[sdiy] Really Small Linear Power Supplies ?

[xamboldt]

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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