Cheap homemade capacitors

[AbbaRue]

To make high voltage caps I used the thin hard plastic cups sold for picnics.
I wrap Alum. Foil around the outside of the cup and then place it inside another cup.
You can keep stacking these cups one on top of the other to get some impressive capacitance.
I hooked it up the the output of a flyback transformer circuit.
placed the output leads close to each other and once the caps were charged they discarged across the gap.
Sounded like large firecrackers going off. Got so load I could hardly stand the noise.
Hope this helps someone make a HV power supply too.
AbbaRue.

[RunningBare]

Making high voltage caps is easy, it depends on the dialectric between each conducting layer, making high farads is a totaly different matter requiring 1000s if not 100s of 1000s of layers, if you strip down a 100 uf capacitor, inside you will find what looks like a plain foil rolled up, if you unravel the foil you will find it has a conductive painted layer on each side of what looks like thin mica(the dialectric), even super capacitors with the graphite layer still has 1000s of turns making up 1000s of layers, thats why their power to weight ratio is still worse than batteries.

[lancaIV]

Probably you heared about a Mr. Takahashi-Motor,
but do you also know that he has publicated a patent about a up to  100X higher charge than up-to-date capacitor !?

S
  dL