The classic Arduino Nano is the smallest board to build your projects with. The Arduino Nano is a small complete and breadboardfriendly 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 MiniB USB cable instead of a standard one.

Microcontroller ATmega328 Architecture AVR Operating Voltage 5 V Flash Memory 32 KB of which 2 KB used by bootloader SRAM 2 KB Clock Speed 16 MHz Analog IN Pins 8 EEPROM 1 KB DC Current per I/O Pins 40 mA (I/O Pins) Input Voltage 712 V Digital I/O Pins 22 (6 of which are PWM) PWM Output 6 Power Consumption 19 mA PCB Size 18 x 45 mm Weight 7 g