This easy-to-build walking reindeer can be constructed with only a bow motor, battery, wires, and a few other parts.

A continuity tester that indicates the resistance of, say, PCB traces with musically-related tones, whose pitch changes with ...

There are plenty of lovely e-readers out on the market that come with an nice big e-paper display. There aren’t nearly as many that come with two. [Martin den Hoed] developed the Diptyx ...