This is Arduino compatible R3 Mega 2560 ATmega 2560-16AU control board without USB (Universal Serial Bus) cable Arduino Mega is an ATmega 2560 as core microcontroller development board itself has 54 groups digital I / O input / output terminal (14 groups do PWM outputs) 16 sets of simulation than the input side, group 4 UARTs (hardware serial ports) using the 16 MHz crystal oscillator. With the bootloader, download the program directly via USB (Universal Serial Bus) without having to go through other external writer. Supply part of the optional USB (Universal Serial Bus) power, or as an external power using the AC-to-DC adapter & battery. Rapid growth due to open the original code, as well as the concept of using Java (cross-platform) C language development environment for Arduino peripheral module. The main reason attracted Artist Arduino can quickly use the Arduino language with Flash or Processing.. . software communication, to make multimedia interactive works. Arduino development IDE interface is based on open-source principles, means that you can free download for use in project work, school teaching, motor control, interactive works. Power supply design There are two options for the power supply system of the Arduino Mega USB (Universal Serial Bus) direct power supply or external power supply. The choice of power supply will be switched automatically. External supply AC-to-DC adapter or the battery can be selected on this control panel. Limit the voltage range of 6V ~~ 12V, but if the voltage supplied is less than 6V, I / O port may not be supplied to a voltage of