The Arduino Nano is a compact board similar to the UNO.
The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one.
|Operating Voltage||5 V|
|Flash Memory||32 KB of which 2 KB used by bootloader|
|Clock Speed||16 MHz|
|Analog IN Pins||8|
|DC Current per I/O Pins||40 mA (I/O Pins)|
|Input Voltage||7-12 V|
|Digital I/O Pins||22 (6 of which are PWM)|
|Power Consumption||19 mA|
|PCB Size||18 x 45 mm|