... switch LCD1602 Keypad Shield v2.0 for Arduino Introduction2010 the latest LCD1602 keypad shield v2.0 for Arduino collect ... not only has the contrast adjustment knob, the backlight selector switch, 4 direction keys, 1 select keys and a reset button, four sensor analog ... controller directly , a 3p sensor connecting line to connect, the sensor data records will be displayed easily. Immersion gold process ...