Description
The Passive Infrared (PIR) sensor is a reliable electronic module that detects motion by measuring sudden changes in the infrared radiation emitted by warm objects passing through its field of view. Widely used in home automation and security-focused STEM projects, it is ideal for building burglar alarms, automated room lighting systems, and motion-triggered robotic behaviours. The module typically features adjustable sensitivity and time-delay dials for fine-tuning its response. It interfaces seamlessly with microcontrollers such as the Arduino UNO and Magic Board via a simple digital output pin, making it an excellent, accessible component for teaching students about digital logic and environmental sensing.
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