Arduino Mega 2560 R3 clone (Ch340)

Mega is an ATmega2560 (Use CH340 Driver) to the core of the microcontroller development board itself has 54 groups digital I / O input / output terminal (14 group do PWM output), more than 16 sets of analog inputs, 4 UART (hardware serial ports ), using the 16 MHz crystal oscillator. Due bootloader, so the program can be downloaded directly via USB without passing other external programmer. Most choose to supply power directly supplied by USB, or use the AC-to-DC adapter and battery as an external power supply.

Power Design

Mega power supply system has two choices, USB direct power supply or external power supply. Select the power supply will be automatically switched. External power supply optional AC-to-DC adapter or battery, the control panel limit voltage range of 6V ~ 12V, but if the supplied voltage is less than 6V, I / O port may not be supplied to the 5V voltage, so there will be no stable; if the supplied voltage is greater than 12V, the regulator will have the device may overheat protection, are more likely to damage MEGA. Therefore, the operation of the proposed power supply 6.5 ~ 12V, recommended power supply is 7V or 12V.