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by galvan 4578 days ago
I have the DIY version [0] of this on the back of my monitor right now, and the effect is quite nice, especially when playing games. The total DIY cost was $30 in components, namely a Teensy 2.0 microcontroller and a WS2801 RGB pixel string from eBay (unfortunately, I don't have nice mounting hardware so they're just stuck in cardboard strips).

[0] http://learn.adafruit.com/adalight-diy-ambient-tv-lighting/o...