HC-SR501 PIR Motion Sensor with Adjustable Sensitivity & Delay

The HC-SR501 PIR Motion Sensor is a passive infrared module designed to detect human motion by sensing changes in infrared radiation. It provides a digital output of 3.3 V (high) and 0 V (low), with an adjustable sensitivity up to a 6 m sensing distance and a detection angle of 110°. The module operates within a wide voltage range of 4.5–20 V and features adjustable output delay of approximately 2–4 seconds. With a low quiescent current of 50 µA and compact 32 × 24 mm dimensions, it is suitable for low-power electronic systems. Typical applications include security systems, automatic lighting, occupancy detection, and microcontroller-based projects.

• Passive Infrared (PIR) sensing element for human motion detection

• Adjustable sensitivity with maximum sensing distance up to 6 m

• Detection angle of up to 110° for wide area coverage

• Digital output levels of 3.3 V (HIGH) and 0 V (LOW)

• Operating voltage range from 4.5 V to 20 V

• Adjustable output delay time of approximately 2–4 seconds

• Low quiescent current consumption of 50 µA

• Model | HC-SR501

• Sensor Type | Passive Infrared (PIR) Motion Sensor

Electrical:

• Operating Voltage | 4.5–20 V DC

• Output Voltage Level | 3.3 V (HIGH), 0 V (LOW)

• Quiescent Current | 50 µA

Performance:

• Maximum Sensing Distance | Up to 6 m

• Detection Angle | Up to 110°

• Output Delay Time | Adjustable, approximately 2–4 s

• Sensitivity Adjustment | Supported via onboard potentiometer

Mechanical:

• Dimensions | Approximately 32 × 24 mm

• Voltaat Tutorial
• Tutorial from lastminuteengineers.com
• HC-SR501 Datasheet
• biss0001 Datasheet
• 3D model on grabcad.com