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Mouse Cam

Step 8Connect the cable

Connect the cable
I used a piece of flatcable from a hard drive cable to connect the mouse board to the printer connector. The numbers in the figure below refer to the pin numbers of the optical sensor chip.

It is best to identify those wires using a multimeter, or some sort of continuity tester which will not damage the sensor chip.

Pin 3 of the sensor is the data in/out pin. It goes to the connector pin 12 directly, and to pin 5 via the diode.

Pin 4 of the sensor is the clock input. It goes directly to pin 9 of the connector.

Pin 6 of the sensor is ground. It connects to the large area of copper on the board, and to pin 25 of the connector.

Pin 7 of the sensor is the supply pin. It has to be supplied with +5 volts for the sensor to work. In the figure, this is the yellow wire, running back to a hard drive connector. If you have the original cable of the mouse, whether USB or PS/2, the five volt line will be present at the end. Just identify that and connect to it.
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Author:neelandan
Employed as an Engineer in Electronics. Interested in building small circuits around tiny chips (the electronic kind).