... backlight selector switch LCD1602 Keypad Shield v2.0 for Arduino Introduction2010 the latest LCD1602 keypad shield v2.0 ... adjustment knob, the backlight selector switch, 4 direction keys, 1 select keys and a reset button, four sensor analog interfaces , ... APC220 wireless digital communication interface, easy-to-use for independent expansion. For beginners of Arduino, the 1602 LCD Keypad Shield ...