Arduino LCD Keypad Shield, Great For Your Next Arduino Uno or Leonardo Project

This is a very popular LCD Keypad shield for Arduino or Freeduino board. It includes a 2x16 LCD display and 6 momentary push buttons. Pins 4, 5, 6, 7, 8, 9 and 10 are used to interface with the LCD. Analog Pin 0 is used to read the pushbuttons. The LCD shield supports contrast adjustment and backlit on/off functions. It also expands analog pins for easy analog sensor reading and display.

    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. Reading the buttons is easy and example code is shown below

Pin Connections

 
Pin    Function
Analog 0    Buttons (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
LOW = Backlight on
HIGH = Backlight off
Use PWM signal to control brightness


The board is a little bigger than an Arduino UNO (measuring 8cm x 6cm).