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If I wanted to make my own clock, what's the best low power method of reading the time data? Are there some sort of ultra low power chips that can run on just w little solar panel?



I have an "atomic clock" that receives WWVB and runs for years on 2 AA batteries. It's 20 years old so what you want is eminently doable.


I retrofitted a WWVB clock movement in my kitchen clock. It's quite nice not having to set it up when changing the battery or when DST shows up.


https://www.amazon.com/CANADUINO-Atomic-Clock-Receiver-60kHz...

then the rest of it is basics for small PV charge controller, dc-dc converter, battery (such as to keep one good quality 18650 at an 85% float voltage)


Your amazon link shows 'unavailable'. The original source has a number of WWVB receiver products: https://www.universal-solder.ca/product-category/atomic-cloc...

I purchased the Everset ES-100 dev kit from them last year, but haven't put it together yet. I am curious how much better the BPSK decoder for WWVB will work in Eastern Canada.




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