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Aux in on Concert radio for PDA/MP3 player

Discussion in 'In-Car Entertainment' started by synthdood, Apr 26, 2005.

  1. synthdood
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    synthdood Member

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    [Apr 26, 2005]
    I have just discovered that my new PDA (Fujitsu Siemens PocketLoox 720) has a line out on the cradle plug. This is opening up some great possibilities to use it as an in-car MP3 player as well as for SatNav /ubbthreads/images/graemlins/laugh.gif.

    I'm now looking into getting an active Brodit cradle for the PDA and modify the plug/cable myself so that it also carries the audio signal. The only problem is getting the signal into the Audi radio. I know that the CD changer inputs can be used for this and I'm sure that finding the line-in pins on the radio is simple enough, but what do I need to do to fool the Concert radio/cd into thinking there is a CD changer installed? The usual boxes that you can buy to create a aux input on Audi radios are too expensive to my taste. I'm quite good with electronics, so unless it is going to require programmable microcontrollers, I'm sure I can make something myself. All I need to know is which pin requires what kind of signal so that the radio thinks a CD changer is connected.
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  3. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Apr 26, 2005]
    It needs dummy data on the Data In line on the back of the HU, the pin outs are detailed on the top of the HU
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  4. imported_G4JSG
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    imported_G4JSG Guest

    [Nov 1, 2005]
    [ QUOTE ]
    It needs dummy data on the Data In line on the back of the HU, the pin outs are detailed on the top of the HU

    [/ QUOTE ]

    Could you please explain what to do as I am looking for this very same solution. My concert radio/CD also has the glove box 6 disk changer which I will be removing if I can get the MP3 player connection working, so I could use the wiring harness for the solution I gues????

    Any help will be really appreciated.

    Thanks
    John
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  5. technics100
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    technics100 Member

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    [Nov 11, 2005]
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