that makes the clock a bit easier to use. It sits on top of the Dekaclock and automatically sets the correct time using a GPS receiver. It also keeps track of the time displayed by the dekatrons ...

The ESP8266 combines the timestamp from the GPS messages and the PPS signal to synchronize itself with the atomic clock aboard the orbiting satellite. To prevent the system from drifting too far ...

Have you heard of optical atomic clocks? Precision timekeeping is moving on from atomic clocks, which use cesium atoms cooled ...