Could you post a schematic for your little buffer when you build it?
I've been thinking about building one myself, and it would be nice to
see how someone else approached it.

Thanks,

Josh
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Larry Bradley wrote:
> I'm going to hook up an octal buffer as an isolator between the parallel
> port cable and the PIC pins. The parallel port pins have a 4.7k resistor
> from +5 to the pin, and a transistor to ground. Thus your circuit  being
> monitored will have some voltage applied. I stick a 1k resistor in series,
> which works OK, but I think the buffer is a better idea.

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