[url=http://arstechnica.com/civis/viewtopic.php?p=29944645#p29944645:2c9cfkq5 said: kriket011[/url]":2c9cfkq5]It could be useful in a situation when one needs to ...
The reason he's using negative 220 volts (he could just as easily have made it +220 by reversing the leads) is that he's pulling the GND down. The GND connection is the only thing that's common to all ...
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