Just wondering what other people have found as far as accuracy of internal oscillators on the pics. I just completed my version of a binary/decade clock using the 16F627 and after 5 days of running it was spot on (within 1 sec)! I was pleasantly suprised. I started with a simple counter, but accuracy was not that great (sub routine dependent). When I used the ISR, it was much better.

Over the week of running I found a +/- drift of less than 84 seconds.

Mike

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