SainSmart Mega2560 R3: *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 allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Due for Arduino that operate with 3.3V. The second one is a not connected pin, that is reserved for future purposes.*Stronger RESET circuit.*Atmega 16U2 replace the 8U2 SainSmart 1602 LCD Keypad Shield: *This is a 16x2 LCD Keypad module for Diecimila Duemilanove, UNO, MEGA1280, MEGA2560 board.*Blue Backlight with white words, adjustable backlighting.*4 Bit LCD Library*100% brand new and high quality Package List:1x SainSmart Mega25601x SainSmart 1602 LCD Keypad Shield Buy Separately: SainSmart Mega2560 SainSmart LCD Keypad Shield
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