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Old 02-08-2019, 04:43 AM
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Originally Posted by Armagdn03 View Post
It was mostly an iterative process. I picked a rather large coil (few hundred turns) and a smallish cap, say around 01f. I placed them in parallel and used a frequency generator and oscilloscope to find their resonant frequency. Then I simply matched it on the second coil and cap. This way I essentially had two resonant systems matched to the same frequency. Simple as that.

you could also figure out the whole process on paper first with some minor adjustments. This would be helpful for example if you wanted the system to work at a specific frequency.

So, basically, I need two identical coils and caps. I can find the inductance of the coils with an inductance meter.

Then just plug in the values in the formula to find the resonant frequency.

Then dial in the frequency generator to above frequency, fine tune, and then I should hit resonance.

That would make an awesome kit to sell on ebay.

Added content: I found a way to calculate the inductance of the coil.

Go here:

Another L calculator: Coil32 - the coil inductance calculator

Coil on a ferrite core: Coil32 - Ferrite Rod Coil Calculator

Wire size conversion to mm:


Last edited by vidbid; 02-08-2019 at 05:07 AM.
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