LIRC: signaux DCD, RTS, GND

GND o--------------------------------+------+
                                     |      |    +-------------------------+
                              C    -----    |    |      SIEMENS 444        |
        1N4148    R1 (5K)   (22uF) -----    +----+ -    SFH 506-36         |
      |\ |         _____          +  |           |                         |
RTS o-| >|---+----|_____|---+--------+-----------+ +    ##############     |
      |/ |   |              |                    |      ##############     |
            | |             |                    |                         |
            | | R2 (10K)    |               +----+ <- signal               |
             |              |               |    |                         |
DCDo+--------+------------------------------+    +-------------------------+
    |                       |
    |                       |
    |             +---------+
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    |            _|_
    |            \ /
    |            _v_ LED
    |             |
    |             |E
    |          B|/
    --/\/\/\/---|    BC 556 ou 2N2907
        4,7K    |\
                  |C
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