Power supply polarity??? Help!

[suprleed]

This is kind of a noob question, but on a 2.1mm wall wart output jack, is the inside polarity what's going to ground in your circuit?  In other words, if I have an negative ground circuit do I want negative polarity on the inside of my power output jack?  I'm trying to figure out if I bought the wrong power supply for my next project. 

Thanks.

[davent]

Hello,
This should help clear up any pedal PS questions.

http://www.beavisaudio.com/techpages/PedalPower/

dave

[R.G.]

Use your DMM set to ohms to tell which contact goes to signal ground in your pedal. It could - and has been - both for different pedals.