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These RGB Pixels look like they are fun to work with since they are so versatile. Tobias Floery is having some fun building an RGB Pixel Clock using a string of them. You can see the 3 parts of the project linked to below. Tobias is using a real time clock connected to an Arduino to keep accurate time, he found a good library for controlling the LED Pixels and to mount it he had a custom laser cut mounting plate made. Everything is available on his site if you are interested in making your own version.
Part 1 of RGB Pixel Clock Build
Part 2 of RGB Pixel Clock Build
Part 3 of RGB Pixel Clock Build