Though a bit off topic, the tech behind the swiss railway clock [1] might be of interest to anyone that hasn't read about it.<p>I escpecially enjoy this "low tech" approach to clock synchronization:<p>> The second hand is driven by an electrical motor independent of the master clock.<p>> It requires only about 58.5 seconds to circle the face, then the hand pauses briefly at the top of the clock.<p>> It starts a new rotation as soon as it receives the next minute impulse from the master clock<p>[1]: <a href="https://en.wikipedia.org/wiki/Swiss_railway_clock#Technology" rel="nofollow">https://en.wikipedia.org/wiki/Swiss_railway_clock#Technology</a>