AVR RTC 32khz Crystal Test Board

Small Board includes Header for DS3231 Module to Test Drift and Compensation Routines for 32khz based RTC

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The DS3231 "Arduino" Board includes 4KB Ram to Save Data, you can easy compare seconds between both RTCs.. in same Time the Arduino Sketch gives Serial Output to the Rpi. I start Minicom with Fileoutput to copy the File to Public Webspace every 5 Minutes.

The Goal is to test the Internal RTC for Accuaracy smaller then 1 Minute in Month for Longtime Battery Logging (20uAh).

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