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Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics
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ATmega32U4 5V 16MHz Module Pro Micro Usb Controller Board For Arduino Nano With Bootloader Mega32U4 Mini Leonardo ATMEGA32U4 AU|pro micro|usb boardboard usb - AliExpress
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