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High voltage & marx generator Answered

I'm looking at some instructables, and the simplicity of the cockroft-walton generator is quite interesting.
Because I've always been fascinated by lightning and electric sparks (ever since I saw a wimshurst machine as a kid), I was thinking of building a CW generator, to power a small marx generator.

Now, I found the parts, but I don't know much about electronics, so I have a few questions, and I was hoping someone here could help me out.

1) For ceramic capacitors, some are labeled for instance '15kV', while others are '15VDC'. I assume the latter only work for DC input, is this correct?

2) If I were to make a CW generator using a few 400V capacitors and a fuse (assuming I don't f*k up putting it together) like this: https://www.instructables.com/id/High-Voltage-Power-Supply-For-Marx-Generator/?&sort=ACTIVE&l
Is there a risk of blowing a fuse in the house, or is that fuse in the setup enough protection?

3) Is there any risk for other electrical devices, like a computer, when I plug this in?

4) I work at a computer repair shop, are there any useful components in power supplies, old screens...?

Thanks in advance!

2 Replies

cgpirre (author)2011-04-05

I feel a bit better now ;)

I knew that there are specific voltage ratings for the ceramics, I was just wondering about the difference between just 'xxx kV' and 'xxx VDC'. I typo'd in the first post, should've been '15,000 VDC'.

Also, I have this flyback transformer out of a plasma globe, it's soldered onto a little circuit board with some resistors, capacitors, and 1 transistor.
Should I de-solder it, or would it be better to use it as it is now? I have no clue about these things, so I don't know what parts are useful.

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guyfrom7up (author)2011-04-04

inside CRTs there's flyback transformers, very useful. Also some high voltage capacitors, if you're looking for them.

ceramic capacitors have specific voltage ratings for each indivitdual capacitor, some may be rated at 15000 volts while others might only be rated at 6.3 volts.

Typically houses has 20 amp circuit breakers, which are nbd to trip (just flick them off then on).
The fuse in the instructable will definitely blow first.

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