HC-SR501 PIR Motion Sensor Module

HC-SR501 PIR Passive Infrared Motion Detector Module

The HC-SR501 module detects infrared radiation emitted by warm human or animal bodies. Featuring a segmented Fresnel lens and dual-element pyroelectric sensor, it provides adjustable trigger sensitivity, delay timing, and selectable repeatable/single trigger modes.

Specifications

• Detection Range: 3 to 7 meters (adjustable via onboard trimmer)
• Detection Angle: < 120° cone angle
• Delay Time: 0.3 seconds to 5 minutes (adjustable)
• Trigger Modes: L (unrepeatable trigger) and H (repeatable trigger)
• Operating Voltage: 4.5V to 20V DC (outputs 3.3V TTL High on motion)
• Quiescent Current: < 50 μA (battery friendly)