Given that every PC has a powerful, well-regulated PSU that supplies, among other things, a 12 V rail, why not make use of it to produce a PSU variable from 1.25 to 10 V? Well, that’s just what we're proposing to do here. This power supply can also be used as an addition to a conventional bench supply in order to simulate an analogue voltage, if the bench supply has only one output.
July 19, 2010.
Correction.
There is a missing link in the circuit diagram: the junction of C2 and R1 should be shown as connected to the + terminal of K1.
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