Last month, I gave a relatively long talk at the biweekly CPARC meeting on the principle of operation of diodes and three-five terminal devices. This included bipolar transistors, field effect transistors, and vacuum tubes ranging from triodes to pentodes.
Semiconductors, part 1 of 2:
Vacuum tubes, part 2 of 2:
Needless to say, there are numerous technical flubs made during this two hour long talk without notes. One that particularly stood out was that I managed to get the polarity of electrons wrong when I was explaining the suppressor grid of a pentode. Damn you Benjamin Franklin!
If you catch any other glaring flubs or mistakes, please feel free to post in the comments.