laptop power on ring

**robr** · 04-06-2004, 08:04 PM

my laptop supports powering on a model signal over the serial port. the signal can be either RI (ring indicator i assume) or PME# (i'm not sure what that is). any ideas on how to connect this to power on the laptop when i start the car?

**CdRsKuLL** · 04-07-2004, 01:39 AM

I'm using a laptop, a Dell one. I bought a cheap docking station for it, £20 at a computer market. I have wired two internal relays to it, it now powers on everytime the poewr is connected, and once power has been removed, it goes into hibernation after 10 mins..

the relay diagram I used is

It works great :-) and also means I didnt open the laptop, and dont need to disconnect any wires if I want to bring it inside to work on it.

CdR

**robr** · 04-07-2004, 09:47 PM

alas, i have no room for a docking station (though i think there may be something called a "port bar" available thats much smaller.... i believe they were made at one time, but its an old laptop... NEC Versa LX circa early 2000)

**djmickyg** · 04-12-2004, 03:10 AM

hey theres that circuit i half created

i finaly got my laptop but its very far from going in there car

so that curcuit actualy worked.. and worked well?

how do u mean u didnt have to hard wire it into the laptop? how did u conect it and still be able to remove the laptop for the car?? im interested?

Edit: just re read it and saw u used a docking station.. that makes sence now..