ATmega32U4 Pro Micro Controller Board for Arduino Pro Micro 5V Replace – eElectronicParts
Arduino Micro Pro ATMEGA32U4 5V/16MHZ
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Arduino Micro
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Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio
Type-c Mini Usb Pro Micro For Arduino Atmega32u4 5v/16mhz 3.3v/8mhz Module With 2 Row Pin Header Leonardo Usb Interface Board - Integrated Circuits - AliExpress