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The PIR Motion Sensor Module HC-SR501 is a highly sensitive infrared sensor designed to detect human movement within its range. It uses passive infrared (PIR) technology to pick up infrared radiation emitted by objects, particularly human bodies. Ideal for security systems, automation projects, and lighting control, this module operates with low power consumption and features configurable delay and trigger settings.
🔧 Key Features
- Automatic motion detection using passive infrared technology
- Photo-resistor control for light-sensitive activation
- Configurable induction blocking time and sensitivity
- Supports two trigger modes (retriggerable and non-retriggerable)
- High-level TTL output for easy integration with microcontrollers
- Low static power consumption for energy-efficient applications
- Wide operating voltage range from 4.5V to 20V DC
📐 Technical Specifications
| Product Name | PIR Motion Sensor Module HC-SR501 |
| Operating Voltage | DC 4.5V to 20V |
| Output Type | Digital High-Level (TTL) |
| Detection Angle | Up to 120° |
| Detection Range | 3–7 meters (adjustable) |
| Delay Time | Adjustable (0.3 – 300 seconds) |
| Trigger Modes | Repeatable (H) / Non-repeatable (L) |
| Static Power | < 60 µA |
| Module Dimensions | 32mm × 24mm × 18mm |
📌 Applications
- Automatic lighting control systems
- Security and intrusion detection
- Smart home automation
- Human presence detection for energy saving
- Robotics and motion-triggered operations
💡 Why Choose the HC-SR501 PIR Motion Sensor?
This sensor is a cost-effective and reliable choice for motion sensing in DIY, educational, and commercial projects. With its wide voltage range, adjustable delay, and dual trigger modes, it offers flexibility and easy integration with microcontrollers such as Arduino and Raspberry Pi.
📦 Package Includes
- 1 × PIR Motion Sensor Module HC-SR501
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