Posting the circuit diagrams of two types of head units - Clarion and Pioneer (latter used in soft-dash Classics, and a version of it - in Disco 1), as well as a couple of other connection diagrams.
I've been using transformer coupling on most aftermarket/factory or ham radio/factory amp combos. Practically, without a transformer the noise/whine is guaranteed on a Classic with rear-mounted amplifier.transformer coupling was the easiest I found. I believe you recommended the exact model I ended up using in a post a long time ago.
I have one of the boxes you made to hook a audio Jack input into what used to bring in the cd input.I only shared the shit code when I was clinging on to the proof of concept build way too long. If someone can trace through that and figure out what I was thinking 8 years ago, good on them. Still, it should compile just fine in arduino IDE for an uno or mini. Uno built in voltage regulator is more robust. A D1 alternator will kill the on board caps of a mini in no time.
Here's a more homebrew friendly connector shell. It uses the crimp pins that a DB9 or DB25 male shell would use. 3D prints fine on ABS. I stopped using them when I went to printed circuit boards. Crimping db pins sucks.
There will be a serious ground loop if you charge whatever you are using at the same time as playing it. transformer coupling was the easiest I found. I believe you recommended the exact model I ended up using in a post a long time ago. Triad Sp-67. They are red, and expensive. Bass roll off is only noticeable if you really pay attention.
I could use one, too.I have one of the boxes you made to hook a audio Jack input into what used to bring in the cd input.
My workbench is full of unfinished electronics projectsYou could brew one up with the above files
I've had my eye on this for a while but am trying to find a deal. Recently I looked on Crutchfield and they show it as discontinued so maybe I'll have to just bite the bullet and grab one soon.On a similar note, I installed a Blaupunkt SQR46 in one of my classics and it's pretty sweet. It looks old, almost factory, but has BT streaming.
That's a bummer if they really are discontinued. It's a pretty cool retro unit. Looks like they're still available from a couple places.I've had my eye on this for a while but am trying to find a deal. Recently I looked on Crutchfield and they show it as discontinued so maybe I'll have to just bite the bullet and grab one soon.
When/if my CD player dies I will need to figure this out. For now I simply intercept the audio lines from the CD player to the head unit and fool the head unit into believing a CD is playing.You could brew one up with the above files
There's a bit of art in it.fool the head unit into believing a CD is playing.
I used multiple sized drill bits to remove the chip. Once I got the 4 connectors on one side loose i just moved the chip back and forth until it broke free. I reassembled the tape machine and it worked as promised after hitting the arrow button 5 times. Easy enough and I would do it again without hesitation.You could also rip this IC off the board and the code becomes any button that isn't a number pressed 5 times. For example, you could press the next track button 5 times and it would be happy. If you press '1' 5 times it will beep like a bad code was entered.