Author Topic: What is inside these ubiquitous little HV modules?  (Read 499 times)

Offline MRMILSTAR

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What is inside these ubiquitous little HV modules?
« on: December 17, 2019, 10:00:24 PM »
I see these little HV modules all over E-Bay for practically nothing. Does anyone know what circuit topology is used inside these things? Is it some sort of CW multiplier? The voltage ratings listed are nonsense. I have seen numbers ranging from 20 KV to 1 MV! I suspect it is close to 20 KV. Are they useful for anything? The comments that I have read indicate that they are very fragile. They are so cheap I am considering buying a few just to experiment with them.

Here is a typical listing:

https://www.ebay.com/itm/DC-3-6-6V-400KV-400000V-Boost-Step-up-Power-Module-High-voltage-Generator-Newest/223799936315?hash=item341b84053b:g:mtcAAOSws65d-Hqx
Steve White
Cedar Rapids, Iowa
Retired electrical engineer

Offline klugesmith

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Re: What is inside these ubiquitous little HV modules?
« Reply #1 on: December 17, 2019, 11:22:04 PM »
Get some & find out!
I'm pleased to see the conservative disclaimers in the ebay listing. 

For example, "not intended for continuous duty".

And "no-load operation may damage module because of excessive output voltage". 
That's nothing to be ashamed of.  When a gasoline engine runs with one spark plug not firing, it's hard on the ignition coil.

High Voltage Forum

Re: What is inside these ubiquitous little HV modules?
« Reply #1 on: December 17, 2019, 11:22:04 PM »

 


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