Here’s a cool MP3 DIY project that only plays music when motion is detected. This could be great for making yourself constantly active and losing those useless calories pulling your life down.
Of course, my wish is that you could make a similar MP3 player that also “powers itself” with kinetic energy generated while you work out, that would be a really cool eco-gadget to carry with you whenever you go running, biking, etc…etc…
video://www.youtube.com/watch?v=d7ozYBGHlto
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