Seeed Studio Digital Distance Interrupter

Grove - Digital Distance Interrupter 0.5 to 5cm is an infrared proximity sensor module based on GP2Y0D805Z0F. Normaly the output of this sensor is 1(High), when the object enters the measurement range of the sensor, it will be triggered and output a 0(LOW).At the same time the on-board LED will light up. As the name suggests, the measurement range is from 0.5cm to 5cm.