EC Buying 5Pcs HC-SR501 PIR Motion Sensor Module, Passive Infrared Human Detection Board with Adjustable Sensitivity and Delay Time, 3.3V–5V Digital Output for arduino MCU Projects

["This passive infrared sensor module detects changes in infrared radiation caused by movement of people or animals within its sensing range. It converts infrared signal variation into a digital output suitable for motion detection applications.","Adjustable sensitivity and output delay time are provided through onboard potentiometers. Users can configure detection distance and signal duration to match different application requirements and environmental conditions.","Operates with a DC supply voltage from 3.3V to 5V, allowing direct connection to common microcontroller platforms without additional voltage conversion. The digital output can be read directly by GPIO input pins.","Uses a Fresnel lens to enhance detection coverage and improve sensitivity to motion within the field of view. The sensor provides stable operation with low power consumption during standby and active states.","Compact PCB design with clearly labeled VCC, GND, and OUT pins simplifies wiring and installation. Suitable for embedded electronics projects, motion-triggered control systems, and experimental development environments."]