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Haha, good for increasing your arm strength. There does seem to be some slightly more portable ones:

http://www.microsemi.com/products/timing-synchronization-sys...

Also you can get fairly cheap rubidium clocks from ebay that tend to output around 10MHz for fairly cheap. They would be less accurate that the one he's sporting however.



Yeah, someone's doing a Kickstarter for an atomic watch based on a similar module but they seem to have sold out of them already: https://www.kickstarter.com/projects/846511652/the-worlds-fi...


Can someone explain me use of those atomic watches... with analog displays and tuned by hand?


The idea is not that it knows the time, but that it keeps time well. It just has a very accurate measure of how long a second is.


Wow, I'm curious how much the actual chip from Microsemi itself costs.




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