ard at p850ug1.demon.co.uk
Fri May 30 09:10:26 CDT 2008
> > After working on a SMPSU (or any power supply for that matter, but
> > especially a switcher), I usually power it up to test throught a
> > light-bulb. [...] Has saved me from "secondary catastrophic
> > failures" on more than one occation.
> And I've heard people talk about banning incandescent bulbs entirely.
Whele I use compact fluorescent bulbs a lot, there are 4 places where I
stick to the old filament lamps :
1) Over my lathe. There is significant 50Hz flicker from compact
fluorescents in my experience, I don't want the possible hazard of
thinking something is stopped when in fact it's rotating at a multiple of
the mains frequency
2) In my darkroom. CF's have a long afterglow when you turn them off,
easily enough to fog film. I want a light source I can turn off instantly
3) In my copying stand, where I need a contimuous spectrum of light
4) In my SMPUS current limiter, for obvious electrical reasons.
> Stupid ideas spring eternal....
As I have said sevral times, when I was a kid, 'green' meant 'naive'. I
don't believe that's changed...
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