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Offline Eugene52
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« Reply #420 on: January 19, 2019, 04:20:41 pm »
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Quote:Posted by pppp
hi,
there you have full documentation for 2nd chance pi by PaWol

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http://chomikuj.pl/dantech/2nd+ChancePI



When somebody posts a Video on this Forum here of a Full Discrimination PI , Pulse induction Metal Detector that detects a penny, nickle dime and quarter, or gold. And says so on the machine, Let me know !!!!

Best Regards...........Eugene


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Offline pppp
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« Reply #421 on: August 09, 2019, 11:20:25 am »
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The latest firmware v32 is available

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Fully working and free for personal use. There is only 10s long message at start about limitations

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« Reply #422 on: August 20, 2019, 03:40:48 pm »
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Quote:Posted by pppp

The latest firmware v32 is available



Is not there version v33 already?

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« Reply #423 on: August 20, 2019, 10:59:31 pm »
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Quote:Posted by WM6
Is not there version v33 already?


Looks like that at the time of the post #421
It was not available


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« Last Edit: August 20, 2019, 11:02:32 pm by nickel_n »
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« Reply #424 on: November 07, 2019, 07:13:39 pm »
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The chance detector relies on a low capacitance coil for fast responses. I wonder how a coil with ideal capacitance would perform, like a bifilar arrangement.

Nikola Tesla's patent for improvements in electromagnetic coils indicates that such a coil can have no opposition aside from ohmic resistance.
Quoted from his

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patent
: "permits a current of given frequency and potential to pass through it with no other opposition than that of ohmic resistance". Self-induction is neutralized.


The potential downside of bifilar coils is the capacitance. Though it should naturally be at the ideal value for any given coil. Potential difference is half of the supply voltage between any adjacent windings.

I believe when there is negligible self-induction, the inter winding capacitance might not be a problem. Perhaps such a coil can be used for a fast Pi, it's simple to wind.

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« Last Edit: November 07, 2019, 07:18:05 pm by van0014 »
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