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I finished one of the PSUs, this one a 0-38V 12A. All parts were
in the junk box, so it's a satisfying freebie. And this is one of those
times when it *is* an advantage to be able make your own PCBs

Wired to Vout is a PIC-based 4-digit LED display, also from parts
in the junk box. I used 7:1 input divider, 5.12V Vref and s/w to make
an FSD of 40.96V (40mV resolution) from the ADC result

3 x 1N4001 does reduce the LM317's base drive to 0V, so Vee
was not needed. A "6k72" pot gets Vout to maximum with no
ineffective top end of the track=

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