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Monitor Traffic In Alley

Discussion in 'Electronic Design' started by Jim Douglas, Aug 29, 2005.

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  1. Jim Douglas

    Jim Douglas Guest

    After vandalism (two cars tires slashed, cool-aid in pool) at the house I
    want to create some type of monitor that would alert me inside the house
    that someone or something has passed within the alley behind my home. The
    alley is about 50' from the house. I don't think I am going to be able to
    use something that crosses the alley as the back side neighbor might not
    want something on his fence.

    I want the circuit to monitor traffic and emit a flash and short beep inside
    the house. I would turn the circuit on at night. Any tips, recommendations?

  2. Donald

    Donald Guest
  3. Phil Allison

    Phil Allison Guest

    "Jim Douglas"

    ** Err - a PIR movement detector ??

    Same as used in every front door/ yard light, home burglar alarm, door
    minder etc etc ....

    ............... Phil
  4. Jim Thompson

    Jim Thompson Guest

    X-band door opener as found at your typical grocery store?

    I've also made my own acoustic doppler using 40KHz transducers.

    You could also use IR "light" beam stuff. Just paste a bicycle
    reflector on the neighbor's fence. He'd likely not notice, OR might
    be interested in participating.

    I found that my next door neighbor, when I lived in North Scottsdale,
    was very effective against vandals sneaking thru the horse easement.
    He just jump out of his house in his underwear shorts, point his
    shotgun, and watch 'em run ;-)

    ...Jim Thompson
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