I've seen simple stuff using a 555. Some examples I googled right now:
http://www.dos4ever.com/flyback/flyback.html
http://www.aplomb.nl/TechStuff/Switcher/Switcher.html
There should be a HV-switcher on this schematic:
http://m.bareille.free.fr/vu-in13/vuin13.pdf
(http://m.bareille.free.fr/vu-in13/vumeter_in13.htm)

Magnus


----- Original Message ----- From: "kosbo.com" <[email protected]>
To: "neonixie-l" <[email protected]>
Sent: Saturday, November 05, 2011 1:29 PM
Subject: [neonixie-l] Re: 350V dc-dc converter ...



Hi,
Thanks a lot for your all replies. As soon as I listed this topic
yesterday, I have found the problem in my MAX771 circuit and now it
works fine up to 400V...

When yesterday  seached on ebay I missed Mike Moorees dc-dc converter,
as it was not listed, but as it's well designed small module  I'll
order a few from Mike for my test beds.

Thanks  a lot for  all your help.


Best wishes, Konstantin
www.kosbo.com


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