The Mindstorms NXT gramophone, or, If Edison played with LEGOs

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Andrew @ Nov 23rd 2007 12:32AM

you can play a vinyl with your fingernail (provided its sharp enough)

pretty much the vibrations are etched into the record, and they vibrate (usually) a diamond which vibrates back and fourth creating (in a way) AC electricity, which is applied to speakers. Thats VERY simplistic, theres lots of innards there that allow the vibrations to be converted to usable current and amplified and the such. If you think about it, records are actually really cool.

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