A non GPS method of time keeping and calibration ? (U3's etc) ?

Andy Brilleaux <punkbiscuit@...>

I was just looking at real time clock modules for Raspberry Pi's and had a thought.

These tiny RTC modules often have outputs at 32Khz and 1Hz, are tiny and sell for about 1.25 £/$/euro !!

I wonder if the 1pps is good enough to a U3S disciplined for general purpose use.

Yeah I know a GPS system is the ultimate, but something this cheap for general use might be "good enough".

Thoughts anyone ?

73 de Andy

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