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To make some cheap high voltage capacitors the above is all you need to make them .
First you will need a template to enable cut your aluminiun to the shape of the foam cup sides.
I also have these foam cups placed on a laminate kitchen table that means it's some sort of plastic top and I have found, that if I roll the foam cups over it, there is produced on the cup an electrostatic charge that holds the AL foil on the cups as shown above,and in place when the foil is placed next to it. I have used no glue on thes cups at all.
If you don't have a plastic table top to work from, you may be able to produce a small electrostatic holding charge on it, by other means if you so wish,you might be able to get away with not using this method at all.
Insert a piece of foil in bottom ,this acts as a conductive connector to inner plate
one cup is placed inside the other and these foam the two plates of the capacitor.
Place a foam cup on bottom without foil and this then becomes a simple capacitor.
The one above has 40 such cups.
One complete layer is configured to be postive plates and the next layer consisting of the negative layer and so on.
The bottom two layers of cups are there for insulating purposes and are mounted on a PVC cutting board.
A capacitor works on the principal of have two conductive plates which are very close and are facing each other.
When a voltage is applied to one side of the capacitor,the electrons will attract approximately the same voltage on the other plate of the capacitator because of the electrical charge that is built up on the first plate.
I haven't tried this myself, but I think those foam eating plates could also work in this role as a capacitor as well
Calculating Capacitates in series can be calculated by
(1/c1 +1/c2 1/c3 and so on
The new value will always be lower.
Calculating capacitates in parallel
A Note on Polystyrene Capacitors
Usually chosen for for applications requiring tight tolerance coupled with high stability.
plastic cup capacitor page
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