Automate your lighting systems and build robust security alarms with the highly popular HC-SR501 PIR Motion Sensor Module. Crowned with a distinctive white Fresnel lens dome, this compact board detects motion by sensing variations in ambient infrared radiation emitted by moving warm bodies. Operating completely independently of ambient light, it features dual onboard potentiometers to manually tune both sensor sensitivity and holding time. It is the ideal, low-cost choice for motion-activated home automation corridors, anti-theft alarms, and custom microcontroller triggers.Â
Key Product Features
- Dual Fine-Tuning Potentiometers: Includes manual dials to adjust detection range from 3 to 7 meters and output delay hold times from 5 to 300 seconds.Â
- Adjustable Jumper Triggers: Features a physical header clip to choose between Single Trigger (L) or Repeatable Trigger (H) modes to match custom scripting logics.Â
- Universal Voltage Headroom: Natively accepts wide DC power supplies ranging from 4.5V to 20V, while pushing out safe, standard 3.3V TTL logic data signals.Â
- Ultra-Low Idle Current Draw: Sips less than 60µA of standby power, making it an energy-efficient peripheral for battery-operated remote nodes.Â
- Wide Detection Aperture: The engineered dome layout focuses light arrays to deliver an expansive 120 to 140-degree cone field of view.

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