HCSR501 Passive Infrared Motion Sensor Module, color green Key benefits Detects human movement reliably to trigger lights, alarms, cameras, or automation routines Simple to integrate with microcontrollers and electronics projects for rapid prototyping Onboard adjustment options let you tune sensitivity and trigger duration for different environments Compact and lightweight form factor fits tight spaces and small enclosures What this module does Passive infrared sensor module that senses motion through changes in infrared energy Provides a digital output signal when motion is detected for easy interfacing with control circuits Why you need it Automates routine tasks such as lighting or recording to save manual effort Helps reduce energy waste by activating devices only when presence is detected Enables responsive, eventdriven systems without complex programming Important attributes Function: passive infrared motion detection with a digital trigger output Compatibility: designed for use with microcontrollers and single board computers for hobbyist and professional projects Size and form: compact PCB module that mounts easily in enclosures or onto test rigs Material and build: standard electronic components on a printed circuit board suitable for electronics projects Performance: responsive motion detection with adjustable settings for sensitivity and hold time Typical applications Home automation: automatically turn on corridor or stairway lighting when motion is detected Security and monitoring: activate cameras or alerts when movement occurs in a monitored area DIY electronics and robotics: add motion awareness to microcontroller projects and prototypes Integration tips Place the sensor where it has a clear line of sight to the monitored area for detection Use the onboard adjustments to balance sensitivity and false triggers for your specific installation Combine with your controller to log events, trigger devices, or create conditional behaviors This green HCSR501 module is a straightforward sensor solution for motiontriggered projects and installations that require reliable, easy to use presence detection.