An interesting wall clock prototype inspired by a slide rule - Blonder Slide Rule Wall Clock. Hours and minutes on separate rulers, meet at a central slider with retrograde motion for each cycle. Powered by LEGO Mindstorms(right of pic). The base of the clock was constructed from standard LEGOs, encasing two mindstorm servo motors. At the corners of the base are four switches, used to support the "slider". By pressing the corners of the slider its possible to set the hours and minutes. See the below video showing it in action. [ link ] - Rendering page.
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