Parallax Perspective: PIR Sensor

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Uploaded by on May 18, 2009

An introduction to the PIR (Passive Infrared) Sensor module (#555-28027) from Parallax Inc. Detect motion up to 20 feet away.

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Education

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Standard YouTube License

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  • hey i hav 4 pin PIR BS0081 sensor similar kind of this sensor ...!!!

    but i dont kno how it works

    there are Vcc ,GND ,OUT and another extra pin CDS .

    pls help me for this ..!!

    it will give output continuosly 3.4v and no change in multimeter ..!!

    thank u

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