A connector
ATMEGA32u4 USB - Microcontrollers - Arduino Forum
Atmega 32u4 Based Generic USB Mouse (Part 1/25)
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - DEV-15795 - SparkFun Electronics
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - DEV-15795 - SparkFun Electronics
LilyPad Arduino USB - ATmega32U4 Board - DEV-12049 - SparkFun Electronics
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
Beetle USB ATMEGA32U4 Mini Development Board Module For Arduino Leonardo | eBay
Epi 32U4
bootloader - Custom board with ATMega32u4 having USB issues - Arduino Stack Exchange
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
ATmega32u4 usb powered minimal bootloader and test circuit - Microcontrollers - Arduino Forum
ATmega32U4 Pro Micro Controller for Arduino Micro USB 5V 16MHz Replace ATmega328 | eBay
USB ATMEGA32U4 Mini Development Board For Arduino Leonardo | eBay
