If the object is close, the reflected light will be stronger, if the object is far away, the reflected light will be weaker. This light propagates through the air and hits an object, after that the light gets reflected in the photodiode sensor. In the transmitter section, IR led is used and in the receiver section, a photodiode is used to receive infrared signal and after some signal processing and conditioning, you will get the output.Īn IR proximity sensor works by applying a voltage to the onboard Infrared Light Emitting Diode which in turn emits infrared light. The working of the IR sensor module is very simple, it consists of two main components: the first is the IR transmitter section and the second is the IR receiver section. How Does an IR Motion Sensor Module Work? GND Should be connected to the ground of the Arduino. LOW indicates no motion is detected HIGH means motion is detected. VCC is the power supply pin for the IR sensor which we connect to the 5V pin on the Arduino.
The IR sensor has a 3-pin connector that interfaces it to the outside world. This sensor is very common in the electronic industry and if you’ve ever tried to design an obstacle avoidance robot or any other proximity detection-based system, chances are you already know about this module, and if you don’t, then follow this article as here we will discuss everything about it. As this is a passive sensor, it can only measure infrared radiation. An infrared proximity sensor or IR Sensor is an electronic device that emits infrared lights to sense some aspect of the surroundings and can be employed to detect the motion of an object.
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