The Due is Arduino's first ARM-based Arduino development board. This board is based on a powerful 32bit CortexM3 ARM microcontroller made programmable through the familiar Arduino IDE. It increases the computing power available to Arduino users keeping the language as compatible as possible so that many programs will be migrated in a matter of minutes!

The Iduino Due has 54 digital input/output pins (of which 12 can be used as PWM outputs), 12 analog inputs, 4 UARTs (hardware serial ports), an 84 MHz clock, a USB-OTG capable connection, 2 DAC (digital to analog), 2 TWI, a power jack, an SPI header, a JTAG header, a reset button and an erase button. There are also some cool features like DACs, Audio, DMA , an experimental multi tasking library and more.

To compile code for the ARM processor, you'll need the latest version of the Arduino IDE: v1.5 (After a period of testing and debugging this will replace the 1.0.1 IDE altogether)

Warning: Unlike other Iduino boards, the Iduino Due board runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Providing higher voltages, like 5V to an I/O pin could damage the board.

3.Why should I use RAMPS-FD instead od RAMPS1.4

Campare Ramps-FD with Ramps1.4,the Improvements of Ramps-FD are below

-The RAMPS-FD has other hardware protection, through the jumper cap control motor drive IC

-The RAMPS-FD Much more than Ramps1.4 2-way PWM

-The RAMPS-FD has Larger driving power than Ramps1.4

- The RAMPS-FD 'POWER has two choices：12v and 24v

4.Why should I select Arduino DUE instead of Arduino Mega

-DUE has lower power ，computing faster and flash，sram bigger than mega2560

- CPU operates at 3.3V

- High-current IO pins are capable of 15 mA source, 9 mA sink

-Low-current IO pins capable of 3 mA source, 6 mA sink

- CPU package has an absolute max of 130mA

-The Due has 1 dedicated SPI port, and 4 multipurpose USART/SPI ports.The SPI port is only routed to the 6 pin header used for ICSP on Mega, but this is not used for ICSP on Due.

-The Due does not have any EEPROM