Basic knowledge of LCD keypad shield

The LCD keypad shield can connect directly to the Arduino Diecimila Duemilanove, UNO, MEGA1280,and MEGA2560 board. The LCD panel displays characters in white with a blue backlit and can display up to two lines of 16 characters.


The features of sainsmart LCD keypad shield:

This is a 16x2 LCD Keypad shield which can fit for Arduino Diecimila Duemilanove, UNO, MEGA1280,and MEGA2560 board.

Blue Backlight with white words, adjustable backlighting.

5V operating voltage

5 button keypad – up, down, left, right, and select which leaves the other analog inputs free for you to use in your projects.The buttons are arranged in a handy pattern and referred to as UP, DOWN, LEFT, RIGHT, and SELECT, but of course it's totally up to your sketch to decide what to do when any particular button is pressed.

It can work perfectly in 4-bit mode with the "LiquidCrystal" library included with the Arduino IDE, which allows you to control the LCD with a total of just 6 digital I/O lines. We've deliberately picked D4-D9 so that it doesn't interfere with pins required by other popular products such as the Ethernet Shield and EtherTen, so you can stack this on top of other shields to give you a local display.