EDIT: Here is the tutorial I used. Another member on here, can't remember who, recommended this one to me.
Last edited by Imperialkid; 03-03-2012 at 12:09 AM. Reason: Added the tutorial I used.
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Voltage is a difference of electrical potential so if you have one point at -12 and the other at +3.3 then the difference between them is what you would measure - or 15.3v (give or take). If you measure to ground from either supply you would naturally measure the difference between -12 and 0 or 3.3 and 0.
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Hmmm.. but what of the current if the power supply says...
Does this mean you are actually limited to 2.0A @ 15.3 v??
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