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JChristensen / DS3232RTC

Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks
GNU General Public License v3.0
394 stars 137 forks source link

RTC not accurate time #86

Closed Geeker3D closed 3 years ago

Geeker3D commented 3 years ago

Just completed making Lazy 7 One clock published by parallyze . Uses DS3232RTC library. Seems that the clock runs to fast. Is there any paramaters that the user can change that it would change the speed of the clock itself.

JChristensen commented 3 years ago

Normally DS3231/32 are very accurate. See the datasheet; there is an Aging Offset register that can compensate about ±10ppm or so, but I've never had a reason to use it. More than likely the issue is either bad code or a bad part (or more likely a counterfeit part.) Authentic DS3231s are currently going for $9-10USD in single quantities. If it cost less than that, then it's probably not an authentic part and I wouldn't be surprised if it didn't operate to spec.

Geeker3D commented 3 years ago

Thank you Jack. You mentioned it might not be authentic. Your probably right. Ill reorder and try another. Thanks again

On Sat, Jan 16, 2021, 10:11 AM Jack Christensen notifications@github.com wrote:

Normally DS3231/32 are very accurate. See the datasheet; there is an Aging Offset register that can compensate about ±10ppm or so, but I've never had a reason to use it. More than likely the issue is either bad code or a bad part (or more likely a counterfeit part.) Authentic DS3231s are currently going for $9-10USD in single quantities. If it cost less than that, then it's probably not an authentic part and I wouldn't be surprised if it didn't operate to spec.

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