Motor Test IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module

The OUT port of the speed measuring module is linked to the external interrupt port of the MCU, and whenever there is infrared ray conduction, it is an external buffer.
When VCC and GND are connected, the module signal indicator will be on. When there is no block in the module slot, the receiving tube is turned on, and the module OUT outputs a high level. When blocking, the OUT output is low and the signal indicator is off. The module OUT can be connected to a relay to form a limit switch or the like, and can also be connected to the active buzzer module to form an alarm. The OUT output interface can be directly connected to the IO port of the MCU. Generally, it is connected to an external interrupt to detect whether the sensor has occlusion. For example, the motor code wheel can detect the motor speed.
Logical design
Measuring distance:
The speed sensor output is a pulse signal, one pulse is interrupted once; the infrared ray is low when it is turned on, so we set the interrupt to the low level trigger mode. There are integer grids on the general code wheel. No matter how many grids are in principle, for example, 10 grids, that is, there are 10 spaces. After the motor turns one turn, the ray is turned on 10 times, and the extern