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Utilizing Old Mouse

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mahesh_jo

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I have an old Logitech 3 button mouse in working condition. Now I want to dismentle it and utilize some parts of it. Is any body has any idea about utilizing old mouse parts, circuits and encoders.

-Mahesh Joshi
Bhopal, India.
 

Exo

Active Member
There isn't much interesting inside an old ball mouse. The only interesting thing would be the IR transmitters - receivers that are used to count the gaps in the movement wheels. The rest is normally all done by a µController (wich probabely cannot be reprogrammed, they use OTP to keep it cheap)
 

mahesh_jo

New Member
Thanks. Can we use these IR Transmitter-Receiver to display a counter, how many times the wheel is spinning? I want a digital display.

-Mahesh Joshi
 

Exo

Active Member
So, You want a display thet counts when you move the mouse? That's easy to do .... with a pic
 

samcheetah

New Member
hey guys i thought of this too.

i was wondering if i could use the circuitry already in the mouse and use it as a counter. for that i need to know about the power and data wires. does somebody know about the wires in a PS/2 mouse. what are the color codes. i know it would be better if i made a counter myself. but why not use the uP in the mouse.
 

Exo

Active Member
http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/PS2/ps2.htm
explains the connections for any PS/2 device, including power and ground.

Making a counter by using the µC already in the mouse would be a big way around. The µC doesn't send pulses or something back to the pc, but formatted data packets using the PS/2 protocol (also explained on the above site). So you would need some kind of second µC to decode the PS/2 information sent by the µC in the mouse. It would be far less work to just remove the original µC and replace it with a pic and do the counting directly.

Unless, of course, you can reprogram the µC of the mouse, but like i said before, they mostly use OTP devices.
 

samcheetah

New Member
thanx Exo

i understand that using the uC of the mouse is a tough bussiness. and making a counter is very simple. and if i would be designing a system i would have made my own. but that was just a thought that came to me. thanx for the reply and the link. i needed that knowledge about PS/2 devices
 

bogdanfirst

New Member
what about using the mouse with a robot to determine its position?
or mesure the distance from something to something by mooving the mouse.
 
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