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Mouse Hack to Happ Trackball
Minwah:
OK I'm trying to hack a fairly old Logitech 3-button mouse to a Happ trackball.
I have read everything I can find to do with this, and although I haven't done everything exactly as others have, I thought I had a reasonable understanding.
My problem is:
I have power to the trackball no problem. I wired 2 of the 3 pins (for the mouse receiver part) to the 2 wires from the trackball which are not power. I THOUGHT the 3rd pin on the receiver was for power (when used in the mouse), therefore have not wired this to anything. I did this for each axis.
Now I determined which pin on the receiver not to use by checking continuity between each pin and power from the PS2 cable (red wire). I may have excluded the wrong pin (?). OR maybe I should have wired all 3 pins up.
When I turn the PC on, the mouse is detected, but the cursor always wants to stay in the top right. When I spin the ball left/right, it flicks over to the left, flashes a bit and then returns to the right. Spinning up/down does nothing (I'm not worried about this yet, I'll try & get 1 axis working first).
I guess what I need to know is: do I need to wire all 3 pins up from the receiver part of the mouse? Or if I only need 2, what is the best way to work out which?
Thanks for any help, I realise my description probably doesn't make sense :)
Minwah:
Also, is it OK to wire to the cables from the trackball, or should I solder straight to the receiver on the trackball? I think maybe that's what I did wrong...
hevnsnt:
I just wanted to show everyone the points on the intellimouse for +5 and GND. I decided I would rather pull this from the mouse rather than use a molex connector from my computer.
_Iz-:
Everything I've ever seen says not to use a Logitech mouse. I've never read why not, just not to ever try it with one.
When I did my mouse hack, I found the pinout for the plug, found the +5v pin, then used a continuity tester from that pin to find were the +5v wire attached to the mouse PCB. I then did a continuity test from that point to each of the 3 pins of each detector of the optics. The one with the least resistance was the +5v, the other 2 were signal. I found the ground wire the same way as the +5v. After that, it was just a matter of connecting wires to +5v, ground and the 4 signal points on the mouse PCB (I also completely removed the optics). Connect these wires to the right wires from the trackball and you're good to go.
hevnsnt:
exactly what I did.. I used a intellimouse not a logitech, I just wanted to show where these points were