M-Bus CD changer adapter for car pc integration - Page 14

jbors · 06-15-2005, 03:55 PM

I'd love to have some news, but not yet. I'm pretty swamped with VW/BMW adapter.

ScrapMaker · 06-15-2005, 04:23 PM

do you think it will cost approximately the same as the alpine cable, or is there something extraordinarly different about the IP-Bus interface?

AdReNaLiN · 06-15-2005, 07:39 PM

Is there something I can do to help with AI-Net?

jbors · 06-15-2005, 09:42 PM

I cannot do it right now even though I have all the info, it just takes time.

Sorry for that.

Default · 06-23-2005, 03:21 PM

Quote: Originally Posted by jbors

M-Bus is on sale now. So it is ready. See the first post. For MBus audio come directly from either 3.5'' jask or 2 RCA into DIN8C just let me know which one you need.
If you can start with AiNet please don't forget about check sum algorithm and its high speed.
As of RS232 I want to see the PC knowing what changer it connected to. This way USB is more flexible.

I don't see any reference of it on your website. Is it still available? Do you have HONDA/ACURA connector "edition"?

PredatorCoder · 06-24-2005, 12:46 AM

I do not have a car computer and all I have is an MP3 player (actually a Pocket PC). I have a 1996 Honda Civic with factory head unit and factory tape deck. After a little googling I have discovered that this uses M-Bus - in fact it is the same except that the plug has two pins switched to encourage users to buy Honda equipment and not Alpine equipment (more $$$ for dealer). It is an 8 pin circular DIN connector, you can see it at http://carstereohelp.net/images/Wire...sHon121001.jpg

As I said I don't have a car computer. So there's no point in using complicated USB chip as mentioned earlier in this thread. All I want to do is have the head unit detect presence of "CD player" (the MP3 player) (and thus start playing audio from it).

Connecting the three audio pins to a 3.5 mm audio connector seems obvious. But I don't know what's required in getting the head unit to start playing audio from these audio pins. Do I have to use a simple resistor or something? Is something more elaborate required?

Basically: how to get auxiliary input into M-Bus input port with as little equipment as possible?

Thanks in advance for any help.

jbors · 06-24-2005, 01:56 AM

You can use "simple" AUX adapter. I'm not aware of any other simple way of getting AUX to work. MBus protocol very demanding to a sequence from CDC.
Hope this helps.

PredatorCoder · 06-24-2005, 12:44 PM

Right, but how might you go about building "simple" AUX adapter? Is it fairly simple (e.g. a resistor, if that) or do you have to do something more complicated?

Also, the head unit is from 1996 Honda Civic. Is there any chance it would use AI-Net instead of M-Bus, or would the unit be too old for this? It's a very simple head unit and all it can do is switch CDs in the CD changer and move between tracks. It tells you basic track information (track count, probably length). It's really simple.