The MiniPOV is an Adafruit toy that provides a discreet package for POV (persistence of vision) display. Normally, POV displays involve lights that are mounted to a moving arm or wheel. As the lights are swept across a person's field of vision, the slow response time of our vision receptors causes us to detect the changing light patterns as an image.
The MiniPOV depends on a person to provide the motion. Instead of being mounted to a moving object, the user holds it in his or her hand and sweeps it through an arc, providing the motion.
That's pretty cool, but it's also kinda small- it fits into an Altoid tin. I'd like to make a larger one- say, 12" long, with one LED every half- or quarter-inch. My deeply subversive application is to press this up against the window of my bus as it drives past all the suckers stuck in traffic on the highway, flashing a message to hopefully get them to consider some alternative to single-commuter driving.