XLX 4PCS HC-SR312 Micro IR Pyroelectric Infrared Sensor Human Body Sensing Module PIR Motion Detector Module High Power High Efficiency Digital Measurement for Arduino Electronic Practice DIY

hello Nana dog see here from how to mechatronics calm in this tutorial we will learn how to use a PIR sensor for detecting motion first let's explain the working principle the module actually consists of a pyroelectric sensor which generates energy when exposed to heat that means when a human or animal body will get in the range of the sensor it will detect the movement because the human or the animal body emits heat energy in a form of infrared radiation that's where the name of the sensor comes from a passive infrared sensor and the term passive means that the sensor is not using any energy for detecting purposes it just works by detecting the energy given off by the other objects the module also consists a specially designed cover named Frenzel lens which focuses the infrared signals onto the pyroelectric sensor okay now let's connect the module to the Arduino board the module has th