A pair of Arduinos control the clock with the high-accuracy DS3231 module keeping track of time, and [Moritz] built a light box to house the electronics and provide diffuse illumination to the ...

A while back we saw a logic clock that used the alternating current frequency from the power grid to keep time. We asked for ... it hits the bridge rectifier, using a 100K resistor and a zener ...

The hands move and point to the numbers to show what time it is. Digital clocks show the time using numbers on a screen ... has travelled halfway around the clock. 30 minutes is half of one ...