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

Product Description This module is a passive infrared motion detection sensor based on the HC‑SR501 design. It detects motion by sensing changes in infrared radiation emitted by warm objects moving within its detection area. When motion is detected, the module outputs a digital high-level signal for a configurable duration. Detection sensitivity and output delay time can be adjusted using onboard potentiometers. The module operates on a DC voltage range of 3.3V to 5V and provides a digital output signal compatible with microcontrollers. It is suitable for motion detection experiments, automated control projects, and embedded system development.  Technical Specifications Sensor Type: Passive infrared (PIR) motion sensor Module Model: HC‑SR501 Operating Voltage: DC 3.3V – 5V Output Type: Digital output (High / Low) Detection Distance: Approx. 3m – 7m (adjustable, environment dependent) Detection Angle: Approx. 110° – 120° Delay Time: Adjustable via onboard potentiometer Trigger Mode: Repeatable / Non-repeatable (jumper selectable) Warm‑Up Time: Approx. 30 – 60 seconds Interface Pins: VCC, GND, OUT Lens Type: Fresnel lens PCB Size: Approx. 32mm × 24mm Application: Motion detection and control 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.