Arduino Nano (ATmega328P)

The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.0) or ATmega168 (Frduino Nano 2.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. The Nano was designed and is being produced by Gravitech.

Specifications:

• Microcontroller Atmel ATmega168 or ATmega328
• Operating Voltage (logic level) 5 V
• InputVoltage (recommended) 7-12 V
• Input Voltage (limits) 6-20 V
• Digital I/O Pins 14 (of which 6 provide PWM output)
• Analog Input Pins 8
• DC Current per I/O Pin 40 mA
• Flash Memory 16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader
• SRAM 1 KB (ATmega168) or 2 KB (ATmega328)
• EEPROM 512 bytes (ATmega168) or 1 KB (ATmega328)
• Clock Speed 16 MHz
• Dimensions 0.73″ x 1.70″ Power:
  The Frduino Nano can be powered via the Mini-B USB connection 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.