haithar,
Sounds interesting. Would you please elaborate? What's easy for you may not be easy for some of the rest of us.
Okay since some people aren't really well in math, i'll explain a bit more. Saying look up the terms doesn't always help when you are simply not good at understanding math by yourself
I'll use the information of this link:
http://en.wikipedia.org/wiki/LC_circuit The frequency you want to use in your circuit is called
f.
Given:
(http://upload.wikimedia.org/math/1/8/4/184ebbb90449a634232e5a0bf9089159.png)
The w (omega) is 2*pi*
f, so we have:
(http://upload.wikimedia.org/math/c/5/9/c590ada4adc34c253de22ee959b8be5c.png)
L is the inductivity of the inductor (measured in Henry), C is the capacity of the used capacitor (measured in Farad).
The simple way is getting a measuring device for both, they are cheap nowadays and more or less accurate. The most exact way would be getting both data via math.
Start with the capacitor, the formula:
(http://upload.wikimedia.org/math/c/3/9/c398c6d4bebd070bb92b186575881980.png)
All you need to know is the Area (A, m²) of the plates (or the tubes, depends on what you are using) and the distance between both (d, in metres). the "e" is the dielectric constant.
The inductor math depends on what type you are using, there is a pretty good explanation here:
http://en.wikipedia.org/wiki/Inductor#FormulaeSo now it isn't as important as before which type of ignition coil you would use or how long the tubes or how big the plates of your cell are. Just calculate the new resonant frequency and everything's fine.
If you are using an ordinary capacitor and the water capacitor somewhere else in your layout/schematics the formulas are still the same.
I hope some more do understand the frequency thing now (if you want to achieve electrical resonance!).
