It is really important to note that when using an external power supply, the voltage should not exceed the maximum voltage range of the board to avoid damaging the microcontroller. The voltage range for this method is 4.5-5.5V DC. Power Pins: It's even possible to power the board by an external power supply connected to the 5V pin.The voltage range for this method is 7-12V DC. VIN Pin: The board can also be powered by an external power supply connected to the VIN pin.External Power Supply: The board can also be powered by an external power supply connected to the DC jack.This is the most common method of powering the board during development. USB type B: The board can be powered by connecting it to a computer via the USB type B connector.The power supply options for the Arduino Mega ADK are: It has a voltage regulator on board that converts the input voltage to the appropriate voltage for the microcontroller. The board can be powered through the USB Type B connector or an external power supply. The Arduino Mega ADK's microcontroller (ATmega2560) can handle the maximum voltage of 5.5V DC. LEDs: The board utilizes several LEDs, including a power LED, a pin 13 LED, and a RX and TX LEDs which indicate when data is being transmitted or received.Power Jack: The board has a 2.1 mm center-positive power jack, which can be used for connecting an external power supply, such as a battery or wall adapter. ![]() In those scenarios the board acts as the USB host. The other is USB type A connector that can be used to connect other USB devices to the board. One USB type B which can be used for programming the board and for providing power to the board.
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