The HC-SR501 is a pyroelectric infrared motion sensor module for occupancy detection, lighting control, alarms, automation, and microcontroller projects. The product options include green or blue sensor boards and bracket configurations.
Listed Specifications
- Operating voltage: DC 5-20V.
- Output: approximately 3.3V high level and 0V low level.
- Adjustable delay: approximately 0.3-18 seconds.
- Trigger modes: non-repeatable L mode or repeatable H mode.
- Detection pattern: up to approximately 7m with a cone angle below 120°, depending on mounting and environment.
- Operating temperature: approximately -15°C to 70°C.
- Board dimensions: approximately 32 x 24mm.
Controls and Integration
Use the onboard controls to adjust sensitivity and output delay. H mode keeps extending the output while motion continues; L mode returns low after the set delay. A location is provided for an optional photoresistor when light-dependent triggering is required, but the photoresistor is not fitted unless included in the selected option.
Allow the PIR sensor to stabilize after power-up and keep it away from moving heat sources, direct sunlight, strong airflow, and vibration. Confirm the selected color and bracket package before checkout.
Product Detail Images
