Standing in the Gare du Nord train station in Paris in 2012, Dorrian Porter was transfixed by a sign. The station’s arrivals and departures board—a classic split-flap analog sign that constantly turns ...
As cool as split-flap clocks and displays are, they do have a few disadvantages. The mechanism sticks out on the side, and the whole thing relies on gravity. Some people don’t care for the visual ...
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