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Invisible fence for dogs.

Discussion in 'Electronic Design' started by Check It Out, Oct 1, 2003.

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  1. Check It Out

    Check It Out Guest

    I'd like to make my own invisible (underground) fence for my dog. Anyone
    have links to circuit schematics for these 9-10kHz trans, and rec?
  2. Ken Taylor

    Ken Taylor Guest

    What makes you think that frequency will do the job?
  3. 9-10kHz is still in the human hearing range.

    I think you need something above 20kHz (mybe 22kHz some young children can
    hear sounds above 20kHz).
    But some of these sounds are used to call dogs, and that's not what you
    want I think.

    So only when you make a very loud utrasound, it's not the sound itself
    which scares them, but the loudness, (maybe loud-pulsating ?), since most
    dogs are sensitive from 50Hz-40kHz, I would use about 35kHz.

    But you might just scare away lots of animals that way, and some asmatic
    baby's might freak out too. (asmatic children can sometimes hear up to

    There are other ways too, but that's a bit off topic, I did some workshops
    with Michael and Treeny Roads, they teach you how to communicate with
    animals, and it does work, I never had any problems with mice or insects
    anymore since I'm using these techniques. ( )

  4. I can't see any reference on the site to any "Dr. Doolittle" type
    How does one stop other people's cats crapping on the lawn?
  5. How does one stop other people's cats crapping on the lawn?

    errr... Do what my mum used to do, and put kebab skewer thingits poking out
    of the ground at random angles. We never saw any evidence of cat after
    that... :)

    Andrew Howard
  6. Paul B

    Paul B Guest

    Perhaps he meant to say 9-10*Kv* transformer.
  7. throw your used coffee-powder on your lawn. cats hate it. But that doesn't
    have anything to do with Dr. Doolittle skills.
  8. Ken Taylor

    Ken Taylor Guest )
    A 555, a 2N3055 and a car ignition coil, with a long wire around the yard.
    Works a treat - they figure out *real* quick not to come around. Only needs
    to be on for a week or so, then they stay away until the next litter of
    strays starts roaming a few months later (then start again).

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