Runtime counter v. 2.1

Runtime counter v 2.1
This is a remake/update of the Runtime counter v 2.0 witch was made to count one time.

The purpose of this project is to make a Runtime counter for your machines like a 3D-printer or Laser module on a CNC machine or whatever kind of working time you wish to count and save. But now it has a added feature to keep track of the time you spend on a particular project, afterwards you can reset this time to zero for another project.

The power comes from:
AC to DC convertor 110-240V AC to 6V 600 mAmp DC.
6-24V pin of one of the machines, this is converted by the mini 360 stepdown buck converter to 5.5V for the microcontroller Pro Mini 5V (connect at RAW pin). The Pro Mini seems not like more voltage (I fried some on 9 and 12V). The Nano can handle up to 12V.
5V direct to micro controller on VIN, RAW, or VCC pin.
All other components are powered by the VCC or +5V pin of the Pro Mini and Nano.

Changelog:
Version 2.0 (October 2022)
The Fram FM25L16B-GTR is r