So we suggest the power supply should be 6.5~12V in operation and recommended supply is 7.5 or 9V. Voltage input of this control board is 6V~12V, but if the supplied voltage is greater than 12V, the voltage stabilizing device will be likely to be overheated to damage Arduino MEGA. External power supply can be AC-to-DC adapter or battery. There are two choices (direct power supply trough USB or external power supply) for the power supply system of Arduino Mega, and they can be automatically switched. This gives your projects plenty of room and opportunities. With 54 digital I/O pins, 16 analog inputs and a larger space for your sketch, it is the recommended board for 3D printers and robotics projects. The MEGA 2560 is designed for more complex projects. Instead, it features the Atmega16U2 programmed as a USB-to-serial converter. The 2560 R3 differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. The Mega 2560 board is compatible with most shields designed for the Uno. Just simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. With its bootloader, program can be downloaded directly with USB and you don’t need to use other external programmer. It contains everything needed to support the microcontroller. 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, 2 ICSP headers, and a reset button. Keyestudio Mega 2560 R3 is a microcontroller board based on the ATMEGA2560-16AU, fully compatible with ARDUINO MEGA 2560 REV3. 8.1.3 Introduction for Arduino IDE Toolbar.8.1 Step1 | Download the Arduino environment (IDE).
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