headphone jacks

how to connect the audio from PC to the Circuit board using the headphone jack and also connection details of the pins.
even i need help for the Dc jack.
regards

use stereo jack pin

thanks ajay,
actually i wanted to know about the female connector used in PC for connecting the speaker. i hope u got it. i wanted to know the pin connections of the jacks.

i shall show u the circuit for the audio coupling of the PC to telephone line. also please suggest me the audio transformer ratings and size, actually im using the eagle layout editor software and wanted to know which audio transformer i must connect from the available library.
regards

you can use 6v audio driver transformer

Do both transformers connect to the (soundcard's) lineout,or one to lineout and the other to linein(for recording)?
The female connector in the soundcard is a simple stereo socket with 3 terminals for left ch,right ch and ground.The corresponding male stereo jack pin and it's connections have been posted by TPS.Instead of the RCA jacks you may use mono headphone jacks and corresponding female(mono) sockets as shown in your ckt.
As for the isolation transformer you may use a 600:600 ohm one.Look in telephone repair shops....
The eagle library doesn't seem to have a specific part matching your transformer.You may use the one given in 'Speial Devices' category.

thanks for the valuable reply. now please help me in this doubt.....
the headphone jack which i bought has got 4 pins for connection, now what connection should i make in order to couple the audio from PC to the telephone.

Hi to everyone,
I have got the audio isolation transormer which has got 4 terminals at one end and 3 terminals at the other end. Can anyone tell me connection diagram for this transformer to interface with the telephone line and PC.


Regards
Sanath
Bangalore

hope u have been to this site
http://www.indiahams.com/downloads/dvu2ckt.pdf

hope it helps

Hi to everyone,
I have got the audio isolation transormer which has got 4 terminals at one end and 3 terminals at the other end. Can anyone tell me connection diagram for this transformer to interface with the telephone line and PC.


Regards
Sanath
Bangalore

SANATH MCX

Do a continuity check ad determine which terminals are connected.

I have done the continuity check , Can you tell me how this will help me in finding the terminals of Audio Isolation transformer.

Regards
Sanath
Bangalore