NNTP-Posting-Date: Sat, 11 Jan 2003 04:57:19 -0600
From: Barry Lennox
Subject: Re: Pet Locator Design Help Needed
Date: Sat, 11 Jan 2003 23:59:33 +1300
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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.
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.
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.