The PIR (Passive Infrared) Sensor Module is a highly effective motion detection device that senses changes in infrared radiation emitted by objects, typically human bodies, moving within its detection range. This makes it ideal for applications such as motion sensing, security systems, and automatic lighting control.
The module uses a Pyroelectric sensor to detect infrared radiation, which varies when a person or object moves in front of it. It provides a digital output that switches from LOW to HIGH when motion is detected, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, or ESP32. The module typically operates within a range of 3 to 7 meters and can be powered by 5V DC.
The PIR sensor includes a built-in lens that enhances detection sensitivity and can be adjusted using the onboard potentiometer to change the sensor's sensitivity and delay time. It has a wide detection angle of about 120°, covering a large area for motion detection.
Perfect for applications like security alarm systems, automatic lighting, and human presence detection, the PIR Sensor Module offers a reliable, cost-effective solution for motion sensing with minimal power consumption.