Interfacing with a PS/2 mouse with Arduino to get x and y coordinates

Hello Everyone,

I am currently working on a project where I need to be able to use an Optical Mouse to determine the location of my robot. To do this I am using an Arduino Uno, and a PS/2 mouse from Logitech. I began this project based on the following Instructables post: Optical Mouse Odometer

However, after following the instructions I receive no feedback from the mouse. All that is presented in the...

Interfacing with a PS/2 mouse with Arduino to get x and y coordinates