HC-SR501 Infrared Human Motion Module is a Passive Infrared (PIR) sensor that detects motion by sensing infrared radiation changes. It is commonly used in security systems, automatic lighting, and smart home applications.
Features:
Motion Detection: Detects human or animal movement within a certain range.
Adjustable Sensitivity: Can modify detection distance (up to ~7 meters).
Delay Time Adjustment: Can set how long the output remains high after motion detection.
Low Power Consumption: Suitable for battery-powered applications.
Wide Voltage Range: Works with 4.5V to 20V DC.
Specifications:
Operating Voltage: 4.5V - 20V DC
Detection Range: 3m - 7m (adjustable)
Detection Angle: ~120° (depends on the lens)
Output Voltage: High (3.3V) when motion detected, Low (0V) when idle
Delay Time: Adjustable from ~0.3s to 5 minutes
Power Consumption: ~50µA (low power mode)
Trigger Modes:
Non-repeatable (Single Trigger): Output goes high, then low after delay, even if motion continues.
Repeatable (Continuous Trigger): Output remains high as long as motion is detected.