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Microphone how?

I was wondering, How could I turn an old speaker into a microphone?

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How could I turn an old speaker into a microphone?

You speak to it like if it was a microphone. =o)
And it's not a joke !
Search and Look at my "magnet powered telephone" instructable. (The magnets are the ones in the speakers)
Goodhart9 years ago
and here is the kind of thing Chooseausername is speaking of: ALL speakers are Microphones......