Pitch Control:A range finder was installed on the Prism's neck to provide a Theramin-like effect of pitch bending. Instructables
Building your own guitar or synthesizer is impressive enough. But when you decide to smash the two music makers together -- and throw some lasers in for kicks -- the end result is the jaw-droppingly awesome "Prism."
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.