These 2 Json-files can be imported in EasyEDA (https://easyeda.com/). To open the files go to folder icon in the top left corner of EasyEDA and select
“Open” then select “EasyEDA” then select both “.json” files.
The last time I made a PCB was 30 years ago on what is known as High School. So I am a bit rusty :-).
I made some small changes that, I think, don’t affect the working of the PCB.
Please have a look and look for faults, If you see room for improvements apply them.
Some extra info on why I did design it this way:
– H1 to H14, LED 1+2, U7 are drill holes so I can use wire to the connectors/switch