Counter module for motor speed sensor

1. using slot type optocoupler sensor
2. The groove width is 5mm.
3. There is an output status indicator, the output high level light is off, and the output low level light is on.
4, there is occlusion, output high level; no occlusion, output low level.
5, the comparator output, the signal is clean, the waveform is good, the driving ability is strong, more than 15mA.
6, working voltage 3.3V-5V
7, output form: digital switch output (0 and 1)
8, with fixed bolt holes for easy installation
9, small board PCB size: 3.2cm x 1.4cm
10. Use wide voltage LM393 comparator