The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.0). It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one.
Funkcie
The Arduino Nano is a microcontroller board based on the ATmega328
14 digital input/output pins (of which 6 can be used as PWM outputs)