[sdiy] Really Small Linear Power Supplies ?

[Brett Maddaford]

I think dot com have a wallwart PS that does +\-15 and +5 volts

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Ken Elhardt
Sent: Tuesday, 28 October 2008 11:30 
To: John Mahoney
Cc: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Really Small Linear Power Supplies ?

>>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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