How can I put together a discrete RS-232 level translator?
Dan Michaels email (remove spam text)
>So I'd like to get some advise about wiring a transistor switch to switch
>the -12V available on DTR instead of passing 0V. So that 5V will pass 5V but
>0V will turn on the transistor and pass -12V.
Derivation of several published circuits:
AN-ECD02 - A Simple Inexpensive Network-Compatible RS-232 Interface:
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See also: www.piclist.com/techref/io/serials.htm?key=rs%2D232
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