arduino › sensor module
generic HC-SR501 Adjustable PIR Motion
Output is 3.3V regardless of supply — safe for ESP32/Pico. Two trim pots: sensitivity and re-trigger time. Settles ~30 seconds after power-on; ignore the first reading.
Specifications
- interface
- digital
- voltage v
- 5v_to_20v
- library arduino
- none (digitalRead)
- accuracy
- binary motion
- range
- 3-7m, 110deg cone
- pin count
- 3
Sources
- SparkFun open product catalog · ingest 2026-05-06