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Trackball with smallest footprint?
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Ed ONeill:
What about hacking a trackball mouse.

Someone did it recently and I am going to start mine soon

Just my 2 cents
Ed

*edit* here is the link
http://www.arcadecontrols.org/yabbse/index.php?board=10;action=display;threadid=18282;start=msg179178#msg179178
neuromancer:
I hacked a logitech marble mouse for a small cp, and it worked really nicely. I just took the top off the mouse and carved the bottom of the panel so it would fit.

Not as nice as a "real" trackball, but fully functional.

Bob
Bgnome:
found this on a google search.. footprint is ~0.5" ;)
http://www.ittcannon.com/media/pdf/catalogs/Leaf/SW_nav_trackball.pdf
Stormy151:
Holy crap, that one is TINY!  If you ever wanted to build a 1/8 scale Centipede, that's the trackball you would use!

Thanks for the replies guys, I may go with that smaller one from Happs since it's got the USB already.  It's not that much more expensive than the Happs 2 1/4 with USB.
Hoagie_one:
I read that those 8mm trackballs are only like $1.50 each.  I submitted a question on minimum order requirments.

I may have to order like 100,000 to get em

hope not
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