HCSR501 PIR Motion Sensor Module – Reliable Infrared Detection for Automatic Control Key Features and Specifications: • Operating Voltage Range: 4.8V to 20V DC • Standard Operating Voltage: 3.3V • Detection Angle: Less than 100 degrees (cone angle) • Lens Diameter: 23mm (default size) • Adjustable Output Timing: 0.5 seconds to 200 seconds via Potentiometer 105 • Compact and efficient design for flexible integration into various devices Performance and Functionality: The HCSR501 PIR motion sensor module uses advanced infrared technology to detect human movement with sensitivity and reliability. Designed for lowvoltage operation, it is practical for batterypowered systems and offers consistent performance in a wide range of conditions. When motion is detected within the sensor's range, it outputs a level signal. Once movement stops and the sensing area is clear, it delays for a set period then automatically switches to a lowlevel output. This ensures energy efficiency and prevents unnecessary operation of connected devices. Trigger Modes: • Single Trigger Mode – The delay period starts as soon as motion is detected. During this delay, detections are ignored. • Repeatable Trigger Mode – Every motion detection restarts the delay timer, allowing continuous activation while movement is present. Applications: • Automatic Lighting – Lights turn on when someone enters a room and switch off after a delay, saving energy. • Security Systems – Enables automated alerts or recording when motion is detected in restricted areas. • Automated Equipment – Ideal for batterypowered devices like fans, doors, or toys that activate on human presence. Typical Use Scenarios: 1. Home automation – Install in hallways or entryways to turn lights on as you enter and off when you leave. 2. Office energy management – Automatically control lighting or ventilation based on occupancy. 3. Industrial automation – Integrate into control systems for machinery or safety equipment that respond to human movement. The HCSR501 offers a dependable motion detection solution with adjustable settings, versatile trigger modes, and compatibility with a wide variety of automatic control applications. Its compact size and performance infrared sensing make it ideal for enhancing convenience, improving energy efficiency, and supporting reliable automation.