RS-232 levels to computer
- From: pdrunen@xxxxxxx
- Date: 10 Mar 2006 10:29:39 -0800
Hi All,
I understand that standard RS-232 levels must be bipolar with at least
a -3V for a logic "1" and +3 volts for logic "0".
The micocontroller 232 level is TTL level, I use this signal to drive a
NPN so the the signal is inverted and use +12 on the collector to get
the level. The lowest voltage out of the NPN will be near zero. I am
using this for just collecting some data sent over a small cable lengh
and I don't plan on this being part of a design.
The question is in regards to the computer RS-232 input, would the near
zero voltage be taken as by the com port as the correct level?
Tnx de PDRUNEN
.
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