Split Power supply in voltage and gnd? I am new to electronics and arduino in general. I need to split a power supply in gnd and voltage. Basically, the power supply has one single wire (with the voltage and the gnd passing through it i think), and I need them to be separated. Sorry if this is a noob question, but I am really new to this whole thing.
Do you have a image of this? Logically, and as far as I know, One wire will not carry both GND and Positive.

Are you talking of a DC jack kind of thing?

BTW, I'm starting out here too!