Seeed Studio Studio Grove IR Distance Interrupter v1.2 Sensor - 5V Digital Output

The sensor is designed to operate at a nominal 5V DC. It is not recommended to exceed this voltage, as it may damage the integrated ITR9909 photo-reflector and the onboard signal conditioning circuitry. For use with 3.3V logic systems, ensure the output high signal is compatible or use a level shifter.

Turn the onboard potentiometer with a small screwdriver to adjust the detection threshold. The range (approximately 90mm to 300mm on a white surface) is affected by the reflectivity and color of the target object. Dark, non-reflective surfaces will have a shorter effective range. Calibrate the potentiometer with your specific target material at the desired distance for optimal performance.

Connect the module to your Arduino using the supplied 4-pin Grove cable. Plug the cable into any Grove-compatible shield's digital port (e.g., D2). The sensor outputs a simple digital HIGH or LOW signal. In your Arduino sketch, use `digitalRead()` on the corresponding pin to determine if an object is detected, based on the configured output logic.

The sensor's output state is determined by the reflected infrared intensity relative to the potentiometer-set threshold. By default, a reflective surface (like white paper) within range causes high reflection, which typically results in a LOW output. You can effectively 'invert' the logic in software by checking for a LOW signal as a 'detect' condition, or by physically adjusting the potentiometer until the LED indicator behaves as desired for your specific target.