On Saturday 03 May 2003 18:58, Herbert Graf scribbled:
> > Hi Picdude-
> >
> > I have to disagree with Mike, its ok to connect like you propose AS L=
ONG
> > AS the power supply and PIC circuit are otherwise isolated.
> >
> > I have done this myself.  I used a 12V car tail-light as a 5V ballast=
=2E
> >  I also transferred the fan from the 12V supply to the 5V supply, whi=
ch
> > made it much less noisy as I don't think heat will be a problem at 12=
0
> > mA ;-)
>
>         I'd have to agree, many power supplies deal with the "no load"
> issue, and the ones that don't do not need a load anywhere near 50W to =
be
> usable. Only way to know for sure on a particular supply is to try it o=
ut.
> I regularly use an old AT power supply as my "breadboard" power supply.
> TTYL


I've tested the voltage (17V diff I'm using) with and without a 5V load a=
nd no=20
difference, leading me to conclude that the load is not required.  I used=
 2 x=20
1-ohm 25W resistor in series, so 2.5A draw.

Cheers,
-Neil.

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