How to find pinout for Touchpad/Pointing Stick & connect to Arduino - Synaptics

It is very easy to identify right pins for connecting any TouchPad or pointing stick using PS/2 protocol. I will show how to identify most important pins (Ground/GND, VCC/5V, Clock/CLK and Data) on any TouchPad or pointing stick and how to connect them to Arduino. The device used in the video is some Synaptics TouchStyk Pointing Stick (PointStyk) that I extracted from broken laptop/notebook keyboard. Of course I could not find the pinout so I had to figure the pins out myself. This how-to can also be used to find the pinout for other brands such as IBM TrackPoint. PS/2 mouse code used in this tutorial: https://playground.arduino.cc/Compone...