Seven segment displays and Nixies are one thing, but the king of all antique display technologies must be electromechanical flip dots. These displays, usually found in train stations or rarely on old bus lines, are an array of physical disks, black on one side, light on the other, that ‘flip’ back and forth with the help of an electromagnet. They’re expensive and impressive, driving them is a pain, but oh man do they look awesome. While flip dot displays can be bought new if you know where to look, [sjm4306] had the idea to build his own out of inexpensive …read more http://pje.fyi/PNKX86

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