How to use IR Sensor with Arduino

This video discusses how to use theIR Sensor module with Arduino.

An infrared (IR) sensor is an electronic device that measures and detects infrared radiation in its surrounding environment.... When an object comes close to the sensor, the infrared light from the LED reflects off of the object and is detected by the receiver.

Where is theIR sensor used?

IR sensors are now widely used in motion detectors, which are used in building services to switch on lamps or in alarm systems to detect unwelcome guests. In a defined angle range, the sensor elements detect the heat radiation (infrared radiation) that changes over time and space due to the movement of people.