Time accuracy?

[Daniel Wilson]

Hi Group,

I was wondering if anybody has tested time drift on this logger? I was hoping to build a modification with an expanded battery pack to last ~1 year, and I was wondering what kind of drift to expect?

Thanks,

Danny

[Steve Chamberlin]

Good question. The hardware counts the number of oscillations of a 32768 Hz crystal, which is a very common part used in electronic timing applications. You might find some data on accuracy in the ATMEGA328 datasheet, but I would expect it to be similar to something like a digital watch.

FYI, my Logger Classic ran for about two years with the standard CR2032 battery. http://www.bigmessowires.com/2013/06/06/backwoods-logger-battery-life/

Steve

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