Arduino Mega is a microcontroller board based on the ATmega1280. It contains everything needed to support the microcontroller. Simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Mega is compatible with most shields designed for the Arduino Duemilanove or Diecimila.
The USB Arduino Duemilanove.
|Max Input Voltage||20V|
|Clock Speed||16 MHz|
|Number of Positions||54 Digital (14 of which are PWM)|
|Flash Memory||128 KB|