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does any body no of any designs of a vlf motion detector that uses a single coil. if not why? i have seen one good proposed idea in a magazine, and the benefiets it would bring over the more usual two coil.
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Re: single coil vlf
There is one i came across some months ago.
I can mail it if you're still interested
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Regards, Rudolf -
Re: single coil vlf
See one at http://metaldetector.bratsk-city.ru/shematic/IB/IB Andrei Chtchedrine.htm.
In my opinion its simple coil is not worth problems of thermal instability.Comment
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