HCSR501 Adjustable PIR Motion Sensor Detector Module with Protective Case Compact, reliable pyroelectric infrared motion sensor module designed for electronics kits and DIY projects. The HCSR501 provides adjustable detection and timing for precise and stable motion sensing in a variety of applications. Key benefits Reliable motion detection: Pyroelectric infrared sensor reliably detects changes in infrared radiation caused by moving people or objects. Adjustable settings: Builtin adjustments let you tune sensitivity and trigger timing to match the needs of your project. Easy integration: Standard singlesignal output simplifies connection to microcontrollers, relays, and other control circuits. Protected and portable: Supplied with a protective case for safer handling and cleaner installation during development and testing. Consistent performance: Designed for precision and stable operation in hobby and professional electronics use. Important attributes Model: HCSR501 Function: Infrared pyroelectric motion detection with adjustable sensitivity and timing Compatibility: Suitable for electronics kits, Arduino and other microcontroller projects, robotics, lighting control, and automation systems Material and form: Printed circuit module with components and a protective enclosure for handling and mounting Performance: Stable and repeatable detection behavior suitable for indoor use and prototype applications Typical use scenarios Automatic lighting and energy saving: Turn lights on when motion is detected and off after no movement is seen for a set interval. Security and alert systems: Trigger alarms, cameras, or notifications when unexpected motion is detected in a monitored area. Electronics and robotics projects: Add presence sensing to robots, interactive displays, or automatic control systems in hobby and educational builds. What is included HCSR501 motion sensor module Protective case for the module Additional notes Designed for easy installation and straightforward wiring in kit and prototype environments. Moneyback guarantee for product satisfaction.