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Check out this awesome project from SparkFun customer Rob Seward. This is a pretty amazing combination of robotics and electrical engineering to create a project that can really be most accurately described as art.
A side view of "Four Letter Words" reveals some cool mechanical bits.
Rob's project, "Four Letter Words," consists of four units, each capable of displaying all 26 letters of the alphabet by arranging fluorescent lights in the right shape. The device is running on SparkFun's Arduino Pro. The words that are displayed are based on a word association database developed over a period of 22 years by the University of South Florida. Check out the video below to see Rob's project in action - awesome work!