jazzymt

Hrm...if it turns off when the CD player is playing then, no...I dunno what to use. For myself, I'm going to use the high level inputs on an amp to run a sub and it autosenses audio on the high level inputs (but not the low for some reason) negating the need for a ACC signal.

Nope, a GLI is a passive transformer. It doesn't require any power.

Hrm...yea, it sounds like a loose cable...could be either end. If it's the board I'll send you a replacement though. I did have one trouble jack that seemed to crap out, so let me know what you find out. Hopefully just reseating the plugs should do the trick.

The PAC GLI is what I meant to recommend, not specifically the RCA version. That's just the only version I offer. I also listed right below that a link to the two that Crutchfield offers, both PAC GLI's and both work equally well.

Yup: http://www.crutchfield.com/S-8zAv6cz1YfH/cgi-bin/ProdView.asp?search=ground+loop&i=127SNI135

If you're not powering the MP3 player in any way by the car, a GLI is completely unnecessary. I also haven't noticed any problems with heat...there's a lot of open space behind the CD player that might be helping to keep temperatures down whereas most vehicle's stereos are packed into the dash very tightly. I'll let others offer up wishes & wish-nots, but essentially, I'd do the install with an eye on the future. If you think you might add XM at some point, or an MP3 charger, just set it up as best you can for future flexibility.

PAC is the brand name (Pacific Audio Company) - http://www.pac-audio.com/mainsite.asp RCA refers to the connection type on the Ground Loop Interupt (GLI). I think you can see what I mean here, but if not, I can post a larger picture. http://akamaipix.crutchfield.com/products/2004/127/l127SNi1-f_dg.jpeg A ground loop interupt is a noise filter. It isolates audio sources from interference caused by currents traveling on the audio lines by using a passive transformer. PAC uses a 1.3:1 transformer to help improve the signal strength and offset any loss from the passive transformers, something that most companies do not do with their GLI's.

New PCB's should be coming in tomorrow according to UPS. I also looked around for an alternative RCA adapter, but for the price, I just couldn't find anything competitive, so I'll continue with this one for now. My "day job" is gettin pretty damn busy lately and I'll be gone for almost all of next week on business. It will just keep getting busier after that for awhile, but I'll do what I can to keep workin on this stuff.

You should have also received an 1/8" to RCA adapter. It's small and you might have missed it in the packaging...look through your box again. So, your complete install would look like this: Aux-in - 1/8" to RCA cable - GLI - RCA to 1/8" adapter - 1/8" extension cable - 1/8" device This is what you're looking for : http://www.jazzyengineering.com/images/imagecache/ADMP-6.jpg

Someone just bought the last board I had, so I'm officially out. I placed notices on the paypal links and on the website. Orders can still be placed but will not ship until the next batch of PCB's arrive. The PCB's are currently in screening (90% done), and might ship soon, but my gauranteed ship date is not until the end of the month, so I can't say for sure that they'll arrive any sooner than that. Right now, the worst case scenario is I won't have more boards for 2 weeks.

I've thought about it...this thread's kind of a lost cause as it is. I was debating actually starting a forum or a blog on the website...but as usual, time is the enemy. I found a forum OSCommerce supports...I might give that a try if it works well. If a Moderator is willing to help out? It would be nice to split this thread and move all the development posts in the last few pages into a new one rather than having to repost each one. Anyone?

I think I have like...2 boards left. So, I will quickly be out of stock. New PCB's should be here in 2 weeks. Possibly/hopefully sooner, but I doubt it. So, if you want a board this month, better order now...otherwise hang tite for a couple weeks. I'll be pretty busy the next several weeks, but I'll make sure to spend at least a little time each week making forward progress on the no-cd board & post updates so those of you following know I'm not lounging around

I'm trying to find patterns in the actual bits by highlighting similar columns. 1-01-10-00-11 (track 1 to 2) 1-11-00-01-01 1-01-11-00-10 (Track 2 to 3) 1-11-10-01-11-1

Well, yea, then it would make sense to have two different signals, but not four...

As a kit, it's only available on the forum. You can buy all the components on the website though. I should mention I'm out of GLI's, but I have more on the way that should be here Monday. I also removed free shipping, which upped the total price $5. And thanks for the continued feedback everyone. It never gets old hearing about successful installs

Nothing happens...at least, nothing on pin 7. Thanks for the info scoobydrew. I was sure someone had tried this in a SpecB, but I couldn't remember who. Looks like a pretty sweet setup. So, I've been looking at the signals on pin 6 some... Not easy to make heads or tails of, but I've been trying to figure out if there's some kind of marker to indicate the start and end of a data stream. The best I can determine... which admittedly, isn't great... it seems to be 230ms chunks, which at 5ms timing is 46 bits. The start (or end) of each string seems to be marked by 10ms high followed by 20ms low. Just to make things more confusing, when the 10/30 signal is "on" active on pin 7, the divider seems to be 10ms low followed by 20ms high instead. That leaves 200ms for data, or 40 bits... 10 nibbles. I'll collect some data later & see if I can make some sense of that instead...

Well, I updated 8 to 9 data. To give you some idea what I'm lookin at...here are plots of 8 to 9, one with the 10/30 signal before, and one with the 10/30 signal after. (edit) Red is pin 6 BTW, blue is pin 7. http://i27.photobucket.com/albums/c161/JazzyMT/8-to-9-on.gif http://i27.photobucket.com/albums/c161/JazzyMT/8-to-9-off.gif I also recorded a few other functions, but without some better understanding of what's going on, I'm probably going to be quickly overwhelmed with data...I need to figure out why it's using different signals to accomplish the same thing. 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

Mkay...pin 7 is in either of two states at any time. Either it is constant low (no signal), or it's a steady signal, in 5ms timing, it would be 11000000, or 10ms high, & 30ms low. The state changes every time a command is sent (assumed) on this pin. So, one command starts at the end of 30ms low and ends either low, or with a single 1 (the parity bit). The other starts by itself (no other signal running), and ends with the start of the 10/30 signal. I was hoping to see a single command sent on this pin, so I didn't bother trying to figure out two pins at once, but after translating into dec10, I'd tend to agree with you & think it might be sending until it receives a response...I will have to check that later - a logic analyser would help I'll post some image captures of the signal so you can "see" what I'm talking about.. Yes, I monitored the other lines while changing tracks, turning on & off the stereo and while changing from CD to FM&AM. They seem constant. I'm agree, there seems an aweful lot of them though! The different signals have me baffled as well. There's no pauses, the hyphens are simply to make it easier to read...dividing the stream into 4 bit nibbles. I'll play with recording both signals simultaneously tonight & see if there's anything else to help make sense of it.

11-01-11-01-11-01-1 (track 1 to 2) 14-02-14-02-14-02-14-02-1 15-03-15-03-15-03-1 (Track 2 to 3) 11-09-03-09-03-09-03-09 11-01-11-01-11-01-11-01-1 (Track 3 to 4) 14-02-14-02-14-02-1 15-03-15-03-15-03-15-03-1 (track 4 to 5) 11-09-03-09-03-09 11-01-11-01-11-01-11-01-1 (Track 5 to 6) 14-02-14-02-14-02-14-02-1 15-03-15-03-15-03-1 (track 6 to 7) 11-09-03-09-03-09-03-09 11-01-11-01-11-01-11-01-1 (track 7 to 8) 14-02-14-02-14-02-1 15-03-15-03-15-03-15-03-1 (track 8 to 9) 11-09-03-09-03-09 11-01-11-01-11-01-1 (track 9 to 10) 14-02-14-02-14-02-14-02-1 15-03-15-03-15-03-15-03-1 (track 10 to 11) 11-09-03-09-03-09-03-09 11-01-11-01-11-01-11-01-1 (track 11 to 12) 14-02-14-02-14-02-1 15-03-15-03-15-03-15-03-1(Track 12 to 1) 11-09-03-09-03-09-03-09 There, that's in Dec10. I highlighted similar patterns now instead of just identical...looks like more of a pattern now doesn't it? I will have to double check 8 to 9 just to make sure that's a unique signal and not "operator error." ~edit~ I checked 8->9, it was a mistake. I get the same pattern all the way across now.

There's obviously more going on here than a simple "track up" command. I wish it were that simple. I may try a different CD, or try the CD in a different slot (instead of CD1). It may tell us more about what's going on. The other thing I was thinking about was changing the nibble sequences into dec10 to see if that made the pattern more obvious. ~edit~ Actually...now that I look at the columns a little more, it may make the pattern more obvious to compare two bit pairs instead of nibbles.

No harm no foul d.scott. Nice attempt anyway - what works and what doesn't are both useful other people here. Good to see new approaches anyway. My work for the night consisted of attempting to map the command for track up. I got a different command depending on whether the filler signal was running on pin 7 or not (a simple track down, which does not change track, would change it to/from the filler signal to blank). I did however, get a consistent command, one way or the other, for each track change -> Track Up 1011-0001-1011-0001-1011-0001-1 (track 1 to 2) 1110-0010-1110-0010-1110-0010-1110-0010-1 1111-0011-1111-0011-1111-0011-1 (Track 2 to 3) 1011-1001-0011-1001-0011-1001-0011-1001 1110-0010-1110-0010-1110-0010-1 (Track 3 to 4) 1011-0001-1011-0001-1011-0001-1011-0001-1 1111-0011-1111-0011-1111-0011-1111-0011-1 (track 4 to 5) 1011-1001-0011-1001-0011-1001 1011-0001-1011-0001-1011-0001-1011-0001-1 (Track 5 to 6) 1110-0010-1110-0010-1110-0010-1110-0010-1 1111-0011-1111-0011-1111-0011-1 (track 6 to 7) 1011-1001-0011-1001-0011-1001-0011-1001 1011-0001-1011-0001-1011-0001-1011-0001-1 (track 7 to 8) 1110-0010-1110-0010-1110-0010-1 1111-0011-1111-0011-1111-0011-1111-0011-1 (track 8 to 9) 1011-1001-0011-1001-0011-1001 1011-0001-1011-0001-1011-0001-1 (track 9 to 10) 1110-0010-1110-0010-1110-0010-1110-0010-1 1111-0011-1111-0011-1111-0011-1111-0011-1 (track 10 to 11) 1011-1001-0011-1001-0011-1001-0011-1001 1011-0001-1011-0001-1011-0001-1011-0001-1 (track 11 to 12) 1110-0010-1110-0010-1110-0010-1 1011-1001-0011-1001-0011-1001-0011-1001 (Track 12 to 1) 1111-0011-1111-0011-1111-0011-1111-0011-1 The extra 1 at the end seems to be a checksum, there on odd sums and not on even sums. Other than that...there are some common commands (highlighted in corresponding colors), but no clear patters are jumping out at me...then again, it's sorta late & looking at 1's & 0's for so long makes you a bit bonkers. Here's the same sequence, sorted in order of bits (instead of tracks). 1011-0001-1011-0001-1011-0001-1 1011-0001-1011-0001-1011-0001-1 1011-0001-1011-0001-1011-0001-1011-0001-1 1011-0001-1011-0001-1011-0001-1011-0001-1 1011-0001-1011-0001-1011-0001-1011-0001-1 1011-0001-1011-0001-1011-0001-1011-0001-1 1011-1001-0011-1001-0011-1001 1011-1001-0011-1001-0011-1001 1011-1001-0011-1001-0011-1001-0011-1001 1011-1001-0011-1001-0011-1001-0011-1001 1011-1001-0011-1001-0011-1001-0011-1001 1011-1001-0011-1001-0011-1001-0011-1001 1110-0010-1110-0010-1110-0010-1 1110-0010-1110-0010-1110-0010-1 1110-0010-1110-0010-1110-0010-1 1110-0010-1110-0010-1110-0010-1110-0010-1 1110-0010-1110-0010-1110-0010-1110-0010-1 1110-0010-1110-0010-1110-0010-1110-0010-1 1111-0011-1111-0011-1111-0011-1 1111-0011-1111-0011-1111-0011-1 1111-0011-1111-0011-1111-0011-1111-0011-1 1111-0011-1111-0011-1111-0011-1111-0011-1 1111-0011-1111-0011-1111-0011-1111-0011-1 1111-0011-1111-0011-1111-0011-1111-0011-1 Ideas? I'll post track down's tomorrow.

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. 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 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. 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. 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.

I have to revise my assessment of the pinouts. I've done a little more careful investigation and it is not as it first appeared: 5] Clock Signal (200Hz) 6] Digital Comm I/O (3.5V Logic) - (From CD Changer? CD/Track/Time info?) 7] Digital Comm I/O (3.0V Logic) - (From Radio? Commands to CD changer?) I think pin 7 is a command pin because of the 25Hz pulse (3.0V, 10ms/30ms) which I saw before on odd tracks, high/unstable on even tracks and when off. The signal is not on just during odd tracks, its on until you send a command to the CD changer (ie. track change), which you can see as an interuption of this signal and then it switches to off... when you send another command, you see the command, and then it goes back to the 25Hz signal. I'm sure it would help if I had a bit fancier scope than my $150 USB setup Still, I'm making progress. I've also found a few other sites that have done work on Matsushita radios, mostly for Mazdas. I'm not sure yet if they will be any help. I may invest in a USB Logic Analyzer to get me a bit further....

Well, I did some research today. I took apart the radio to gain access to the CD changer lines, soldered leads onto it and powered it up with a 12V power supply. http://i27.photobucket.com/albums/c161/JazzyMT/pins_soldered.jpg http://i27.photobucket.com/albums/c161/JazzyMT/Radio_hookup.jpg I hooked it up to the scope and identified the pinouts: 1] Audio + 2] Audio Ground 3] Audio + 4] Mute (3.5V Logic) 5] ? (3.15V, signal?) 6] Digital Comm I/O (3.5V Logic), plenty of activity even with the CD off 7] 25Hz pulse (3.0V, 10ms/30ms) on odd tracks, high/unstable on even tracks and when off? wtf? 8] 3.0V Constant 9] 3.3V Constant 10] 3.5V Constant 11] 5.0V Constant 12] Ground? 13] Ground? 14] 8.6V Constant? Pins 5 & 7 have me baffled at the moment. 5 is unstable at 3.15V, and occasionally "spikes" down to zero somewhat randomly. I was sure 7 was a clock signal until the track changed...then I was confused again. From what I can find on Panasonic/Mitsushita, they use a serial communications protocol, which will help. I ordered a USB to Serial adapter for my laptop so I can program & debug my PLC...when dell replaced my lappy, they gave me one without a serial port. In the mean time, I'll keep poking around the internet for info. Any EE's have any idea what 5 & 7 could be?

1) I didn't even notice the patch cables are directionally labeled, but yea, it's a bunch of hype. Don't worry about it. 2) Ack! Really? It fits nice and snug on the one I tried, but I only tried one...I'll test the rest of them. Perhaps you just got a bad adapter. Or, do you mean it is so tight it won't go on? Do you have a stereo or TV you can test the leads on the GLI out on to see if that's the cause?