A micro switch turns on when you are tuning at the end of the roller inductor. Very easy to implement, and it did not require any code changes – just old school wire tie, two part epoxy and a LED.
I will put the Raspberry Pi W and voltage control on this polycarbonite project case.
OK – now I really am done with all of the hardware and software parts of this project. Now I just have to package it all up and write the article and create a slide deck with embedded videos for my presentation(s).