Re: generating 180VDC at 5mA or so, simply...
From: Genome (genome_at_nothere.net)
Date: 09/01/04
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Date: Wed, 01 Sep 2004 15:58:42 GMT
"Mike Deblis" <mdeblis@hotmail.com> wrote in message
news:bc45f679.0409010100.6e9263c1@posting.google.com...
> "Mike Deblis" <mdeblis@hotmail.com> wrote in message
news:<ch2n7j$kvi$1@hercules.btinternet.com>...
> > Hi,
> >
> > I was wondering how to generate about 180VDC continuous at a few mA (at
> > least 5) from 9-12VDC in (no mains).
> ...
>
> I should qualify this - 2% or 3% regulation is probably fine, and this
> is an exercise (not a class - I'm far too old for that!) in NOT using
> a switcher chip - I'm well aware of their advantages in commercial
> products, but this is just a bit of fun to see how simple such a
> non-critical PSU can be made. I've use LT and MAX (771/1771) for
> exactly this sort of PSU, but I don't need their 80-90% efficiencies
> and 1% reg etc. Its more a question of "given a couple of discrete
> semiconductors and a few passives, plus a hand-wound small inductor,
> can something good enough be made"? i.e. "outside the box" thinking...
>
> The object is to drive some neon dischange tubes that strike at about
> 180VDC and which take about 2mA or so each.
>
> Mike
Jeeez. Discrete version now in alt.binaries.schematics.electronic.
DNA
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