Thread: Advanced Circiutry Help - Laptop Line-in

I am building a CarPC out of an old Toshiba Satellite 1110

here is a picture of it dissasembled:
[media]http://dimension6.googlepages.com/1115-10.jpg/1115-10-full.jpg[/media]

Now I have some very very basic wiring and circuit experience. I will be building one of webmasters auto-turn on modules.

Now this laptop has a Realtek ALC202 chip with the widespread AC97 Avance Sound driver that i would bet half the laptops have or any other integrated onboard soundcard previous to 2004


now the laptop has built in it

Line out going to to amplified speakers.
HeadPhone out /w sense
and MIC in


but going into the mixer in windows, I can control these and more
AUX IN
LINE IN
PHONE
TV/VIDEO IN
CD IN

so I did some digging and found this:
ftp://66.104.77.130/pc/audio/alc202a_data.exe

Don't be fooled by the exe extension, its a self extracting zip
here is the linking url

http://www.realtek.com.tw/downloads/...Downloads=true


Now according to these data sheets I can give my laptop 4 line in's that can be controlled by the windows mixer, roadrunner, and ultimately, one knob on my head unit. which would be really nice.

for me and probably others this would be a much better option than buying a USB Soundcard, eating up CPU, and then having to by an input selector, USB or not.

it also means that my HD Radio, SIRIUS, external CD and IPOD/AUX, can all have there own dedicated mixers. "simply" by soldering to the pins on the chip

the only thing is that the analog input signal has to be "1 VRMS", and I honestly have no idea how to achieve this. I can built a simple pcb according to spec and solder it to the mainboard.

But trying to learn how to build what I would hope to be a simple, unsophisticated circuit, has gone right over my head. I can't make heads or tails of the information I've read.

So if anyone can help, or give some suggestions, it would be much appreciated. I'm sure others would love this mod to.