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IR Detection

Discussion in 'Electronic Design' started by Terry, Jun 20, 2006.

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  1. Terry

    Terry Guest

    I have a PIR (passive infrared) sensor on a motion detector circuit
    that I am playing around with, and am looking for a way to "map" the
    area that this sensor reaches. Is there an inexpensive circuit to
    build, or something to buy (preferred) that I can do this with? I want
    to be able to "see" (figuratively speaking that is), the cone, how far
    out it goes, etc, with this circuit. Any help would be greatly
  2. Rich Grise

    Rich Grise Guest

    How about a light bulb, that's painted flat black, on a dimmer such that
    you can adjust its surface temp. to approx. 98.6F?

    Then, patience, patience, patience! (i.e., put a big piece of paper on
    the floor, slowly move your heat source until the PIR triggers, and mark
    it. Remove the heat source, let the PIR reset, and slowly move it in
    again, and so on.

    Good Luck!
  3. Archilochus

    Archilochus Guest

    Hi Terry,
    The easiest & cheapest way would be to rig up an LED output so that
    when motion is detected you get visual feedback. Then just walk around
    in the sensor area and take note of when the detector is triggered.

    The "Passive" part of PIR means that the detector is not actively
    creating a detection area (like an Active IR sensor would). There is no
    way to detect the sensed area with an external circuit, since the PIR
    sensor emits no IR energy.

  4. Bob Monsen

    Bob Monsen Guest

    You can also get specification sheets on the web from many manufacturers,
    which will probably include a fairly accurate map.
  5. Terry

    Terry Guest

    Already got those, but, of course, they are not representative of what
    I am seeing with my application. I thought if there were a quick way
    to check this out, I could find out if there were any issues.
  6. tony

    tony Guest

    Infrared glasses?
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