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Connect VCC and GND, the module signal indicator will light up. When there is no obstruction in the module slot, the receiving tube is turned on, and the module OUT outputs a high level; when blocked, OUT outputs a low level and the signal indicator goes out
The module OUT can be connected to a relay to form a limit switch and other functions, or it can be connected to an active buzzer module to form an alarm
The OUT output interface can be directly connected to the IO port of the microcontroller, generally connected to an external interrupt to detect whether the sensor is blocked. If a motor encoder is used, the motor speed can be detected
Program design: The OUT port of the speed measurement module is connected to the external interrupt port of the MCU. Whenever an infrared ray is turned on, it is an external buffer