The complete schematic for building Arduino LED Clock is shown in the image given below: As you can see, this circuit diagram has two parts, first one is the main circuit that consists of an Arduino ...

That project also contains DCF77, the same sensors, RTC ... wiring all modules & sensors Schematic_Nixie Clock_2021-12-28_Sheet_4.pdf - wiring LED's The most important part is sheet 3 where you can ...