Have you tried the same process of rewinding the transformer on any of the small switching power supplies meant for driving LEDs, like the one shown in the picture below? The market is currently swamped with these power supplies and they are very cheap and modifying one or two in addition to using them as they are seems very attractive to me at least.
/Martin On Thursday, 15 October 2015 02:04:35 UTC+2, taylorjpt wrote: > > I did the same process on an HDP24-1AWA01FZ (12V @ 2A) of which I have a > couple hundred scrap units and am getting a clean 170V at 140mA. These > units are welded better so I should find an easier way to open them. > > This is so much easier than the way I tried to do it years ago by trying > to redesign the feedback circuits to make the switcher regulate the high > voltage directly: I still needed a low voltage rail to generate the logic > bias for the opto-coupled feedback circuits which meant adding a linear > post regulator or a separate winding and output rectifier/filter. By > allowing the switcher to run at its designed output voltage and putting up > with sloppier load regulation I am getting the job done with no board > modifications. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b8b23964-e060-405c-a7fa-5893c5da9fa4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
