saturno:
Can you (or anyone that knows) please give me the link to the MAX7219 library that I should use in this project?
The libraries I used for this project are in a file called 'WordClock Libraries.zip' attached to post #4
Good luck with the build, both my clocks are still working nicely. The one with the DS3231 is a lot more accurate than the DS1307 version but with code tweaking I have managed to get it within 2 minutes per year time drift.