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    Electric Trains and The Third Rail

    So we're always told not to touch the third rail, as it's at a very high potential. Makes sense. But how does return current work in such a system? Let's say there is some load (the motor - we'll simplify and assume DC). One terminal of the motor is connected to the third rail, what's the...
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    Giant VU Meter Project

    Hello all, I'm a freshman electrical engineering student at the University of Kentucky. I'm also a DJ at http://wrfl881.org" [Broken]. I was browsing around the awe-inspiring http://www.blinkenlights.de/" at MIT. Now on our campus we have a convienently tall building atop which sits our...
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    Origin of PF

    How and when did these forums come into being? Are they run by a company, or individuals? Is it a hobby or business?
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    Universal laptop power supply?

    "Universal" laptop power supply? My father had an extra laptop lying around that despite being old and having had it's monitor seperate from it's chassis was in perfect working order. Or such was the case several months ago - I dusted it off today and it refused to start. I got out my...
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