Thinking about it a bit more, perhaps he uses a double throw switch, which
both disconnects the 7805 from the PIC's Vdd lines and also shorts the
PIC's Vdd lines. The advantage of this is that it would also make sure that
any capacitors on the PIC's power pins were also shorted. You would also
need to be careful that there is no way the PIC could be receiving power
through it's IO pins (which is possible because of the protection diodes).

Sean

At 11:44 AM 1/19/2003 -0600, you wrote:
>Yeah, I don't understand what this means exactly.
>
>I was going to put a little switch in the ground line,
>or the trace, between my power jack and the 7805,
>
>is this OK, or is there a better more correct way...
>
>thanks

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