Testing LCD keypad Shield for Arduino

Recently I’ve got an Arduino LCD keypad shield. Haven’t decided yet where will it be used. But why not to plug it to Arduino board and see it working. Shield was originally introduced by DFRobot who has some cool open-source stuff including robotics related. This LCD keypad shield is really cheap and convenient solution for adding 2×16 LCD and 5 push buttons (+1 reset) to Arduino design. LCD here is interfaced using 4-bit mode and occupies 4 (D4), 5 (D5), 6(D6), 7(D7), 8(RS), 9(E) and 10 digital pins. Pin 10 is used to control LCD backlight through transistor key. All five buttons are connected to single Analog pin 0 using resistor based voltage divider. This lets us keep other pins for general use. Shield is designed to work with 5V based boards. Since Arduino already has LCD library implemented in core, it is easy to start using it right away … Continue reading →