Finally my orderd PCB’s from jlcpcb.com are here. They have a very good quality for my prototype and with these PCB’s I save a lot of time in wireing

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Today I soldered the most parts in place.

It took me a while,why the LED^s didn’t work, but there is an error in my design
A missing connection between the 5V of the shift register and the Arduino was the error. Now, it works.

Shift register shifts and RTC outputs the time.

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In a few days, I will check the 8×5 multiplexer part and if I can control the “not yet existing” Led matrix.

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