Pin Allocation Pin Function Analog 0 Button (select, up, right, down and left) Digital 4 DB4 Digital 5 DB5 Digital 6 DB6 Digital 7 DB7 Digital 8 RS (Data or Signal Display Selection) Digital 9 Enable Digital 10 Backlit Control Arduino LCD Keypad Shield This is a 16×2 LCD and Keypad shield for Arduino Uno, Diecimila, Duemilanove, Freeduino boards, and other Uno sized compatible boards such as the Sparkfun Redboard. Blue Backlight with white words uses 4 Bit Arduino LCD Library Left, Right, Up, Down and Select buttons Screen contrast adjustment Arduino Reset button The board uses different pins to the Arduino example sketches, so to make the display work, use the following sequence of pins when starting the library: LiquidCrystal lcd(8,9,4,5,6,7); The buttons are connected to only one analog input pin through resistors to give a different voltage for each button, thus saving on input/output pins.
