HC-SR501 HC SR501 PIR Human Motion Infrared Detector Sensor Module

The HC-SR501 PIR Motion Sensor Module is a highly reliable infrared motion detector that detects human presence through passive infrared (PIR) technology. It offers adjustable sensitivity, delay time, and trigger selection, making it ideal for Arduino, Raspberry Pi, and IoT-based motion detection systems.

HC-SR501 PIR Human Motion Infrared Detector Sensor Module

The HC-SR501 PIR Human Motion Infrared Detector Sensor Module is one of the most popular and efficient motion detection sensors used in electronic, automation, and IoT projects. It utilizes passive infrared (PIR) technology to sense changes in infrared radiation caused by human movement within its detection range.

With high sensitivity and low power consumption, this module is perfect for security systems, automatic lighting, robotics, and smart home automation. The onboard adjustable potentiometers allow easy tuning of sensitivity and delay time, while the dual trigger mode (single/repeat) ensures flexibility in application.

Compatible with Arduino, Raspberry Pi, and various microcontrollers, the HC-SR501 provides digital output signals that can easily interface with control systems or relays to automate responses.

⚙️ Key Features:

✅ PIR sensor for human motion detection
✅ Adjustable sensitivity and delay time
✅ Wide detection angle and range
✅ Low power consumption and stable performance
✅ Dual trigger mode: Single / Repeatable
✅ Compatible with Arduino, Raspberry Pi, and ESP8266
✅ Ideal for DIY security, smart lighting, and IoT projects

🔧 Technical Specifications:

Parameter	Description
Model:	HC-SR501
Operating Voltage:	4.5V – 20V DC
Current Consumption:	<50µA
Detection Range:	3 – 7 meters (adjustable)
Sensing Angle:	< 120°
Output Type:	Digital (High/Low)
Trigger Modes:	Single Trigger / Repeatable Trigger
Delay Time:	Adjustable (5s – 5 min)
Operating Temperature:	-15°C to +70°C
Dimensions:	32mm × 24mm

⚙️ Applications:

⚠️ Precautions:

Allow 30–60 seconds for sensor stabilization after power-up.
Avoid direct sunlight and airflow exposure for accurate readings.
Do not block the sensor dome (Fresnel lens).
Mount at an appropriate height (1.5–2.5 meters) for optimal detection.

🎥 Tutorial & Resources:

📺 YouTube Tutorial: How to Use HC-SR501 PIR Sensor with Arduino
📘 Project Guide: PIR Motion Detection with Arduino – Instructables

🔗 Internal Links:

Browse all Sensors Modules
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Shop Electronics Components
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🧩 Product Summary:

The HC-SR501 PIR Motion Sensor Module is a cost-effective, versatile, and accurate infrared motion detector designed for both DIY and professional projects. With easy integration into Arduino and Raspberry Pi systems, it’s perfect for home security, automation, and IoT-based motion sensing. Its adjustable delay and sensitivity make it an essential component for intelligent electronic systems.