Wemos D1 mini & Max7219 Clock

This is a clock project using Wemos D1 mini and Max7219 LED matrix display. And all this twice, so that I can monitor the time in both UTC and CET time at the same time. The whole project requires programming via the Arduino IDE (the code is in the link below, UTC or CET is not a condition, other time zones can be defined in the code. Of course, 3D printing is needed :D and a little soldering. A DC-DC converter is not needed, then the hours connects to 5V. Using the LM2596, a source from 4.5V to 40V can be connected to the clock.I used this project to power my clock. But this is not a requirement and you can choose from many other projects or create your own. https://github.com/ammerscm68/LED-Matrix-Rolling-Clock-with-ESP8266Version A:This version has a body cover without modifications and therefore does not allow the use of a microswitch. I recommend printing version B.Version B:This version has extra holes on the body cover to insert two M4 nuts (nuts are inserted during printing). T