zinkey2019

		Quote:			Posted by xavier
	Hi GD So would that be like some people can bend spoons and some can?t? Or is it some thing that works and that can be learned by any one? I will try this dowsing thing. In the morning I will bury a gold ring and see what goes Best regards Xavier

Some people swear by dowsing and others are non-believers. I fall into the "maybe" category but like all other flights of fancy, I need proof, not hysterical conjecture that something works.

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		Quote:			Posted by xavier
	I totally agree with you there GD I?m also a man of scientific proof but I tend to like to have my own proof too just like with my coils. I have found a new design that I will test in the new year and if it works as well in the field as on the bench then I will post it. Thanks for all the info Have a good one Xavier

This is spooky, mate. I just finished a design for a quadrature detection coil for an experimental machine of mine. It has four transmit coils and one large receive coil. I'll be winding it while the weather here is in the high zone and have it ready probably by New Year's Day for testing. I might post the results here if I don't totally embarrass myself by having it fail. You know how that goes.

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		Quote:			Posted by xavier
	I  sure do ?. How many times I thoght that I had something good going and it turned out to be a flop when doing field testing MAN the rubish bin is full of it  My coil design is based on the double D type coils but with an extra coil in the centre. I don?t want to say more right now before doing any testing. I like what you said about your new coil as I had an idea of making a three dimensional coil what I mean by that is having three reception coils and one transmit coil but never made it perhaps I will once I get more wire to play with. Best regards Xavier

Maybe we should start a mad scientist club here! We could send "Igor" out for more wire as we look skyward with up-stretched arms and utter, "More wire! Must have more wire!"

I've got 4 small transmit coils all on an offset plane from each other focused at a point below the receiver coil. The offset is variable for now so I can experiment with tilt and see the returns.

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Yes, exactly. I intend to use it as 4 individually transmitted pulses being received to pinpoint a target. Ordinary use will be all four firing at once but pinpointing will take two at a time or 1 at a time to increase resolution on the target. That's the theory, anyway. No guarantees but the fun is in the experimenting. Eventually I want to couple this to an X pattern of high intensity LEDs on the coil as long as they don't use excessive power. When you move it so the middle LED is lit, you have the target in the exact center.

As to getting a 3D image, that, in my opinion, would need at least 32 transmit coils. Signal analysis will tell me more. Fingers crossed.

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Xavier, I don't think that 4 returns are enough to get an accurate image. Just a blob is all. You'd need a minimum of 32 based on the pixel to eye ratio to get a visual. That 32 matches the resolution of desktop icons which can be clearly discerned. With 32 target returns to analyze, the microcontroller will be able to do the job just fine. With 4, no chance. The best I can hope for is a very good pin-pointer from the analysis.

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