Hi Redhatter,
I’m an electronic engineer who has been making / developing all sorts of hardware for 30 years. My boards are well tested by now.
If you want me to make you something just for general use I could adapt a previous design quite easily. I also have a good number of electronic parts if you need a more left-field application.
The design you link to is extremely limited in its abilities.
Rgds,
Steve McLevie