E18-D80NK Adjustable Infrared Proximity Sensor Switch 3–80cm - Diffuse Reflective, Digital Output, 1m Cable

The sensor features a built-in potentiometer, typically accessed through a small hole in the housing. Use a small screwdriver to turn the pot while testing with a target object at your desired distance. Clockwise rotation generally increases sensitivity and detection range, while counter-clockwise decreases it.

Wire the red or brown wire to your positive supply voltage (3-36V DC), the green or blue wire to ground (GND), and the yellow or black wire to your microcontroller's digital input pin. The output is digital TTL: it stays HIGH (near Vcc) when no object is detected and switches LOW (near 0V) when an object is within the set range.

Yes. The sensor's wide 3-36V operating voltage range covers both 3.3V and 5V logic systems. The digital output signal will correspond to the supply voltage you provide. If you power it with 5V, ensure your microcontroller's input pin is 5V-tolerant if it's a 3.3V device like a Raspberry Pi.

Diffuse reflective means the sensor's infrared emitter and receiver are housed together. It detects objects by reading the scattered IR light reflected off the target's surface. This is different from through-beam or retro-reflective types. It's suitable for detecting non-shiny objects but range and accuracy can be affected by the object's color and texture.