Sometimes its worth venturing out to a disorganized surplus store to see what you can find. This is my latest little toy.
Its a fragment of a pixelboard. Alternate the currents from one pin to the other and you can make the yellow dots flip to black. The cool thing is even powerless it keeps its state. If you manually flip the pixel to the other side it returns based on the magnetic pull.
The guys at the store obtained it from a signage company that was dumping their old stock for TV screens. The destroyed all of the control boards because it was proprietary technology (just a couple relays I’m thinking). The larger versions of these pixelboards also come with LEDs to illuminate the structure.
In the photo above I’ve hooked the pixelboard up to an IR Rangefinder so it could light up based on distance of an object infront of the sensor.
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