3 ms·
How do you keep them in sync? I bet you're using an established time source.
by ndsipa_pomu 3y ago
How do you keep them in sync? I bet you're using an established time source.
- AnimalMuppet 3y agoWalk around with a wristwatch. Even if the watch isn't synced to something authoritative, you can still use it to get all the clocks the same as each other (and the watch).
- ndsipa_pomu 3y agoWhat if the watch runs fast - how do you synchronise the other clocks to an untrustworthy watch? For extra points, assume that the clocks are all in different rooms so you can only see one at a time and it takes an unknown number of seconds to go from one room to another.
- AnimalMuppet 3y agoThe easy answer is that the watch doesn't run that fast. If it runs, say, 10 seconds fast a day (which is a lot), then if walking from one room to the other takes a minute, the watch is off by... 0.007 seconds. I'm not going to be setting the clock that accurately. But if the clock just runs consistently fast (and if I know how fast it runs), then I can use the watch to measure how long it took to walk from one clock to the other, and from that I can compute the correct time to set the second clock to.
- ndsipa_pomu 3y agoHow could you know how fast it runs without comparing to an accurate time source? Maybe it's running slow and you don't even realise it.
- AnimalMuppet 3y agoWell, I can compare it to all the clocks. But, you know, if I have no accurate source of time, why do I bother having a watch and N clocks?
- ndsipa_pomu 3y agoYou're a clock collector?