car stereo aux mp3 input

[doggy]

I would like to know how to connect an mp3 player to a cassette car stereo through an aux jack.
Basically how to wire the aux jack to a ford car cassette stereo.

Thanks

 

[keith1200rs]

Usually all you need is a stereo 3.5mm plug to 3.5mm plug cable.

Keith

 

[doggy]

There is no aux jack on the stereo.
I would like to know how to install one.

 

[keith1200rs]

In which case the easiest way is to buy one of those small FM transmitters designed for the job. You plug it in the MP3 player headphones socket & pick it up on the car radio.

Keith

 

[doggy]

Thanks for the information.
I would like to know if it would be possible to wire an aux jack to where the cassette player head is connected on the PCB circuit board pads and connect a toggle switch to the cassette player to turn on the aux jack?

Thanks

 

[keith1200rs]

You can buy dummy cassettes with a cable to do the job.

The problem with trying to wire in to the unit is you need to find a place in the circuit where the signal levels and equalization are correct. The cassette head is not that place. The signal levels are too small. Unless you have a circuit diagram it will be tricky to work out where to cut it in. With an oscilloscope you could trace the audio signal levels and find a suitable place.

Keith

 

[doggy]

A stereo that has mp3 aux input installed ( built in ).
How is this connected?
Wired from the aux input to a pre amp then to the circuit board at the 1st amp stage?
What does the cassette stereo head wire connect to, a pre amp?

Thanks

 

[keith1200rs]

An AUX input will connect quite late into the amplification stages because the signal level is quite high. The cassette head signal is quite low so has more amplification.

Keith

 

[doggy]

I have connected an mp3 aux input to a 8 track head wiring circuit pads and used a toggle switch to power on/off the 8 track player.
Works as planned but I am getting some feedback/noise which I can hear when the mp3 player is turned down.