>> I see opinions that solar tracking doesn't need that much accuracy

yes, but the usual behavior you get with a simple microcontroller crystal-b=
ased timer is a continuous drift in one direction.  If I did my math right,=
 a 1% inaccuracy in the timer makes your time be off by over 7 hours after =
a month of operation, which is quite bad for solar tracking purposes=85

BillW


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