On 8 March 2018 at 07:19, Andre <[email protected]> wrote: > Hi, re. capacitors it might be worth mentioning that the normal equation > assumes charge and discharge through a constant current. >
What 'normal equation' do you mean? > Don't forget that the equation includes a non linear term so you'll need > to take that into account (Q=CV2 iirc) where Q is Coulombs, C is > capacitance. > I am puzzled by CV2. The energy (joules) stored in a capacitor is 1/2 C V^2, where C is the capacitance and V the voltage. I don't know if that's what you mean. > If this is done using something like an LM317T in CC mode or even a string > of them (my idea) with anti-overload circuitry added externally then this > may well work. > Any series resistance will cause problems so you'd need quite a lot of > regulators but there are ways to use JFETs selected by hand if you really > wanted to > make a test setup. > I am totally lost here! If anyone has an explanation of whether any of the energy to move the leaf comes from the battery/capacitor, or does it all come from the charge applied to the unit, I would like to know. If no energy (apart from leakage) comes from the device applying the electric field, a small capacitor is suitable, and very safe. If at least some of the energy required to move the leaf comes from the voltage supplying the electric field, then a small value capacitor will be no use. This is a fairly low priority task for me at the minute, as I need to do some real work until Friday evening. But over the weekend I will play with this. Dave _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
