Re: [neonixie-l] HVPS for nixie clock kit

Michel van der Meij Tue, 02 Apr 2013 04:31:54 -0700

Hi Aaron,

I don't know for how long that module is around, quite a while I think (at least 1 year). There's also the 1364 which has the same performance but different type of board. It's hard to beat a price like that with your own design.

I ended up making a daughter board for the 555 HV supply with the option to use a 1363 module instead, see how it goes. With a bit of luck I will have the boards in about 1 or 2 weeks.

I think the switching frequency of the 1363 is quite high, shouldn't be audible. Not really my thing to wind my own coils, just grab a couple and see which one works best :-).

Switched capacitor all the way to 180V? Interesting idea, I wonder how efficient that would be. You could go 12 - 24 - 48 - 96 -192, it's only a few steps so it might actually work just fine.

Regards,
Michel

on Apr 02, 2013, Oscilloclock <[email protected]> wrote:

Hi Michel, I did not know about that module but it looks very interesting. How old is the module? I didn't spot the switching frequency mentioned in the PDF specs. It must be quite low for people to be able to actually hear various resonations in the audible range?

But using discrete components in a boost topology with a modern switcher and off-the-shelf inductor you should be able to get at least a 200kHz supply going. If not 1MHz. Not sure about the noise but if you're not loading it heavily and you have a good efficiency design, surely it could be minimal?

If I were building the kit I might actually want to wind my own inductor. You could furnish the core and wire as part of the kit?

You could also have the commercial HVPS module mounted on a plug-in daughter board, that way you could just redesign the daughter board around any module in the future and customers could replace it.

Finally you could also investigate a switched-capacitor power supply, I've not played with them yet. Wonder if there is a chip that can stand off enough voltage to at least drive a voltage doubler array to get the voltage you need?

Cheers
Aaron

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Re: [neonixie-l] HVPS for nixie clock kit

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