Slot Type IR Optocoupler Speed Sensor Module LM393

1. Operating Voltage: 3.3V-5V
2. Small PCB Board Size: 3.2cm*1.4cm
3. Use groove coupler sensor, slot width 5mm.
4. The output format: digital switching output (0 and 1)
5. Use a wide voltage LM393 comparator

Product wiring instructions:
1. VCC: positive power supply 3.3-5V
2. GND: power supply is negative
3. DO: TTL switching signal output
4. AO: this module does not work