HiLetgo 3pcs Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header
Amazon.com: Arduino Pro Mini 328 - 3.3V/8MHz : Electronics
MakerFocus Mini Nano V3.0 ATmega328P Microcontroller Board w/USB Cable For Ar duino
SNCT Nano Board ATmega328P CH340 Compatible with Arduino Nano V3.0 Without USB Cable (3 Pack)
ACEIRMC Pro Micro for Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller
Amazon.com: Arduino Nano Every (Single Board) [ABX00028] : Electronics
ARDUINO A000005 DEV BRD, ATMEGA328, ARDUINO NANO 3.0
SparkFun Pro Mini ATmega328-3.3V/8MHz Development Board Compatible with Arduino Boards and IDE
SparkFun Pro Mini ATmega328-5V/16MHz Development Board Compatible with Arduino Boards and IDE
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
HiLetgo 3pcs Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro USB Pro Micro Development Board Microcontroller Compatible to Arduino Pro Micro Serial Connection with Pin Header