Moderators: Dave Moll, Andrew Davie, Steve Anderson
gary wrote:Where do the 2 AC voltages come from Andrew?
Steve Anderson wrote:This doesn't bode well. I suspect you've created a short or some other high-current path here. Seeing as you appear to have used full-wave rectifiers the two windings, one for each supply, need to be separate. No connection between them within the transformer - or use two transformers.
Steve A.
gary wrote:Just one thing, yes you have a ripple free output when you have no load on it, but when you put a load on it things will be different because the capacitor will be discharging between cycles - check the ripple with a dummy load that will be drawing a current at least as much as the real load with be and test the ripple then. I think it will be ok because that's a fairly good sized cap and I doubt you will have too much of a heavy load.
Steve Anderson wrote:But if you're pulling 1A from the +12V regulator, the regulator has to drop 10V from 22V at 1A = 10W - think of a 10W light bulb (globe), they get hot!
Steve Anderson wrote:Without going into it in depth, you generally can't use a common (single) winding into multiple bridge rectifiers. So if this is now performing as you wish with two transformers leave it as such.
Steve A.
Steve Anderson wrote:Yep, a low drop-out volt reg should do the trick, but they can be a bit fussy in other regards. Which device are you thinking of?
Steve A.
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