[sdiy] +/- 15v from a wall wart...

[Seb Francis]

Dave Magnuson wrote:
> Hi Fred & Justin
>
> You'll need 9VAC for bipolar 9VDC out, 12VAC for +/-12VDC and 15VAC 
> for +/-15VDC.
>

Not necessarily.  Depending on the capacity of the wallwart and the load 
you can usually get away with 9VAC for +/-12VDC, 12VAC for +/-15VDC, 
etc.  Most AC wallwarts are way over voltage when not fully loaded and 
the smoothing caps bump up the voltage somewhat.  Use too high an input 
voltage and you'll need more heatsinking.

Seb