I'd never given much thought to the idea of making a musical instrument before I set out on this project. Nor would I have had reason to expect much success, really, given that I'm practically tone deaf. But then I started to look at the waveforms involved – and that put sound into a framework with which I'm more familiar. In the end, I built a 5 note keyboard that I think actually sounds half decent.
In theory, remote controlled cars are great, but in practice they're just never quite exciting enough for me. That is, until I decided to attach a jet engine to one. Yes, you read that right – a jet engine.
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.