The HC-SR501 PIR (Passive Infrared) Motion Sensor Module is a reliable and widely used human-motion detection unit that identifies movement through changes in infrared radiation. Its dual-element sensing system detects body heat and motion within a configurable range, making it ideal for security, lighting control, and automation systems. With adjustable sensitivity and time delay, the module offers flexibility and high stability in both indoor and outdoor settings. FEATURES Adjustable detection range and trigger delay. Wide detection angle and fast response. Built-in Fresnel lens for enhanced sensitivity. Digital output for microcontroller or relay control. Compact, energy-efficient design. APPLICATIONS Intrusion and motion detection systems Smart lighting and power management Automated entry systems Energy-saving devices