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  • #6726705
  • Manufacturer: PARALLAX
  • UPC #644890280274
  • Model #555-28027-RT
  • What It Can Do

    • Detects motion of humans or animals from as far away as 30 feet
    • Silent operation for alarms, motion activated nightlights, holiday props
    • Automatically resets after period of inactivity

    Passive infrared (PIR) sensors detect motion by comparing the amount of infrared radiation that reaches a pair of detectors. When the two detectors "see" different values, the sensor indicates it as movement of an object, such as a person or an animal. PIR sensors are often used in driveway security systems, which turn on a light (but only at night) when someone approaches the house.

    The Parallax PIR Motion Sensor has a simple on/off output: when on, the sensor is detecting movement. When movement stops the output turns off (after a short delay). The output of the sensor can be directly connected to a microcontroller, and operates much like a switch. You can use the on/off condition to directly read the current status of the PIR sensor.

    A selectable jumper on the sensor lets you set working distance:

    • L (for Long) position, the effective sensor distance is up to 30 feet. This increases the sensitivity of the sensor, which may also cause more false triggers.
    • S (for Short) position, the sensor distance is up to 15 feet.



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    Detail Description
    Detailed Description
    (Manufacturer # 555-28027-RT )

    Parts List

    • PIR Motion Sensor
    • BASIC Stamp  HomeWork Board, Propeller QuickStart, or Arduino Uno microcontroller
    • 22 gauge solid conductor hookup wire

    Technical Specifications   [return to top]
     Specification Value
    Type: Sensor
    Level: Beginner
    Style: Accessory


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