As I’m grabbing images online of Lilypad Arduino projects, I seem to keep coming across my own. This is one that I still need to post a video for, but I thought the concept was pretty silly: It’s a thin band worn around the neck, and the neck bends forward a guitar riff from some classic ACDC is played. As long as you continually headbang, you will continually hear heavy guitar! Pretty sweet, hm?