Photo Interrupter Sensor is a sensor module based on ITR9608 photoelectric switch together with special Arduino shield in use.It has been widely used in parts counting motor speed and so on. Three pins electronic building blocks interface input 5V - GND S for digital signal output; Use ITR9608 photoelectric switch with a built-in infrared emitting tube and a receiving tube; With signal LED: a signal indicator. (when there are objects standing in the middle of the groove ITR9608 photoelectric switches the signal LED is off); Operating voltage: DC 5.0V; Power supply needs: 5V; Interface type: Digital; Pin Definition: 1-Signal 2-VCC 3-GND; Fast response and High sensitivity; Simple drive circuit; Stable and long life