Stephen Hobley built a fully working Jean Michel Jarre laser harp:
Which is pretty awesome, and he’s doing DIY explanations for those attempting to build one!
If you don’t know what Jean Michel Jarre I’m talking about, here… I have no doubt you’ll end up recognizing the music:
And here, a video with the laser harp part only, for the less patient ones:
Source: I think it was Gizmodo (I was just reminded about this on an unrelated post.. :P)… thing is: I was absolutely shure I posted this sometime ago, but for some reason, couldn’t find it… so I’m reposting. But do check out more about it at Stephen Hobley’s website.