Mitch writes in about Greg Blonder, who made this prototype slide rule clock with LEGO Mindstorms. The positioning of the two rules makes up the hours and minutes. I like the idea of sketching in a platform like Mindstorms; it sure beats building an entire custom circuit just for a proof-of-concept prototype.

becky stern headshot Slide rule clock prototype

Becky Stern

Becky Stern is director of wearable electronics at Adafruit Industries. Her personal site:

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