Arduino Mega 2560 R3
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Arduino Mega 2560 R3
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Arduino Mega 2560 R3
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The Arduino Mega is a microcontroller board based on the ATmega2560. It 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 is compatible with most shields designed for the Arduino UNO.

The Mega 2560 R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Mega 2560 R3 works with all existing shields but can adapt to new shields which use these additional pins.

Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).


  • ATmega2560 Microcontroller
  • 5V Operating Voltage
  • Input Voltage (recommended) 7-12V
  • Input voltage Limits 6-20v
  • 54 Digital I/O Pins (of which 14 provide PWM output)
  • 16 Analog Input Pins
  • 40 mA DC Current per I/O Pin
  • 50 mA DC Current for 3.3V Pin
  • 256 KB of which 8 KB used by bootloader of Flash Memory
  • 8 KB SRAM
  • 16 MHz Clock Speed



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Arduino Mega 2560 R3 - 54 Digital I/O Pins (14 PWM outputs)

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