... 3, backlight, power indicator, contrast control potentiometer I2C/TWI LCD1602 Module Introduction2013 latest IIC LCD1602 ... LCD, contrast control knob, backlight selector switch and IIC communication interface. For beginners, ... potentiometer, backlight selector switch4, concise design, connected with 4p sensor cable Contrast control knobBacklight selector switch IIC communication intefaceConnected with ...