Fun thread about electronics notation history. No, really! https://twitter.com/TubeTimeUS/status/1249023089528078337">https://twitter.com/TubeTimeU...

Fun personal history fact related to the IBM transistor symbol that @kenshirriff points out in this tweet -- that, along with some bad textbook diagrams, confused me a lot in high school electronics class, a million years ago. https://twitter.com/kenshirriff/status/1249089441546854400">https://twitter.com/kenshirri...

The fact that that symbol is symmetric, but real transistors are not, was a source of much consternation for me in high school electronics class. That simplified diagram is everywhere, but actual transistors don& #39;t work like that, collectors and emitters are different.

But there are good references on line -- see e.g. here:
https://www.ibiblio.org/kuphaldt/electricCircuits/Semi/SEMI_2.html

Around">https://www.ibiblio.org/kuphaldt/... 2/3 of the way down, there& #39;s a much better picture.

(I seem to have mangled this thread in twitter, hopefully the basic idea is intact...)