HC-SR501 PIR motion Sensor Pyroelectric Infrared Module SR501

The HC-SR501 PIR Motion Sensor Module is a passive infrared (PIR) motion detection module designed to detect the movement of humans and animals by sensing changes in infrared radiation. It features adjustable sensitivity, adjustable delay time, and repeatable/non-repeatable trigger modes, making it ideal for security systems, automatic lighting, robotics, home automation, and Arduino projects.

Features

• Passive Infrared (PIR) motion detection
• Operating voltage: 4.5V–20V DC
• Adjustable detection range: 3–7 meters
• Adjustable delay time: 5 seconds to 300 seconds
• Detection angle: Up to 120°
• Digital 3.3V TTL output

Pin Configuration

1. VCC – 4.5V to 20V DC Power Input
2. OUT – Digital Output (HIGH when motion is detected)
3. GND – Ground