Note: Due to the latest developments in the conflict between Arduino LLC and Arduino SRL we decided not to sell anymore Arduino products. Please see below for some competitively priced replacement and clone boards:
For more information regarding the conflict between Arduino LLC and Arduino SRL please see the links below:
The Arduino Mega 2560 Rev3 is a microcontroller board based on the ATmega2560 (datasheet).
IIt has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. 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 2560 R3 is compatible with most shields designed for the Arduino Duemilanove or Diecimila.