Re: AVR Scope Clock


 

On Fri, Dec 21, 2018 at 02:19 AM, John Clark wrote:


I found the clock was running fast, somewhere around 30-60 seconds per day.
Hi John,
Nice idea to use a BT-GPS. OTOH, 30 - 60 s/day fast is a suspiciously/impossibly large deviation for the built-in quartz crystal oscillator. 350-700 ppm?? No way...
Are you sure C3 and C4 (the two caps on the quartz crystal) are in? Your 20 MHz quartz could be defective as well, though not likely.

Raymond

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