LED Writing
It’s hardly original, but I thought I’d have a go at drawing stuff in the air using LEDs. I whipped up some “drawies” using a button cell and an LED with a little piece of plastic, such that the LED activates when I press down on it.
I then got some requests from IRC and got to work:
i use these in raves as a replacement for glowsticking
alex mccown said this on June 15th, 2008 at 8:18 am