Peter Hansen <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > All true, but then Jay might get into electrical compatibility issues, > and may not realize that the output levels of RS-232 serial hardware > are not simply 0 and 5V levels, but rather +9V (or so) and -9V (and > with variations from 6V up to 13V seen in the wild), and without much > in the way of drive capability. Using this to control custom hardware > would probably be an exercise in frustration and kind of pointless in > comparison to using parallel hardware, which at least has more typical > logic voltage levels.
You can get ICs that convert RS232 to TTL voltage levels. -- http://mail.python.org/mailman/listinfo/python-list
