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Using two power sources to create +/- voltage

Question asked by palumr on Oct 21, 2010
Latest reply on Oct 22, 2010 by Raclegg
I'm a newbie to power sources, and I'm wondering what the set up is to create positive and negative voltages using two power sources. I have seen the setup before and know it involves connecting a common ground between them, but could anyone please show me a picture or describe the setup? I'm not sure of the model, but I'm talking about the power supplies that have +,gnd,and - connections.