Simple Optical Microphone/Pickup

This is another mini-project that began, like so many have, in a discussion with Scott over some beer. We wanted to build a new kind of speaker amplifier, which used mechanical closed-loop feedback to position the speaker cone exactly where the audio signal says it should be. We figured that, if done right, this could yield higher audio quality from cheaper speakers. So, that idea is pretty crazy, but it seemed just barely plausible enough that I... Read More