On Saturday, Feb 28, 2004, at 08:38 US/Pacific, Gustaf J. Barkstrom
wrote:

>
>> The interesting question is what you use to connect the two V+
>> planes, assuming you don't want two completely separate power
>> supplies...
>
> Is that possible?  Could you describe an example of how that would be
> done?
> I don't mind putting two supplies in, and I'm considering using a
> larger box
> for this project; perhaps with cooling fans and some heat sinks.
>
Of course it's POSSIBLE.  It's the logical equivalent of the noise
filter
and surge protection you find at the inputs of most switching power
supplies.
Or think of it as powering your PIC through a low-pass filter.  An
inductor
connecting the power supplies, with local capacitance on each side,
should
do pretty well, with the usual "bigger is better, except for real life"
provisos.  For some circuits, the inductance and existing bypass caps
might
be enough.  For other circuits, you need to be more agressive...

BillW

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