Tuning CD changer emulator

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Tuning CD changer emulator

vgeorgiev

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Aug 23, 2013
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Hi guys,

If you have stock Grundig radio with CDC support you can try the device below.
It emulates a cd changer. You can listen to a mp3 with high quality.

Check out this video ->

Source code and schematics are free. Download here.

I use MP3 module w/o display.






 
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Eagle... be free and use eeschema from kicad :p

So are you publishing the source (grundig proto mainly) or should I decompile the AVR hex? (elf would have been nicer)

Considered doing it myself as I got spare grundig radio that came with the CD changer I installed on Marea (but good old music comes on CDs so havent had a need).

Also links are kinda up the rear.
 
Hi guys,

If you have stock Grundig radio with CDC support you can try the device below.
It emulates a cd changer. You can listen to a mp3 with high quality.

Check out this video ->




Source code and schematics are free. Download here.

I use MP3 module w/o display.
 

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Links seems dead. Please, find package attached.
 

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Actually sniffed the bus today, 1200 baud serial seems to give proper data. Just rx/tx crammed into same line with some address comm protocol.
Cheating it to think there is changer connected and looking for the next/prev etc command might be possible with some time sacrificed, actually sending proper track time data looks like too much of a bother.

I think I might just use the AUX method and just wire the steeringwheel remote to the unit separately. Much less time consuming.
 
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