PIR Motion Sensor Detector Module HC-SR501

HC-SR501 PIR Motion Sensor Module detects human motion using infrared radiation. Ideal for smart lighting, security alarms, and Arduino-based motion detection systems.

Technical Specifications:

1. Operating Voltage: 4.5V – 20V DC
2. Output Type: Digital (HIGH/LOW)
3. Sensing Range: 3m – 7m (adjustable)
4. Delay Time: 5s – 5min (adjustable)
5. Detection Angle: ≤ 120°
6. Quiescent Current: < 50 µA
7. Trigger Modes:
   • Non-repeatable (H): Output stays HIGH until delay ends
   • Repeatable (L): Output stays HIGH while motion is detected
8. PCB Dimensions: 32mm × 24mm × 25mm
9. Operating Temperature: -15°C to +70°C

The HC-SR501 PIR (Passive Infrared) Motion Sensor Module is a widely used and reliable motion detection sensor that identifies human presence by detecting infrared radiation emitted by the human body.

It features a dual-element pyroelectric infrared sensor and a built-in lens that detects motion within a range of up to 7 meters. The onboard adjustable potentiometers allow control of both sensitivity and delay time, making it versatile for different applications.

This module outputs a digital HIGH signal when motion is detected and LOW when idle. It is commonly used in smart home systems, automatic lighting, and security alarms, and works seamlessly with Arduino, ESP32, NodeMCU, and Raspberry Pi microcontrollers.

🧠 Features:

1. Detects human motion using infrared radiation

2. Adjustable detection range and delay time

3. Dual trigger modes for flexible applications

4. High sensitivity with low power consumption

5. Simple 3-pin interface for easy integration

6. Compatible with Arduino, ESP32, and Raspberry Pi

📦 Applications:

1. Motion-activated lighting systems
2. Security alarm and intrusion detection
3. Smart home automation
4. Energy-saving lighting control
5. Human presence monitoring in offices and rooms