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:

⚙️ Applications:

• Motion-activated lighting systems

• Home and office security alarms

• Automatic door opening systems

• Human presence detection in robotics

• Smart home and IoT devices

• Energy-saving lighting systems

• Industrial motion monitoring

⚠️ 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

• Explore Arduino and Accessories

• Shop Electronics Components

• Find more IoT and Smart Solutions

🧩 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.