Description
The HC-SR505 Mini PIR Motion Sensor is a compact, low-power passive infrared (PIR) module designed for reliable human motion detection. Its small footprint and simple digital output make it ideal for educational laboratories, prototyping environments, and embedded system development.
Key Features
Passive Infrared (PIR) Detection – Detects motion by sensing changes in infrared radiation emitted by the human body
Compact Form Factor – Suitable for space-constrained designs
Low Power Consumption – Optimized for battery-powered and energy-efficient applications
Wide Operating Voltage Range – Compatible with 4.5V to 20V DC systems
Digital Output Signal – Provides a straightforward HIGH/LOW output for direct microcontroller interfacing
Repeatable Trigger Mode – Maintains output while motion is continuously detected
Technical Specifications
Operating Voltage: 4.5V–20V DC
Static Current Consumption: < 60µA
Output Voltage: 3.3V (HIGH), 0V (LOW)
Detection Distance: Up to 3 meters
Detection Angle: Approximately 100°
Delay Time: ~8 seconds (fixed, standard configuration)
Operating Temperature: -20°C to +80°C
Applications in STEM and Technical Training
The HC-SR505 is well-suited for:
Motion-activated control systems
Energy-efficient lighting demonstrations
Security and alarm prototypes
Interactive exhibits and displays
Embedded systems and IoT development projects
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