This is neat! Is there a list of simple DIY hardware projects somewhere? I have a 3D printer and a bunch of microcontrollers laying around that don't get much use.
But https://hackaday.com/ features sometimes nice DIY project, I often also see them popping up on youtube. But you might be able to find some if you search on 3D printing websites such as https://www.printables.com/
> And as a bonus, an explanation about transistors from 1953
And here is a 1959 video from the same source about wave behavior [1].
It covers reflection from open and closed ends, superposition, standing waves and resonance, impedance mismatching, and tapered-section transformers all in a way that makes it really easy to understand.
About the Strowager Switch, which was invented by an undertaker who was fed up with the local telephone operators whom he suspected of diverting phone calls to his competitor.
Searching "YubiKey" brings me here: https://wiki.archlinux.org/title/YubiKey#Linux_user_authenti.... It seems to describe your exact use case.
Of course it has a lot of info about Wayland vs. X too, etc.