This kind of correspondence match exactly the same with our sensors, making it even cooler and more user-friendly.

The R3 board enjoys following new features:



Added SDA and SCL pins that are close to AREF pin and two other new pins close to RESET pin, allowing voltage adaptation

with IOREF. Our shields will be fully compatible both with the AVR boards operating @5V and Due @3.3V in future.



Improved RESET circuit



Replacing the Atmega 8U2 with Atmega 16U2 (datasheet) http://www.atmel.com/images/7799s.pdf

Version history:



V3.1 - Choose the quartz crystals resonator to improve the timer and serial accuracy. Compared with ceramic crystals, quartz crystals get

better temperature stability.

 

SPECIFICATION



Compatible with Arduino Mega 2560 R3



Microcontroller: ATmega2560



Operating Voltage: 5V



Input Voltage (recommended): 7 ~ 12V



Digital I/O Pins: 54 (of which 14 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

The Mega is compatible with:



Mega Prototyping Shield For Arduino Mega



Mega IO Expansion Shield V2.3 For Arduino Mega



Mega-multi Expansion Shield



LCD Keypad Shield For Arduino



2A Motor Shield for Arduino



Stepper Motor Driver Shield for Arduino



Screw Shield V3 for Arduino



Xbee Shield



DFRduino Ethernet Shield (Support Mega and SD)



Relay Shield for Arduino V2.1