There are 12 numbers around the clock face, and each interval is 5 minutes, so there are 12 × 5 = 60 minutes in an hour. Let's use this knowledge to tell the time on the clocks below. This clock ...

So next time you check the time, you’ll know that “o’clock” is a charming relic from a time when people needed to distinguish between different ways of telling time!

But it’s a good-looking clock, no? Just as before, an ATtiny85 is the brain, with an RTC chip and an oscillator to keep time. But now, the display involves negative space 3D-printed numbers and ...

Two Colorado-based researchers proposed a solution in a recently published scientific paper involving clocks floating in ...