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To help keep her dog Tucker warm and visible at night, Hack Pittsburgh member Val made him this awesome light-up dog hoodie. After fashioning a hoodie for him using her leet sewing skills, complete with a silk-screened skull for decoration, she added a light-detection circuit that turns on a set of LEDs when it gets dark out, ensuing that he will remain visible at all times. She had originally planned to use a Lilypad to control the LEDs, but after some experimentation determined that it would be too big to fit on the small dog. Excellent work! She has a short write-up on her website, and a walk-through of the process on her Flickr set.