* it writes the results to a serial display. * one side of the button is connected to pin 7 other to ground. * a button on pin 7 is used to zero the reading. * it measures the distance the mouse travels.

* an arduino sketch to interface with a mouse ( optical, ball, ps2 and some usb). #include // Comes with Arduino IDE #include #include /* * this is a modification to the original ps2 mouse sketch, it requires ps2 library, * can be found on arduino website. Mount the mouse printed circuit board, use a tweezer to adjust the location of the IR emitter and receiver so the encoder wheel is in the middle and cover at leat 1/2 of the receiver.Insert the mouse encoder wheel to the other end of the idler wheel, again make sure the encoder wheel is perpendicular with minimum wobbling.Use epoxy if needed, make sure the bearing and the idler wheel assembly is perpendicular to the sensor body. Insert the printed idler wheel into the 625zz bearing, apply small amount of the Teflon spray lubricant then insert the bearing into the printed sensor body.Once dry, the rosin residual will help to increase the surface friction. Coat the idler wheel with the liquid lux. Use a 2mm drill to clear out the mounting hole. Cut the encoder to half near the small rims in the middle.The mouse has two encoder wheels for X and Y axis respectively, we only use one of the wheel on the X-axis. Take the mouse apart, what we need is the circuit board and one of the encoder wheels.

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