DS3231 RTC (Real Time Clock) Module - Demonstration

This is a demo of the DS3231 Real Time Clock Module

Disclaimer:

The videos are short, because I am not, in most cases, narrating. If you would like a longer video, let me know in the comments section, and I will consider it.

Disclosure:

While clicking on the link for the product does not earn any revenue for me, I was compensated for shooting and uploading the video content.

Clicking on the link for the product does not earn any revenue for me.

Technical note: ALL timer chips have drift (error). The drift also varies with the temperature.

Here are the stats for the leading timer chips. PPM = Parts Per MIllion (drift)

Chip Specified PPM
DS3231 (N, SN) 2
DS3231M 5
DS1307 23
PCF8563 29

Here is how drift translates into actual time:

1 second per day = 11.5PPM Drift

12.96 seconds per month = 5PPM Drift

7.7 seconds per month = 3PPM Drift

5.1 seconds per month = 2PPM Drift

.0864 seconds per day = 1PPM Drift

Those numbers, by the way, can be positive OR negative, and have an error of +/- 2.5%

Although the DS3231M chip on paper has more drift, it could keep the same or better time as the "more accurate" DS3231N chip.

This is why an NTP time update call should be made periodically.