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Gracias a todos por vuestros comentarios y reconocimientos...
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Forget the "data" line (not ethernet), and a couple of bucks for the first 5 then .35 cents a minute - it's worthless. On the other hand, good power options and you get a nice cube to spread out in.
Sure electronics 6416 LED matrix.. random brightness values 2 or 3 bits of PWM per channel (Red + Green)
Hehe.. Refresh rate of 60Hz had to be quadrupled to get it working without flicker