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.
Specifications
Microcontroller
5 Volt
Input Voltage (recommended)
7-12 Volt
Input Voltage (limit)
6-20 Volt
Digital I/O Pins
54 (of which 15 provide PWM output)
Analog Input Pins
16
DC Current per I/O Pin
20mA
DC Current for 3.3V Pin
50mA
Flash Memory
256 KB of which 8 KB used by bootloader
SRAM
8KB
EEPROM
4KB
Clock Speed
16 MHz
LED_BUILTIN
13
Length
101.52 mm
Width
53.3 mm
Weight
37 g
Note
The Mega 2560 has a resettable polyfuse, If more than 500 mA is applied to the USB port, the fuse will automatically break the connection until the short or overload is removed.
The Mega 2560 can be powered via the USB connection or with an external power supply. The power source is selected automatically.
On Rev1 boards: connecting the solder jumper on the back of the board (near the map of Italy) and then resetting the 8U2.
On Rev2 or later boards: there is a resistor that pulling the 8U2/16U2 HWB line to ground, making it easier to put into DFU mode.
Download the latest Arduino IDE
The open-source Arduino Software (IDE) makes it easy to write code and upload it to the board. This software can be used with any Arduino board.
The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328. 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 cabl
The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs).