Hi,
I'm starting with semiconductor and my goal project is to make my own variable power supply and understand how it all works. I've been searching for schematics (without ICs, I attached one schematic). Here the supply's output is taken from the emitter of the power transistor. I think it resembles a common base configuration but in that configuration the emitter is supposed to be the input not the output, so can someone explain how is it working here?
Also any comments you may have on this schematic would be appreciated.