[sdiy] +15 -15 DC Power supply, adding +5 DC

harrybissell at wowway.com harrybissell at wowway.com
Mon Nov 10 21:59:34 CET 2008


well then how much of the +15V supply do you have left ?

You could measure the current that you are drawing now, and see if you have
enough surplus.  

I'd guess that a midi converted would not use more than 100 - 200mA

Is the converter a commercial unit, if so they should be able to tell you
what the current draw is.  If its a DIY, is there a schematic available ?

H^) harry





On Mon, 10 Nov 2008 15:07:03 -0500, Cory Scott wrote
> i dont know how much current... but its for a midi to cv converter  
> like the polydac
> 
> On Nov 10, 2008, at 2:37 PM, harrybissell at wowway.com wrote:
> 
> > What current do you need ?   If it is small, you could add a 7805
> > regulator to the +15V output.
> >
> > If you need a lot, the transformer may not be that efficient...  
> > you'd want a
> > lower voltage than the one in a +/-15V supply....
> >
> > H^) harry
> >
> >
> >
> >
> > On Mon, 10 Nov 2008 13:52:14 -0500, Cory Scott wrote
> >> Hello
> >>
> >> So i have a +15 and -15 200ma power supply and now i need a +5 is
> >> there any way i can build a small circuit on the side
> >> to get that +5 from the same transformer?
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> >
> > Harry Bissell & Nora Abdullah 4eva
> >
> 
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Harry Bissell & Nora Abdullah 4eva




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