fireant007
Member
I've built a few 'nixie' clocks, one has an IV13 linear neon bargraph, they take more power than the average nixie.
There are 2 approaches, 1 is power them direct from the mains as vintage equipment often did, and the other is an smps, 100 tubes is going to use at least 100watts, so I'd be looking at a push pull converter, probably a sg3525 smps ic, and a etd39 or etd44 ceramic transformer, a couple of mosfets and the required dicretes, push pull mode without feedback would be adequate and simple.
Do you have much experience with switching supplies?
Hi Doc,
I do understand them ... yes... laying them out is a different matter.
See post 13 for the ideal SMPS for this project. UNLESS you are trying to feed it 240Vac...... because as you may or may not know ... you can't reduce a step up or boost supply to less than the supply voltage.
I have not found any buck boost chip that will handle any more than about 60 volts... otherwise my problem would be solved !
Hence why I think Spec is on the right track ... I just have to convince him that you can't put the anode resistor on the cathode side ....
The cathode is the indicator !
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