LastResort

CD off (to FM):

1111-0110-1111-0110-1111-0110-1111-0110-1

1011-0001-1011-0001-1011-0001-1011-0001-1

1011-1101-1011-1101-1011-1101-1

 

CD on (from FM):

1011-1011-1011-1011-1011-1011-1011-1011-1

1111-0110-1111-0110-1111-0110-1

1110-0010-1110-0010-1110-0010-1110-0010-1

 

CD on (from AM):

1011-0011-0011-0011-0011-0011-0011-0011

1011-1111-0011-1111-0011-1111-0011-1111

 

What happens when CD is pressed twice? I was thinking about that as I drove home and cycled through FM1 and FM2. Seems like they might do the same for CD1-6 in the Dash and CD's 1-6 in a changer somewhere.

Welcome LastResort. You can certainly wait, but it might be awhile - like, maybe forever. I've entered the domain of "over-my-head" and may not return. Also, there's a chance the protocol the WRX radio uses is not the same as the Legacy, so even if I do figure it out, it might not be compatible.

 

In that case, I will probably get a MP3 player and that card in next couple of months. I think eventually I've got my eyes set on the new Alpine Double Din touch screen unit coming out. But that will be a ways a way, if my wallet has anything to say about it. I read somewhere that the additional connector might be C-bus / Can-bus, but I can't find that webpage again. I hope that both the legacy and WRX could benefit from the same parts.

 

Tapping the audio signals before the amp would probably require soldering, and you'd loose all volume control (ie, you'd need separate volume control for the amps).

 

I'm not thrilled about soldering the traces, but I think I can pull it off if I'm really careful. I've done it before to fix some broken traces in an amp that was abused more often than used. Are you sure that the volume control is in the power amplification stage? I was hoping that the pre mps provided all the tone controls and volume, allowing me to tap and buffer those signals. I'm not going to do that if I have to run a separate volume knob.

 

I should also mention I ordered another batch of PCB's. I've got about 20 or so of the last ones still around, but they're running out rather quickly, so I'll probably run out soon and won't have more for a few weeks.

 

Cool, I'll finish up the tax return and get myself an MP3/OGG player then.

 

I really think I either need a new scope or a LA to be sure what's going on with pin 5. The 200kHz 8bit limitations of my current scope are becoming painfully obvious. Still...good DSO's & LA's are pretty dern spendy. I suppose I should make due with what I've got for as long as I can.

 

Have you thought about rigging up an 8 bit shift register and clock divider to buffer the higher speed signal and use all eight of your input channels to read that single channel?

 

For better or worse, this headunit is also a lot smarter than I am. It's already saved my butt a couple times by self-diagnosis & shutdown. It has thermal overload that kicked in when I left it running a few too many minutes w/o the heatsink (even at 0 volume & no load). I've also crossed pins a couple times accidentally & seen weird things on display, or caused the disk to eject...luckily, I haven't fried it yet and can continue, but I wouldn't be suprised if this project ends with a puff of smoke...and putting the smoke back in definitely takes more skill than I have.

 

Well, I'll let you wander into that territory by your self, as I've seen more than enough magic smoke escape out of 100A IGBT's in my life. those things don't just fizzle, or even pop, it's like shotgun.

I'm not a Legacy owner, however I've got an 05WRX and through a number of links found this discussion on jazzy's Aux-In mod. I will purchase one of these, and I was hoping for one that does not require the blank CD hack. 250, is a bit steep, but I love the look of the color matched system and can't deny the elegance. So I will wait (somewhat) patiently. Besides, my wife has threatened to kill me if I try to remove the OEM deck . Eventually, I would also like to tap the board just before integrated amplifier so that I can run a couple of external amplifiers.