[sdiy] Really Small Linear Power Supplies ?

[harrybissell at wowway.com]

That power supply was used on the Chris MacDonald MiniModular

H^) harry


On Mon, 27 Oct 2008 21:04:17 -0400, xamboldt wrote
> Someone on the Wiard list mentioned a wall-wart a few weeks ago made 
>  by Elpac. It puts out +/-15V at 0.24A, and is available at Allied  Electronics.
> 
> "Go to www.alliedelec.com and search for part number WM071-1950 they 
>  sell for $37 USD."
> 
> -Chris
> 
> On Oct 27, 2008, at 8:29 PM, Ken Elhardt wrote:
> 
> >>> You can't find a power supply that's small enough for your  
> >>> enclosure? I missed your original post. Why not use a "wall wart"  
> >>> or "lump in the line" solution?
> >
> > Another possibility is to rearrange the components of a supply that
> > would fit *if* it were laid out differently.
> >
> > Finally, you could build your own. There are plans for a +/-15V power
> > supply in the sample chapter of Thomas Henry's e-Drum book:<<
> >
> >
> > Ah, you're a little behind on the posts.  A "wall wart" was maybe my
> > next option, but they usually only output a single voltage.  I had
> > posted asking how one also gets a negative voltage out of them.  In
> > some cases it involves almost a whole power supply board such as the
> > one on the musicfromouterspace site I was just looking at.  I've
> > looked at lump in the middle or similar supplies, like those that
> > power my LCD display I'm now typing on, or my external hard drive and
> > Jaz drives, but those also usually only output 1 or 2 positive
> > voltages and most seem to cost considerably more than a regular power
> > supply, which I don't understand why.
> >
> > I was really just hoping to buy something and pop it in, without going
> > through hours of searching through catalogs buying individual parts at
> > one place, and a PCB elsewhere.  That's more hassle and work to go
> > through than to just let the case be ridiculously deep.  I can't find
> > a picture of the Condor supply I'm probably just going to have to buy,
> > but if it's similar to one of the other models that Mouser has
> > pictured in their catalog, it looks like I can remove the PCB which
> > looks thin in one direction, and remove the transformer from the metal
> > enclosure and arrange them to fit in less than a 2.5" height space.
> > If so, then problem solved.  It just seems that in this day where
> > everything is being shrunk down to fit in ever smaller products, one
> > should be able to find a power supply that can fit into a 2"x2.5"xAny
> > Length space.
> >
> > -Elhardt
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Harry Bissell & Nora Abdullah 4eva