|Depending on the situation, you can also send it just using the PIC
|itself, and invert the output logic level. Not something I'd reccomend
|for industrial environments, but it works. The common 232 receivers
|don't need negative voltage, just <1V, and they need at least 3V on the
|high side.

The big thing to note when trying to send serial "directly"
between an RS-232 port (like the PC) and the PIC is that the
effective rise times and effective fall times won't match;
this isn't generally a problem at slower baud rates, and it
may to a fair extent be corrected in software, but don't ex-
pect to go 115,200 baud without having to tweak things a little
bit...