I have long time considered how to build digital watch. Now I am ready for this. I did not wanted to do it without real time clock (DS1302). So ordered some from china and now I got them
I put together first prototype and it works nice
So RTC gives me time
DS1302RTC is connected to Arduino. Later I will design my own board and going to use Atmega328PU. Battary keeps time even external power is down.
At the moment this is my fancy user interface. Later I will use LCD or OLED
