Usual Suspect wrote in message
obal.net...
I want to build a bench power supply, and am looking 'round the net for a
good circuit.

Requirements: 2 outputs, adjustable v, adjustable i, v & i meters (or
digits). Prefer 30v max, or similar. Preset v selections (5, 12, 15, etc.)
would be nice.

Here's one I found, complete with the designer's smiling face on each
circuit
illustration:

http://members.shaw.ca/roma/supply-4.html

What's your favorite circuit? Features you like that I haven't mentioned?

Thanks,
--
Al, the usual


Assuming your 2 supplies are from isolated secondaries or separate mains
transformers and the outputs will parallel, then series/isolated
pair/parallel switch is easy to add to double volts or current range (single
rail).
If for repair or soak testing then something I would have had a use for is a
presettable current monitor that sounds a sounder if the current drain goes
above or below a settable amount from the initial free, ie below any current
limit , current drain, for instability/thermal/intermittant fault checks

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/