Subject: Re: Pet Locator Design Help Needed
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NNTP-Posting-Date: Sat, 11 Jan 2003 16:24:30 GMT
Organization: AT&T Broadband
Date: Sat, 11 Jan 2003 16:24:30 GMT
On Sat, 11 Jan 2003 23:59:33 +1300, Barry Lennox
>On Sat, 11 Jan 2003 01:55:38 GMT, WildOne wrote:
>>I am looking at building a device to help a pet owner find their pet,
>>specifically a cat, in a local neighborhood. The cat would have a
>>collar with a device on it, somewhat described below, and the owner a
>>hand held radio for homing in on the pet.
>There's a very good book on this topic "A Manual for Wildlife Radio
>Tagging" by Robert Kenward, it's a bit rare, but a good bookshop or
>Amazon should be able to get it. It covers everything, including
>transmitters, receivers, antennas, tag mounting, tracking, data
>analysis and animal behaviour. There's also a number of tag designs in
>there, but it is a bit light on schematic details. The smallest seems
>to be about 1 gram with a battery life of 4-6 weeks.
Thanks, I think that is one of the first things I'll do, get something
to get me a little more familiar with the fundamentals of the task at
hand. I will check out Amazon and see if they can get it.
>For more detailed info on schematics, etc, the was a couple of papers
>published in the UK, that have a lot of excellent design details.
>There was also a very good article in Scientific American in about
>1968 or 69. I have a copies of all these somewhere. The SA one
>obviously uses much older techniques, (definately pre-SMD) but these
>may still be perfectly good for your application. I have copies of
>all these, but it will be a struggle to find them right now.
Please don't go out of your way, but if you happen to run into them I
would be interested, as long as the technology is not so old you can't
get parts anymore I don't think I care that it's old or new.
>The good news is that a cat will be easier than most, as they are a
>large animal, are co-operative (well. most of the time!) and are
>generally tolerant of wearing collars. The suggested max weight of a
>body tag is about 2-4% of the animal's weight, so you could build a
>pretty hefty one for a cat.
The one I have new, bought off the shelf, that just does the beeping
and flashing, weighs about the same as the typical key chain remote
control for a car and that seemed about the limit I would want to go,
looking at how my cat acts with it on. But I think the form factor
could make it allow more weight, this hangs from the collar.
Again, thanks for your feedback,