Calling auto Electricians - Audi Aux In?

[Ray Singh]

I would like a Aux in on my Audi Concert 2 head unit and stummbled across this on the inter web.

http://www.audizine.com/forum/showthread.php/38157... This is for the Symphony 2 - but how hard can it be?

I purchased all the parts as described in the instructions and am now looking at taking on this task.

The Symphony 2 instructions show:



and to connect as below:



Looking at my head unit after removing it is see:



Now i know that I would connect the wires to CD-R and CD-L and probably CD-GND but is this enough?

When I switch on my Concert 2 with the CD button pressed it come back with "No CDC". How does it know that there is no CDC connected? is there other wires I need to connect too?

Thanks

[BentleyTTRS]

If you are still have problems, there is a few guys on the TT forum who would be able to help you out with this.

[silentbrown]

That's for the Symphony 2 *plus*. It won't work on yours.

To get this to work on yours you'd need to add a CD changer (yes, really), and then have an external switch to swap between the cd changer audio, and the aux in.

There are plenty of homebrew projects using a microcontroller to emulate the changer, but realistically that's another whole level of pain.

[shtu]

The Dension Gateway products claim to be able to do that.

[Ray Singh]

It cant be hard. It would just need small voltage on one of the pins to tell the head unit that there is a CD changer connected.....

[silentbrown]

Ray Singh said:

It cant be hard. It would just need small voltage on one of the pins to tell the head unit that there is a CD changer connected.....

Dream on. It's a proprietary bidrectional digital protocol. http://forums.hackaday.com/viewtopic.php?f=3&t...

[Ray Singh]

silentbrown said:

Dream on. It's a proprietary bidrectional digital protocol. http://forums.hackaday.com/viewtopic.php?f=3&t...

Wowzers - CEng with Degree in Radio Frequency electronics and my brain exploded!

My head unit is the Audi Concert 2 - is it as bad on these?

[silentbrown]

Ray Singh said:

My head unit is the Audi Concert 2 - is it as bad on these?

I think it's exactly as bad. Only the Concert 2+ has a simple analog inputs. If you value your time at more than £1 an hour, I'd just get the Dension box, or similar.