Arduino Micro

The Arduino Micro is the smallest board in the Arduino family. It is based on the ATmega32U4 microcontroller. This board features 20 digital I/O pins of which 7 can be used for PWM output and 12 can be used as analog input. The Micro and the Nano (which we will see a little later) can be used for a project where the Arduino Uno may be too big.