Pack of 5 HCSR501 PIR motion IR sensor modules for Arduino Raspberry Pi and DIY electronics projects. These compact modules detect human or animal body movement using passive infrared sensing and provide a simple digital output for easy integration. Key benefits Reliable motion detection: Detects changes in infrared radiation caused by body movement to trigger actions without complex signal processing. Easy to integrate: Standard 3pin output (VCC GND OUT) connects directly to microcontroller digital inputs for plug and play use with Arduino Raspberry Pi and other development boards. response: Onboard potentiometers and jumper settings let you adjust sensitivity and output timing to match your project needs. Space efficient: Small PCB modules fit inside enclosures and tight spaces for discreet installations. Pack of five: Multiple modules included for projects that need coverage in several locations or for prototyping and testing. Important attributes Model: HCSR501 Quantity: 5 pieces Function: Passive infrared motion detection with digital output Compatibility: Works with Arduino Raspberry Pi and most microcontrollers that accept a digital input Power: Operates from common DC supply voltages used in hobby electronics Controls: Adjustable sensitivity and delay time, selectable trigger mode Interface: 3pin header for VCC GND and digital OUT Construction: Standard PCB with electronic components suitable for hobby and prototyping use Practical applications Automated lighting: Turn lights on when motion is detected in hallways closets or entryways to improve convenience and reduce manual switching. Security and monitoring: Use as a trigger for alarms cameras or logging systems to detect unexpected movement around a property. Smart DIY projects: Integrate into occupancy sensing for energy management interactive displays robotics and other IoT prototypes. What you get Five HCSR501 PIR motion IR sensor modules ready for breadboard or permanent installation. Clear adjustment options let you tune detection range and hold time for accurate performance in different environments. Simple to wire reliable in operation and adaptable to many projects these HCSR501 modules are practical sensors for prototyping and small scale deployments.