DIY motion feedback MP3 player gets louder as you jump rope and do stuff (video)

DIY Motion Feedback MP3 player gets louder as you jump rope and do other stuff (video)
Music helps the weary exerciser work harder and, according to a hacker named Steve, the louder the music the more vigorously you work. So, he grabbed a motion sensor and an DIY MP3 player, stuffed them both into a disused French Vanilla Cafe coffehouse beverage drink container (ooh, la la), then wired the works together to pump out the jams louder when you're really burning those calories -- or to get quieter when you stop for a breather. It's all fearlessly demonstrated in a video after the break featuring Steve, a jump rope, and a little bit of Bono. Make sure you stay through the credits for a deleted scene!