PIR Motion Detection Sensor HC-SR501

Detect motion effortlessly with the HC-SR501 PIR Motion Sensor, a highly sensitive passive infrared module designed to sense human movement in its range. It features a compact build and digital output, making it an ideal solution for automated lighting, security systems, and smart devices.

Built with a pyroelectric sensor and a Fresnel lens, it reliably detects infrared radiation emitted by warm objects. With adjustable delay time and trigger modes, it’s adaptable to a variety of electronics and automation projects—whether you're powering a night light in a hallway or integrating it into a full-fledged alarm system.

Features:

• Sensor Type: Passive Infrared (PIR) / Pyroelectric

• Operating Voltage: 5V–20V DC

• Output: Digital (High: 3.3V, Low: 0V)

• Trigger Modes:

  • H (repeatable) – output stays high with continuous motion

  • L (non-repeatable) – output resets only after delay

• Delay Time: Adjustable (0.3s to 18s)

• Sensing Range: Up to ~7 meters, ~120° cone

• Power Consumption: ~65μA (static)

• Lens Size: 23mm diameter Fresnel lens

Applications:

• Motion-activated lighting

• Security alarms and surveillance

• Smart home automation

• Toys and interactive installations

• Industrial automation triggers

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