Tjaart wrote:
> > Could you tie the ground connection to pin 4 instead of pin 5 to get the
> > legal voltage swing for transmitting to the PC?  (I mean if you adjusted
the
> > R values, set the control lines correctly at the PC end and go through
> > diodes just in case).
>
> You could. You could also use a driver chip.
> I have never, ever, ever had a problem with the circuit on my page.
> Why fix it if it ain't broke?

Well, because if you follow the spec you can have a greater level of
confidence that it will work even in the situations you didn't specifically
test.  As other people have mentioned, there are PCs out there which don't
accept 0-5v comm.  I was just wondering if you could with little extra
effort make it meet the voltage specs.  However, I wasn't criticizing.  I
appreciate your solution, and appreciate your sharing it with me.

Bruce Cannon
Style Management Systems
1228 Ceres ST Crockett CA 94525
(510) 787-6870
http://www.jps.net/bcannon

Remember: electronics is changing your world...for good!