Circuits out of an old notebook

So I decided to insert some basic electronic circuits in the place of the instruments I plan to build. We need some experience using the breadboard and turning the results into usable circuits.

I'm using an old notebook from college, here, pulling out some things that are badly drawn and letting ChatGPT re-imagine them as comprehensible images. The first one is just a basic potentiometer circuit, like this one:

Don't blame the AI for the bad drawing: I just scanned it quickly with my webcam and asked the tool to faithfully reproduce this -- and, well, it did. My Fritzing skills were very underdeveloped at this point.

So this is my next challange. Starting on this one as soon as I have time.