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 Don’t choose to aim for the stars because they mark the peak of our abilities, don’t choose to aim for the stars because it is easy, choose to aim for the stars because it shows the depth of our potential; choose to aim for the stars because it is hard! - Ken Leung [more] |
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#3
05-09-2006, 18:30
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Re: Conifirming somthing
The black wire is generally called "ground".
There is no explicit negative current. A piezo may be suited for this kind of application. But I'm not an electrical person, do your own digging. 
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