Power for a Multi Effects box - need help

[mcasemo]

I have a power supply question for my multi-effects box I'm building.  Sorry if there are simple answers already out there, I've been searching and my head is numb. I've got 7 effects to power, most are +9V.  One requires bipolar 12 v (+/-12v).  I may onboard a -9v, but not really in the mix now.  I have many AC adapters from various electronics (20V, 12V,  9V, ...), so I'm trying to figure out how to provide all the power from one of these adapters.

I've been reading about DC-DC converters with Dual output, and using mouser to drive down to something that may work, like taking 20v from an AC adapter, and getting +/-12 using something like Cincon EC3AW05.  Then using a regulator to step down the 12 or 20 to 9v for the others.

http://www.mouser.com/ProductDetail/Cincon/EC3AW05/?qs=sGAEpiMZZMvGsmoEFRKS8IScV8SUvsqqfAu%2f6W%252b3X9M%3d

So for something like this, do I have to supply +Vin and –Vin?  Or is the –Vin generated by the DC-DC converter?

Any other thoughts?

[jimilee]

Well theres always the road rage.

[juansolo]

Here you go



http://uk.farnell.com/multicomp/mca05d12d/dc-dc-converter-1w-dual-o-p/dp/2079670?Ntt=mca05D12D

Used that in the Maestro PS-1A clones we did. It was the only thing that'd run it properly from a 9v feed and we tried all sorts.

[mcasemo]

thanks jimilee, i think i looked at road rage early on, now i understand it a little better.

thanks juansolo, looks like that will give by -9v as well!