Waveshare Photo Interrupter Sensor, Speed Measuring

Overview 1. Infrared detection, eliminating the interferences of external stray light 2. Schmitt trigger, stable wave form and signals 3. Signal output indicator (while breaking the beam, outputs low level, the indicator lights up) Specifications 1. Power: 3.3V ~ 5V 2. Dimension: 26.8mm × 15mm × 18.7mm 3. Mounting holes size: 3mm 4. Gap width: 6mm Applications - Motor speed detection - Pulse counter How to Use In the case of working with a MCU: - VCC ? 3.3V ~ 5V - GND ? GND - DOUT ? MCU.IO (digital output)