R: Fw: [sdiy] First synth to build? PC power supply unit

[harry]

One more (big) Con:  Switches almost always need a minimum load
on their main (usually 5V) output...  if its only 20% of full rated load... that
can add up to tens-hundreds of watts you need to get rid of... as heat.

See those fans in the average PC ???

H^) harry

Jim Patchell wrote:

>     PC Power Supplies:
>
>     Pros:
>         Widely Availiable
>         CHEAP!
>         Lot's of Power (if you are using the +5 volts).
>
>     Cons:
>         These are swtichers.  You have to be mindful of potential noise
> problems.
>         Most of the power comes out on the +5 volt lines.
>         +/-12, +/-5 volts supplies (If you are using +12 volts, this would be a
> pro).
>
>     The PC power supply would probably me a lot more useful for a digital synth
> (oopps...gotta go wash my mounth out with soap now !)
>
>     Foaming at the mouth...
>
>     -Jim
>
> sandrotraversi wrote:
>
> > Hi list ,
> >
> > i'm not a tech and i'd have to be the latest to speak , but
> > ... why not a pc power supply ?
> > or is PC power supply units good for a sinth DIY project ?
> >
> > Sandro
> >
> > ----- Original Message -----
> > From: harry <harrybissell at prodigy.net>
> > To: Blue_NINE.a <Blue at ZeroArtRadio.com>
> > Cc: Synth DIY <synth-diy at dropmix.xs4all.nl>
> > Sent: Friday, September 21, 2001 4:34 AM
> > Subject: Re: Fw: [sdiy] First synth to build?
> >
> > > Sorry Guys....  (gotta go here...)
> > >
> > > Yeah I have one (suggestion) ... BUY a power supply... surplus for about
> > > $20-25
> > > Linear supply, like a PowerOne or similar brand.  Get a +/-15V @
> > > 800mA or 1A....
> > >
> > > Or get one with +5V, +/-15V... a little more expensive, and heavier but
> > > easier to find.  You can later make +/- 12 from that supply if you need
> > it.
> > >
> > > See www.mpja.com as one possible source...
> > >
> > > Then build a synth module like a simple LFO, noise source, etc... to
> > start.
> > >
> > > A lot of newbie troubles come from a bad or marginal power supply. Its
> > nice
> > > to know that if theres a problem, it ain't the supply.
> > >
> > > You might consider a module kit for starts....
> > >
> > > H^) harry
> > >
> > > "Blue_NINE.a" wrote:
> > >
> > > > > > Only after that, hardware starts.
> > > > > > First a nice +15 and -15 volts powersupply (or whatever your dreams
> > > > need)
> > > > > > It's a nive starter and you'll need it anyways.
> > > >
> > > >  any power supply suggestions? what if i wanna mix and match Modules
> > from
> > > >  different companies....?
> > >