Geeetech Keypad LCD 1602 V3 Display For Arduino Mega2560 UNO R3 Raspberry Pi This is a 16x2 LCD Keypad module for ARDUINO / Arduino Diecimila Duemilanove board. Uses HD44780 Yellow 1602 LCD, uses 4 Bit Arduino LCD Library. To preserve the SPI port for future use, the Digital IO pins DB7-10 and pin11 & pin 12 used in the original LCD4Bit library have been moved to DB4-7 and pin 8 & pin 9 respectively