SainSmart Mega2560 R3 ATmega2560-16AU + ATMEGA16U2 + USB Cable for Robot Arduino UNO MEGA2560 R3 Duemilanove 2013 Specifications: This is new SainSmart MEGA2560 R3. It now uses an ATMega16U2 instead of the ATMega8U2 chip, which allows for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc. The new MEGA2560 R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The MEGA2560 R3 works with all existing shields but can adapt to new shields which use these additional pins. New Features : 1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that al...