Arduino Pro Micro Leonardo compatible 3.3V 8MHz ATmega32U4 - TESTED

The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface. This tiny little board

Leonardo Pro Micro ATmega32U4 3.3V 8MHz Replace ATmega328 for Arduino Pro Mini

Pro Micro Arduino Compatible 16MHz or 8MHz - Canada

Arduino Compatible Pro Mini EDArduino [Volts, ICs] - ElectroDragon

What is the difference between Arduino Pro Mini and Arduino Pro Micro? - Quora

Beetle CM-32U4 Compatible w/ Arduino Leonardo ATmega32U4 - RobotShop

PRO MICRO ATMEGA32U4 5V 16MHz Free Pins Arduino Leonardo Pro Micro Compatible £8.35 - PicClick UK

Overview, Introducing Bluefruit LE Micro

The Inland PRO MICRO is a microcontroller board based on the ATMEGA32U4-MU. It is an easy-to-use open source hardware and is fully compatible with Arduino. This board offers 18 GPIO and 9 analog input pins as well as SPI and I2C serial communication.

Inland Pro Micro Development Board Arduino Compatible KS0249

Arduino Micro Pro Pin Out

1 x Mini Digispark Kickstarter ATTINY85 USB Development Micro Board Ar – eElectronicParts

Pro Micro 3.3V/8MHz Arduino Compatible Atmega32U4 Breakout

ATmega32U4 3.3V 8Mhz Pro Micro 5V 16MHz Board Module For Arduino/Leonardo ATMega 32U4 Controller Pro-Micro Replace Pro - AliExpress

Pro Micro & Fio V3 Hookup Guide - SparkFun Learn