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 Robotics / 22711
  RE: interfacing PCs with LEGO?
 
Joe (...) Yes. It's the same as RS232 except that the voltage is inverted (and swings between 0V and 5V instead of +/- 9V). To connect it to a PC serial port, you need to invert it with one transistor for transmit and another for receive. I've (...) (20 years ago, 24-Aug-04, to lugnet.robotics)

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