joey7415963

Hi all, been a long time since I've visited these forums.

I finally decided to get this laptop into my car, and bought an official compaq car DC-DC adaptor. However, it is the wrong connection for my laptop, so i decided to see if I could merge the existing power supply adaptor to the new in car power supply.

I hacked apart the cables and found that my laptop runs off three wires, one at 18.5V the other at 14V and the other a ground, whereas the new supply has simply 18.5V and ground (both are rated at 65W/3.5A).

I am thinking of making a voltage divider (two resistors in series). Firstly I want to know if anyone knows the what the current will be at both pins (my fuse has blown on my multimeter), and secondly how I would control the current through the voltage divider, or will it just draw the current it needs?

My electronics is mega rusty so any help would be greatly appriciated.

Regards

MP3Car.com

 

FusionFanatic

have you tried to just connecting the 18.5v and ground wires and leaving the other wire disconnected?

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joey7415963

Yeh thanks I tried that with the original power supply but it does need it.

I should have updated this sooner, I bought an inverter instead, seemed the simplest way to do it besides it was only £20 from maplin.

Next problem im facing is trying to get an aux input on my blaupunkt headunit, I don't want to take it out but all the methods I have tried have failed

Thanks for the reply though!

MP3Car.com