HCSR505 Mini Infrared PIR Motion Sensor Module Overview A compact passive infrared motion sensor module designed to detect human body movement. The HCSR505 provides a simple digital output for integration into control circuits and microcontroller projects, allowing automatic switching and presence detection in small spaces. Key benefits Reliable motion detection for automation and security: Detects body movement and produces a clean digital output for triggering lights, alarms, or control logic. Easy to integrate: Small PCB module with a 3pin interface for VCC, output, and ground makes wiring straightforward for hobby and professional projects. Spacesaving design: Miniature form factor fits into tight enclosures and compact devices without adding bulk. Practical performance: Designed for steady detection of human motion using a pyroelectric infrared sensor element suitable for common sensing tasks. Main features Function: Passive infrared detection of body movement with a digital signal output when motion is detected. Interface: 3pin connection for power, ground, and output signal compatible with common control circuits and microcontroller systems. Size and form factor: Mini module ideal for installation in compact housings, panels, and portable devices. Construction: Printed circuit board with a pyroelectric infrared sensor and lens for focused detection. Compatibility: Works with a wide range of controllers and automation systems that accept a digital input signal; suitable for use in custom electronics projects and control panels. Typical applications Automatic lighting control: Trigger hallway, closet, or cabinet lights when motion is detected to improve convenience and reduce manual switching. Security and entry detection: Serve as a trigger input for alarm systems or doorcontrol mechanisms to detect approach or entry. Occupancy sensing and energy management: Detect presence in small rooms or workstations to control HVAC, fans, or power to devices for improved efficiency. Robotics and DIY electronics: Provide simple presence input for robots, interactive installations, and sensorbased projects. Why choose this module Straightforward digital output makes it simple to interface with logic circuits and controllers. Miniaturized design supports discreet placement and integration in a variety of applications. Designed specifically for body motion detection, making it suitable for humanpresence sensing tasks. Installation notes Connect the three pins to supply voltage, ground, and the digital input of your controller. Mount the module with the sensor lens oriented toward the area to be monitored for detection coverage. Use it as a trigger signal input; processing and timing functions are typically handled by external circuitry or a controller. This HCSR505 mini PIR motion sensor module provides a compact, reliable way to add human presence detection to automation, security, and electronic projects without complex integration requirements.