I was reading the link that Luciano supplied regarding bipolar transistors. It mentions a second resistor tied to the positive side to ensure there is no negative voltage at the transistor. It also mentions this is not required, but it sounds like good practice.

Now, that link doesn't specifically talk about the transistor being driven by a PIC so I want to know if that second resistor is still good practice in that case or not?

I'm about finished designing my PCB and want to add anything I might need now and not try to fit it in later.

Thanks.

Bart