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Old 17 May 2020, 08:07   #4
cdh
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Join Date: Dec 2017
Location: Los Altos, CA, USA
Posts: 24
Without an oscilloscope, the best I can suggest is to do repeated cycles of
1) Set the RTC to the current time
2) Wait X minutes
3) See how far your RTC is off
4) Tweak VC190
until the difference is small enough that it's good for you.
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