A device that can display all combinations of 4 (2x2) pixels 5cm2 (aprox. 1") with a ribbon that has 16x2 positions/pixels.
Eventually it will be a display that shows a paper pixel matrix of 8x8 pixels. with 16 (4x4) of these separate units. Every unit will be driven by a Arduino micro or nano and connected via i2c to a Uno or Mega.
First because i can and second i want to have a display that is both mechanical and holds its "value" when no power is supplied.
Before the closed loop version the previous version of the display had two strips wound around a single tube (bit like a cassette tape) with a gear in the middle to drive it. I thought the tension wouldn't be much of a problem considered its a fairly short strip, but at the ends of the strip it was to tight.