Arduino Mega ADK R3 (Orginal)

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. 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, an ICSP header, and a reset button.
The MEGA ADK is based on the Mega 2560.
Similar to the Mega 2560 and Uno, it features an ATmega8U2 programmed as a USB-to-serial converter.
Revision 2 of the Mega ADK board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode.

Microcontroller 		ATmega2560
Operating Voltage 		5V
Input Voltage (recommended) 	7-12V
Input Voltage (limits) 	6-20V
Digital I/O Pins 		54 (of which 15 provide PWM output)
Analog Input Pins 		16
DC Current per I/O Pin 	40 mA
DC Current for 3.3V Pin 	50 mA
Flash Memory 		256 KB of which 8 KB used by bootloader
SRAM 			8 KB
EEPROM 		4 KB
Clock Speed 		16 MHz
USB Host Chip 		MAX3421E
Length 			101.52 mm
Width 			53.3 mm
Weight 			36 g

For More Details on PC Click here

For More Details on Portables Click here.