DC/DC and Negative Voltage
What is everyone who is building DC/DC power supplies doing for the -5 and -12 voltages? Are you just not hooking these up? Does anyone know of a DC/DC supply I could buy that has these voltages? I've looked at the National Semiconductor evaluation boards and don't see anything that produces negative voltages. I need to make sure that my serial ports work, I don't know whether my video card will require these or not.
This is the one I'm using...
I have some links to some other places to get DC/DC supplies on my links page:
<a href="http://www.sunflower.com/~jahelka/MobileMP3/">My MobileMP3</a>
go buy a surplus dc to dc inverter with isolated outputs. They're cheap (under $5.00) since you don't need much current (say under 0.3A). They're used a lot on LAN cards. Simple solution in a sealed a small (1.5" x 1" x 0.5") package.