An IR Sensor is an electronic device, that emits in order to sense some aspects of the surroundings. An IR sensor can measure the heat of an object as well as detects the motion.These types of sensors measures only infrared radiation.
Active infrared sensors detect the reflected , and thus the shape of the reflectivity of the target detection range is critical . The minimum detection distance which black , white maximum, small objects from a small area , a large area from the Grand .
The output port OUT sensor module can be directly connected to the Microcontroller IO port , you can directly drive a 5V relay,Connection VCC to VCC, GND to GND, OUT to IO.
Each module shipments comparing the threshold voltage has been adjusted by the Potentiometer is good , not exceptional circumstances, do not arbitrarily adjust the Potentiometer. With the screw holes of 3mm , easy fixed installation .