The LCD and Keypad Shield gives you a handy 16-character by 2-line display, 5 buttons and a controllable backlight, plug it straight in on top of your Arduino board or other project shields. The display is set behind the shield for a low profile fitment and nice look and we've included panel mounting screw holes in the corners.
Want to change your LCD contrast for a certain look, different temperatures or voltages? Here's Freetronics tutorial on LCD Contrast and Brightness
It's great when you want to build a stand-alone project with its own user interface that doesn't require a computer attached to send commands to your Arduino.
Works perfectly in 4-bit mode with the "LiquidCrystal" library included with the Arduino IDE, allowing 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.
The buttons provide "left", "right", "up", "down", and "select" while using just one analog input. That leaves the other analog inputs free for you to use in your projects. If mounting the shield in an enclosure with a metal faceplate, ensure the buttons are insulated from the faceplate.
The LCD backlight is connected to D3 and can be controlled for on/off, brightness and flashing effects. Please note that this is a 5V shield and not suitable for 3.3V boards.
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