2WD car counter and tracing module

The module is intelligent car speed measurement module! It adopts groove-type photoelectric correlation and can be triggered once the non-transparent object passes through the groove. It is equipped with schmitt trigger to eliminate vibrating pulse. It can be applied to distance measurement as well as rotate speed measurement of cars!  The four pins are defined as GND OUT1 OUT2, among them, OUT1 OUT2 +5 is level output! Direct connection to microcontroller IO port. Each channel carries a LED indicating its output status