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Logitech Mouse Hack - WHY don't they work?
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Grauwulf:
Thanks for figuring this out Stormy! I had an HP USB mouse here that I knew was a Logitech inside that I just wired to my Imperial 3" trackball and it works flawlessly.
mh12:

--- Quote from: Stormy151 on October 08, 2004, 02:56:15 am ---The IR detectors had 4 leads on them instead of the "usual" 3.  I managed to find a pinout for these on the website of the Seattle Robotics Society.  The topic was for extracting encoders from mice for use in home made robots.  The link is since dead, but I have scanned the diagram (I printed it out so I could use it on the workbench) I am hosting it here: http://members.cox.net/pbeals9/pics/encoder_pinout.jpg

--- End quote ---

Does anyone still have this diagram? I can't find it anywhere. Nor can I find any tutorial dealing with 4-lead mice. I'm trying to hack a Logitech that sounds like this.. the number on it is 201106-0000.
huygens:
Some mice (most logitechs as I understand it) drive the led with a high frequency pulsed signal rather than 5v DC. When you feed the mouse with the quadrature signal from your trackball / spinner it doesn't work as the signal is missing the high frequncy pulses the mouse expects.

Edit: Sorry, didn't notice how old the original thread was
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