dpst switch wiring to get 7v/12v

[bixit_62]

hey all
have a DPST switch, a double pole single throw.
how would would i wire this so that it would switch between 7v and 12v?
the switch is to be used on a 92mm tornado, and the switch is rated at 3A at 125vac,
thank you.

 

[sangram]

Wire the fan black wire to the center, common negative.

Then wire one end (comA) of the DPST to the black on the power supply molex (0v), and the other end (comB) to the red wire (5v) on the same molex.

The fan positive red wire should be connected to the molex yellow wire (12V). One position will yield 12-0 = 12 Volts, the other will yield 12-5 = 7volts.

I hope that wsn't horribly confusing.

 

[SavageBasher]

Actually that's a double pole double throw.