wow, thanks for all the replys,
i'll answer on each one
1. hock - the sound output will be the speaker output just as it is, yes i understand what you mean by chetter but all i need is 1 click and the computer will turn on. if it will continu to chatter , thats ok.
i don't know what a flipflop is, i mean i know its a chip, but how to use it in my diagram?
2. cameo_2007 - low battery warning will not occure as this will be plugged into the charger constantly. because this cellphone will always be near the computer as it will be connected to it.
3. GrandAlf - yes i've googled that a bit, and also light sensor - because the backlight will turn on when there will be an iincomming call.
but as i mentioned... i'm not too familure with components beyond resistor / capacitor , AC DC , relays , soldering, multimeter, basic things.
yes i am eager to learn , i'll be happy for more in-depth guidence.
4. sarath.electro - i have no idea what your talking about... but i'll google it !
5-himrwt - yes, i've seen that option on google, it seems that it should give out 1.3 VDC, yes much more then the speaker voltage but the cellphone i dedicated for this job does not have a vibrator, its an older model. but if and when i'll get this thing to work... i'll let you know
any more suggestions?