As I wasn't planning on running the screen wirelessly, having a corded mouse were definite a plus. This meant that could add couple of extra wires running parallel to ones that the mouse needs for regular operation. USB cord usually has five wires running between the device and the computer. Two wires for power, two wires for data and one that connects the shielding of these two devices together. Driver board that I'm using in this mod requires three extra wires to be added for data communications.
Wiring diagram and the program is now available via MetkuMods forum.
Making the cord
|1.)||Original USB cord from the G5 mouse. Only thing to do here is to remove the black nylon cord that keeps the wires together.|
|2.)||This is the end where the USB connetors once were. Cut that away and pull off the black nylon wire wrapping. Added the three extra wires and new blue braided sleeving.|
|3.)||Same connector as seen in the 1.). Three extra wires visible that will route the data from the computer's parallel port to the LCD screen inside the mouse.|
Parallel port connector
From here we can see the connections that are made inside the parallel port connector. The original USB connector is reattached to the cable. From the ground wire of the USB cord I added a wire to parallel port's ground pin. Any pin from 18-25 will do just fine. This ensures that the voltage levels both in the USB and parallel port are equal thus making the signaling more stable. Data pins 2,3 and 4 are used to talk to the LCD screen.
And now we have a working LCD screen to place inside the mouse. Power is taken from the header that receives the USB cord coming from the computer. Now begins the most demanding task; Putting everything together.
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