Salvaged touch pad from old laptop projects
Trackpads generally come in two flavors. PS/2 and USB. A few can come in direct/analog mode, but those are very hard to find.

From the age of it, it's probably PS/2. 5v VCC, Gnd, A Data and a Clock pin. VCC and Ground should be easy to find. The other two are slightly harder. Basically you will have to use a multimeter to narrow it down, then guess.

See http://runawaybrainz.blogspot.com/2013/04/hacks-reuse-laptop-trackpad.html for an example of a old PS/2 Synaptics touchpad being used with an Arduino. Or you could wire to a computer.

Update: This site (Google Translate) has the same thing planned as you. Same board, maybe different minor revision. They have done a pinout of the 1CA017A ic, and wired a ps/2 connector.


(Also, you didn't mention which laptop it came from).