> Has anyone here ever made/seen a variable output switching power supply
> (possibly using a PIC as the controller)?  Not just a couple of fixed
voltages
> (3.3 & 5v), but more like a variable linear supply (like one controlled by
a
> simple LM350T circuit).
>
> Since my knowledge of switching power supplies is nearly nill, I'm not
even sure
> if this is possible....

Yes, it's possible and I've seen it.  In a previous life I worked for HP in
New Jersey.  One of the products of that division was "lab" switching power
supplies that had knobs for adjusting the voltage and stuff.  These
adjustments and readbacks could also be made by a computer.  The nice thing
about adjustable switching power supplies is that the power transfer is
roughly constant so you have more current available at the lower voltages.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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