# Arduino Pro Micro ## Description The Micro is a microcontroller board based on the ATmega32U4 (datasheet), developed in conjunction with Adafruit. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard. The Micro board is similar to the Arduino Leonardo in that the ATmega32U4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Micro to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. ## Project Details - **Owner:** xendilor - **Created:** 9/22/2025 - **Last Updated:** 9/22/2025 - **Visibility:** Public - **Forks:** 3 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/xendilor/arduino-pro-micro~tw](https://www.flux.ai/xendilor/arduino-pro-micro~tw).* --- *Generated from [https://www.flux.ai/xendilor/arduino-pro-micro~tw](https://www.flux.ai/xendilor/arduino-pro-micro~tw)*