If you're looking for a weekend project, and you're especially computer savvy, how about building an Arduino-powered LED clock?
A person with a creative mind, identified only as "Tobias," developed a one-of-a-kind timekeeper, shown in the video above. The design incorporates 60 LED units, and hours, minutes and seconds can be displayed as a pattern of colors. An Arduino processor is the command center of the clock.
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If you're inspired to create your own, Tobias posted the step-by-step process online, including materials he used as well as a template. The project only cost him about $30 from materials on eBay. Note that the building process is not for every do-it-yourself warrior, however, and programming the device to work correctly may not be as easy as it looks. But if you're familiar with Arduino projects it could be right up your alley.
Tobias states on his site that his inspiration was industrial designer Bram Knaapen's Equinox Clock. Knaapen's similar Arduino-powered clock uses 60 RGB LED lights and has software that cycles through the colors of the rainbow twice a day.