3-probe temperature microSD logger
Project tutorial by pentiumcadiz
Keeping an eye on a pool.
Project showcase by pentiumcadiz
A clock, controlled by a RTC module, that you can see on a 4-digit display.
I think I used one of the sketches included within the DS1307RTC Arduino Libraries.
Let me check it, and I will share the code here.
The DS1307 module is designed to give accurate digital information (up to seconds). I am not sure it is a good tool to control angular velocity (analog).
As soon as I have read, the CR2032 battery will keep it alive longer than 5 years. Not bad for a present :-)
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