DS3231, alarms, backup battery, time talking ....
Absolute world unique, one of kind and world first wristwatch
powered with Supercapacitor
Two battery holders
(plastic diodes, resistant to damage against glass solar cell)
(You can use bigger capacity but 10F is optimal for charge in one sunny day)
TWO operation modes ...
One day is it dream, but it's not just a dream, it's just a vision of the near future ...
Make simple and reliable circuit