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tapping rs485

Discussion in 'Electronic Basics' started by Fritz Oppliger, Jan 14, 2005.

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  1. Greetings
    I am trying to eavesdrop on a RS485 system. Four wire, TX+ TX- RX+ RX- and
    GND.
    I want to hook up my monitoring device to the system such that I can read
    what everyone is saying i.e. receive both TX and RX.
    On an unbalanced system I do it with diodes. On this balanced setup I am
    not sure how to rig it so that the original lines are not affected.
    Thanks for any insights.
     
  2. john jardine

    john jardine Guest

    Use both comparitors in an LM393.
     
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