Arduino Mega ADK Development Board

Arduino Mega ADK is a microcontroller board based on the ATmega2560.

FEATURES Arduino Mega ADK

• The Arduino MEGA ADK is a microcontroller board based on the ATmega2560.
• It has a USB host interface to connect with Android based phones, based on the MAX3421e IC.
• 54 digital input/output pins (of which 15 are 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.

POWER Arduino Mega ADK

powered via the USB connection or with an external power supply.

The power source is selected automatically.

External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery.

The adapter can be connected by plugging a 2.1mm center-positive plug into the board’s power jack.

Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector.

The power pins are as follows:

• VIN. The input voltage to the Arduino board when it’s using an external power source (as opposed to 5 volts from the USB connection or other regulated power source).
• You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
• 5V. This pin outputs a regulated 5V from the regulator on the board.
•  DC power jack (7 – 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don’t advise it.
• 3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.
• GND. Ground pins.
• IOREF. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.

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