This PSU was realized in 2000 and It was really useful, the description below is just for information and no detail is provided for its realisation.

The characteristics :

- One Output positive programmable 3 to 15V 1.5A max

- One Output negative programmable -3 to -15V 1.5A max

- One output fixed at +15V 1A max

- One output fixed at -15V 1A max

- One output fixed at 5V 1A max

This PSU was build with two transformers 2x9V 50VA with rectifier and capacitors

The regulations were done with LM317 /LM337 for the programmable output with 10 turns potentiometers,

The others with LM7805, LM7815, LM7915.

The display of the voltages and currents was done with a PIC16F84 and an PIC 12F675 with ADC ...