Arduino Mega 2560 R3

by Arduino
The latest version of the Arduino Mega

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Description from the Arduino Mega 2560 website:

The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 15 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 is compatible with most shields designed for the Arduino Duemilanove or Diecimila.


The Arduino Mega 2560 R3 kit includes the assembled Arduino board, four rubber bumpers, a sheet of cool stickers, and some printed documentation.

Here's what the Arduino project has to say:

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists and anyone interested in creating interactive objects or environments.

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Open Source Hardware

This kit is open source hardware. Arduino makes the hardware source files like the schematic and the pcb files available. The schematic and pcb files are available on the Arduino Mega 2560 page.