This is my PSU auto built when I was 16, in '90, with the PCB designed by hand with pen.
Later in '97 I've upgraded it drawing a new PCB in AutoCAD and developing with UV. Added also the digital voltmeter as a kind of switch to use the voltmeter with a secondary input (the one on the left). Changed also final transistors with mosfets.
It is based on a "Nuova Elettronica" schematic.
After many years it is still working