Choosing the right module

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Dan_Maris
 
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Choosing the right module

Post by Dan_Maris »

Hello,
Which one of the clock modules is the most precise and losing the least amount of seconds by the time? Regardless of the price.

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adafruit_support_bill
 
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Re: Choosing the right module

Post by adafruit_support_bill »

For self-contained RTC modules, the DS3231 is the most accurate and lowest drift one we carry.

There are chip-scale atomic clock modules out there. Microchip makes one that lists for about $5K.

For more reasonably priced atomic clock accuracy with no drift, you can use a GPS module - provided that you have a clear view of the sky.

WiFi is another option, since most network time servers use GPS receivers as a reference time-base.

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Dan_Maris
 
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Re: Choosing the right module

Post by Dan_Maris »

adafruit_support_bill wrote:For self-contained RTC modules, the DS3231 is the most accurate and lowest drift one we carry.
Thank you! Is it more accurate then ChronoDot v2.1?

Also is it better to use rechargable or non-rechargable batteries for these modules? Do they charge the battery?

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adafruit_support_bill
 
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Re: Choosing the right module

Post by adafruit_support_bill »

The Chronodot is also based on the DS3231, so the accuracy should be the same as our DS3231 breakout board.
The DS3231 does not include a charge control circuit. The battery terminals are input only.

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