> I have only one power supply. It's called a battery. I cannot add a > second battery. This is on a vehicle.
well... you could get a dc-dc converter that takes 12v in and outputs 24v, like this http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_155695_-1 then, with 24v you could use a pair of resistors in a voltage divider circuit to get +/- 12v: http://en.wikipedia.org/wiki/Voltage_divider Another option is to use an 12->120v inverter and then use a computer power supply. ATX, for example, has +/- 12 volt outputs: http://jwenet.net/notebook/2005/1161.html /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
