Easy to use Arduino library for connecting PS/2 or PS/2 compatible USB mice to AVR based Arduino boards.
Connect the mouse to the Arduino as shown in the pictures below. With the 10k resistor between Vcc and Data, it is possible to upload the sketch with the mouse connected.
Connection of mouse with PS/2 connector
Connection of mouse with USB connector
Copy ps2mouse.cpp and ps2mouse.h to your project directory. Include ps2mouse.h.
The script must call mouse_init() in its setup() function and mouse_update() in the loop() function. The on_mouse() callback is called when the mouse has moved or a button was pressed.
There are also two optional callback functions on_mouse_ready() and on_mouse_disconnected() that are called when the mouse is plugged in and ready to use or plugged out.
Try the Example circuit and Arduino sketch.
Example on breadboard
Circuit diagram of Example