[sdiy] Starting a synth project

[Tom Arnold]

On Mon, Dec 27, 2004 at 11:24:57AM -0800, Gene Stopp wrote:
> And a quick glance at eBay shows, let's see... aha! TWO Power One +/-15 @ 5
> amp supplies for $19.99 for both with no reserve and zero bids, one day to
> go on a seven day auction. Not bad! Those are going to be big and heavy, but
> at five amps per rail you could power about a hundred modules. And have a
> spare.

Just a note about the Power One supplies.  This will be a no-brainer to
everyone but I'll mention it anyway because I forgot and it bit me in the
behind...

They have overvoltage protection.  If you tweak them to a higher voltage (
say, +/-5 tweaked to +/-6 ) you also have to change some resistor values in
the crowbar circuit or it will happily pop the mains fuse for you under any
load.

I vaguely remember there being something you had to tweak for even switching
a +/-12 to +/-15 ( I think it was a jumper cut or add depending on direction
).  Unfortunatly PowerOne doesnt heavily document their linear supplies on the
website.

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
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