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This TCRT1000 Reflective Optical Sensor has an infrared emitter and NPN Phototransistor all in one package. When the sensor is in front of a reflective surface, the emitted IR beam makes it to the internal phototransistor and closes the circuit. Its compact design and easy integration make it perfect for robotics, automation, and interactive projects.
This Optical Detector / Phototransistor uses reflected IR beams to measure the distance of an object in front of the sensor (0.2 - 4 mm) or how reflective it is. Useful for detecting the black or white surfaces or whether an object passes in front of the sensor in close range. The left 2 pins are the infrared emitter LED and the right 2 pins are the legs of the phototransistor. When the infrared beam emitted from the internal IR LED bounce off a surface and onto the phototransistor, the phototransistor pins become connected.
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