Description
The HC-SR505 PIR Motion Sensor is a compact, low-power infrared motion detector designed to accurately sense human presence and movement. It operates by detecting changes in infrared radiation emitted by warm objects such as the human body. When motion is detected, the sensor outputs a digital HIGH signal, making it easy to interface with microcontrollers and control systems.
With its small size, high sensitivity, and built-in timing control, the HC-SR505 is ideal for motion-activated applications in smart electronics, embedded systems, and IoT projects.
Key Features
- Miniature Size: Ultra-compact design suitable for space-constrained projects
- Low Power Consumption: Ideal for battery-powered and always-on applications
- Digital Output Signal: Outputs HIGH when motion is detected
- Wide Operating Voltage Range: Compatible with various power sources
- Fixed Delay Time: Approximately 8 seconds delay after motion detection
- Repeatable Trigger Mode: Continuous detection while motion persists
- Wide Detection Coverage: Up to 3 meters with a 100° field of view
- High Sensitivity & Reliability: Stable performance with automatic control
Specification
- Operating Voltage: 4.5V – 20V DC
- Quiescent Current: < 60 µA
- Detection Range: Up to 3 meters
- Detection Angle: < 100° cone angle
- Output Delay Time: ~8 seconds (±30%)
- Operating Temperature: -20°C to +80°C
- Interface: 3-pin (VCC, OUT, GND)
- Dimensions: 23 mm × 10 mm
- Weight: ~5 g
Application
- Motion-activated lighting systems
- Smart home automation (lights, alarms, door systems)
- Security and surveillance devices
- Industrial automation and control systems
- Occupancy detection and monitoring
- Automatic power control for electrical equipment
- DIY electronics and IoT projects