HCSR501 PIR Motion Sensor Module Pack of 5 Product overview These HCSR501 passive infrared motion sensor modules detect human motion for use in electronics and automation projects. Each module provides an adjustable detection range up to 7 meters and a 120 degree sensing angle. Designed for easy integration, the modules operate from DC 4.5V to 20V, consume little power, and produce a 3.3V logic output compatible with common microcontroller boards. Key benefits Broad compatibility: Works directly with Arduino and Raspberry Pi projects for motion detection and automation tasks. Reliable motion sensing: Adjustable detection range up to 7 meters and a 120 degree sensing angle provide effective coverage for most indoor applications. Easy to install: Modules include mounting holes for straightforward attachment to panels, enclosures, or mounting brackets. Simple electrical integration: Operates from DC 4.5V to 20V and outputs a 3.3V logic level for direct connection to many microcontroller inputs, helping reduce the need for additional level shifting. Cost effective kit: Pack of 5 identical HCSR501 modules suitable for multiple locations or parallel projects. How this product solves common problems Eliminates the need for constant manual control by triggering actions automatically when motion is detected. Reduces wiring complexity by providing a compatible 3.3V logic output, simplifying connections to low voltage controllers. Offers placement flexibility with mounting holes and an adjustable detection range to tune coverage and avoid false triggers from distant movement. Typical use scenarios Automated lighting: Turn lights on in hallways, closets, or stairways when motion is detected to improve convenience and save energy. Security and alert systems: Trigger alarms, cameras, or notification routines when unexpected movement is detected in monitored areas. Robotics and interactive installations: Provide presence sensing input for robots, art installations, or interactive displays controlled by Arduino or Raspberry Pi. Package contents 5 x HCSR501 PIR motion sensor modules with mounting holes Technical summary Model: HCSR501 Detection range: Adjustable, up to 7 meters Sensing angle: 120 degrees Supply voltage: DC 4.5V to 20V Output level: 3.3V logic Power consumption: Low This pack provides multiple HCSR501 modules for quick deployment across several projects or locations while maintaining straightforward integration and reliable motion detection.