dennis_arduinouser:
I found some guides on the internet on how to build an arduino. But i couldn't find anything about building your own rtc. I have a few ds3231 rtcs and they are great build i would prefer to build my own now. My question is does anyone have an idea how? Because i want to keep the project small i wanted to add a better crystal to the arduino but don't know enough about it. What should i do to build my own rtc?
Look here
Reading the Temperature from the DS3231 & DS18B20
http://kevinrye.net/index_files/reading_the_temp_ds3231_and_ds18b20.php