[mindslight]

Coming from an EE background and doing some simple hydraulics work, it blew my mind that the various components are mainly just the right shapes of metal. In retrospect I don't know what else I could have been expecting, except that electronic components are generally made of some special substance. Talk about actual "bare metal" development.

[ssl-3]

Coming from a generalist technical background: It's all just waves, interacting with stuff in useful ways.

[agumonkey]

Yeah, I found some 50s ee book teaching how to build variable inductors and caps, and it's mostly geometric relationship with a pivot.