Consider this instead - $19 from Radio Shack
http://tinyurl.com/l8tjv


wrote:
Can i take two wallwart power supplies (the AC to DC variety) and just
tie them together in series and parallel to make a cheap diy variable
powersupply.

I am thinking of getting a cheap variable DC 12V ($20 at Fry's), and
then adding a universal DC adapter with up to 12 v also. So if i wire
these in series or parallel or whatever, can i say add 3 v DC to 6 v Dc
to get a usable 9v DC? Or is there gonna be some law of electronics
broken?

thanks for your very expert consulting