/diy/ - Do It Yourself

[Anonymous No.471992]

Good day good sirs.
After a bit of googling i'm still out of luck.

I want to turn this original car stereo into something that I can connect an aux-plug into, or hack together with the output of a pair bluetooth headphones in some way. Is this feasible?

[Anonymous No.471993]

>>471992
you need a factory to aux cable

[Anonymous No.471995]

Gute Idee, interessiert mich ebenfalls. Nur so aus Neugierde heraus.

[Anonymous No.471996]

>>471993
it's not supported.

[Anonymous No.471998]

i myself am thinking somewhere along the lines of removing cd player to access a feed from there to send audio or something along those line. I just dont know if its feasible without extra stuff(i.e. ic's or some filter stuff)

[Anonymous No.472005]

A picture of the insides with cd player removed. Any ideas?

[Anonymous No.472007]

>>472005
Much nicer picture than your typical cellphone camera shots at night for most of the crap pictures posted here. I would not spend time looking at those if the poster would not spend time on taking a better picture that is required to do analysis.

Since it is a stereo, I would start looking at parts of the layout that have a symmetry - they need two identical circuit for each channel. That's a good clue for the signal path.

google up the datasheets or from .datasheetarchive.
You can use a old headphone with a few hundred ohms resistor in series to protect the circuit/your hearing and trace the signal.

2 places I would look at:
- The MC14066 is an analog MUX, so it might be where the audio signal gets selected.
- IC200 looks like an audio opamp of some kind, so that's where I would look at.

All of that assuming you know enough about audio circuits as there are no nice easy to use internal connectors that does what you want.

[Anonymous No.472015]

>>472007

I'm more inclined to assume that IC300 with all those capacitors is the main audio processor chip, doing the multiplexing as well.
The actual power amplifier seems to be in the upper right corner. If an ugly kludge with a manual switch is ok, OP could route his shit directly to it.

[Anonymous No.472016]

>>471992
>>I want to turn this original car stereo into something that I can connect an aux-plug into
For that you just need an RF modulator. You give it a 12V power (ingition-ON type) then plug it inline with the car antenna connection on the back of your head unit.

[Anonymous No.472026]

>>472007
Thanks for your reply kind sir. The photo was actually taken with my htc titan crap phone.

After some more googling and a venture in to uncharted russian language territory i seem to have found a way to sacrifice the AM reciever for an aux cable. (no AM transmissions in my country anyway).

Actually got an old crt based oscilloscope in house, though i hardly know how it works..
Know little to nothing about circuits in general let alone audio, and how to actually modify them. Was hoping for some easy cut the lead there, solder wire there, there and there and presto... Luckily it seems like i found it.

this is the site if anyone have any interest:

carpc-project . ru/AUX-MITSUBISHI-W142.html

[Anonymous No.472027]

>>471992
Try to get a schematic from the manufacturer

[Anonymous No.472030]

>>472027
No apparent need, im going for
>>472026

[Anonymous No.472031]

>>472016
There is no fun in that.

[Anonymous No.472567]

Op here.
if any interests.

I did as i found in the russian link. ( >>472026 ) + i hacked an old creative wp350 bluetooth headphones to have 3,5mm jack output instead of those darn speakers. So suddenly i have handsfree + my music starts playing from my cell the minute it connects to the bluetooth device.

All in all im satisfied with myself and that lovely russian that put up the step by step. It works somewhat fine, allthough a bit sensitive to phone usage. Anyone know of any easy fix for that?

Forgot to make an "after" shot with the stuff installed.. But im kinda glad about that as the soldering was as ugly as any i've seen. Didnt bother insulating with shrink tubing as the russian did, but used plenty of hot glue.

[neckbeard_the_pirate No.472600]

>>471992
Personally I'd break the L/R lines going directly to the amp chip. Use a female stereo plug that also switches. When you plug a cable in, the plug disconnects the amp from the rest of the circuit.

[Anonymous No.472606]

>>472567
Good man! Time to tackle my own!