Waveshare Photo Interrupter Sensor Module - 6mm Gap, 3.3V/5V Digital Output

The module provides a digital TTL output signal (logic 0 or 1). It features a built-in comparator and Schmitt trigger, which converts the analog signal from the phototransistor into a clean, debounced digital waveform suitable for direct connection to microcontroller GPIO pins like those on Arduino or Raspberry Pi.

The included 20-slot encoder disk is a prototyping accessory. When mounted on a rotating shaft and placed within the sensor's 6mm gap, it creates a rotary encoder system. As the disk spins, the slots interrupt the infrared beam, generating a pulse train on the output that can be counted to determine rotational speed (RPM) or angular position.

Power the module with 3.3V to 5V DC applied to the VCC and GND pins via the supplied 3-pin XH2.54 cable. The signal (OUT) pin provides the digital output. The module draws minimal current. Ensure the object to be detected can physically pass through the 6mm gap between the IR emitter and detector.

No, it is designed to be resistant to ambient light interference. It uses infrared (IR) light for detection, and the receiver is tuned to this specific wavelength. This makes it reliable for use in environments with varying visible light conditions, unlike sensors that rely on visible light.