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Electronics for dummies? I need something very simple. There is one switch and two wires. When the switch is open, I want wire A to be grounded and wire B floating, when the switch is closed, Wire B should be grounded and wire A floating. Simple as that. What's the very very easiest way to achieve this (preferably using household equipment)? [more inside]
posted by grahamwell on Dec 26, 2006 - 6 answers

Timer and Control Circuit. I need to measure the rotation of a spindle and the time during which a circuit is thrown open during that rotation. I think I need a clock, a counter and a software interface. Where do I start? [more inside]
posted by grahamwell on Nov 25, 2006 - 4 answers

Why are Capacitors so common in electrical circuits? [more inside]
posted by grahamwell on Aug 17, 2005 - 12 answers