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mason bee hotel
Computer case beehive
This is awesome! I had no idea until I read about it in another instructable that links to this one. I used alligator clips attached to the plug of a little battery-powered speaker set (external speakers meant for mp3 players and the like). I did not recognize the tune, but it definitely was music!Speaking of curiousity, I once put a data CD into my CD player in hope of getting some weird fax-machine-type sounds (no, it did not work, unfortunately). I have to say that if I had found this on my own (with a light microphone, say), I would have been surprised enough to doubt my perception. ;-)Now I'm going to try it again with earphones and see if I can recognize the tune.
Listen to a led tea light
This great! I plan on using it as a classroom demonstration.
make pictures with polarized light from an LCD
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