> I second the "Not what the OP asked for but still...".  With a transforme=
r I pulled
> out some old appliance, an LM317, a few diodes and resistors, a potentiom=
eter and a
> switch I made my own power supply in an evening.  I just use my voltmeter=
 to set the
> voltage I need for any given application.  Save for the LM317 and a bit o=
f
> perfboard, everything else could easily be pulled out of some other broke=
n piece of
> household electronics.  So my total cost was around $1.50.

In the longer term I would add one of those digital voltmeter boards (can y=
ou still get them) that used a 40 pin LSI and 4 digit 7 segment display, so=
 you have a permanent voltmeter on the output.

For extra brownie points make a project out of a PIC that has a 12 bit ADC,=
 and a keypad for setting the voltage, and maybe also current limit, and be=
 able to display both current and voltage.


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