For my bench power supply, I am willing to make a voltage divider with two potentiometers (for coarse and fine tuning). I think I got the schematic right but what I am not sure about is the influence of resistors scaling.
Here is my schematic sample:
I think my schematic is working in theory, but it would also work with R1 and R2 at 500k. Or R3 at 100k and R4 at 1M, and so on... In theory, the resistors scaling always give the same result (at my knowledge level -> beginner).
From my search results, it only seems to influence the output impedance of my PSU but I don't understand what it means practically?