arches
Posts: 3
Joined: Wed Jun 13, 2012 7:54 pm

Use an old Laptop Touchpad?

Thu Jun 21, 2012 5:03 pm

I was thinking about using the Touchpad from my old Laptop as a pointing device, since it was recognized as a PS2 device without drivers. Left clicking would work, and a right click can be performed by pressing "CTRL-Left Click" if I'm correct.

After some researched I leaned that it's possible to use an old Laptop Touchpad and convert it to an PS2 Device, by using an old PS2 cable from an Keyboard or Mouse and smoldering the wires from the cable to the Touchpad.

The problem is, all I could find is that it is possible. The Guides on how to do it didn't help much, since I couldn't see very much. I also found a thread about someone successfully doing what I try to do, but he didn't post how to do it, just that he managed to get it working :(

http://translate.google.de/translate?hl ... 32852.html

It would be awesome if anyone could help me with my Touchpad. I'm still learning, so I thought this could help me. Here are some Photos of my Touchpad:
Front: http://filebeam.com/6baa2211a97ced15e28 ... 0a3053.jpg
Back: http://filebeam.com/017e30d551261525b9a ... c6e67c.jpg
Connector: http://filebeam.com/b335770b55b2616dad4 ... 3ce172.jpg
(I still possess the Cable which was used to connect the Touchpad with the Laptop Mainboard, if thats needed)

Thank you for checking my post, and thanks in advance :)

JP_Godfrey
Posts: 8
Joined: Mon Jun 11, 2012 10:01 pm

Re: Use an old Laptop Touchpad?

Fri Jun 22, 2012 7:01 pm

I would think it would be as simple as cutting the trackpad cable and the other PS/2 cable and soldering them together. However there doesn't appear to be a standard colour scheme for PS/2 wiring so you may need a Ohm-meter or Multimeter to check which wire is which before you go cutting anything.

arches
Posts: 3
Joined: Wed Jun 13, 2012 7:54 pm

Re: Use an old Laptop Touchpad?

Fri Jun 22, 2012 10:20 pm

At first, thanks for your answer :) I already know the wires from the PS2 cable I was going to use, the problem I have is how to connect them to the touchpad.
Should I solder it directly onto the Touchpad, or to the Cable which connected the touchpad with the Laptop Mainboard? The Cable looks like this:

http://filebeam.com/8e9d8e4468dc55d0cf0 ... e94147.jpg

How do I know which wire to use from the Touchpad Cable, and wouldn't it be better to solder the PS2 Cable wires directly to the Touchpad? I've seen Pictures where the Touchpad cable was used, but those were to blurry to recognize important information :(. Can I find out which wires I should use by simply following the paths from the Touchpad chip to the connector?

trikidiki
Posts: 12
Joined: Thu Mar 15, 2012 9:00 pm

Re: Use an old Laptop Touchpad?

Sat Jun 23, 2012 7:54 pm

If you do a search for Touchpad PS2 or Synaptics PS2 on google there are loads of articles that explain how to do it with Synaptics Touchpads, I think Synaptics make most of the touchpads around. There are also datasheets around for some of the Synaptics pads.

arches
Posts: 3
Joined: Wed Jun 13, 2012 7:54 pm

Re: Use an old Laptop Touchpad?

Sun Jun 24, 2012 12:12 pm

Ok, I will do that. Thanks for your help :)

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