Re:Bluetooth Trackball Mark II
by codesnik on Wednesday February 03, 2021 @05:57AM
(#26012528)
how do you set an initial orientation of the cursor? how does it know, where's "up" cursor direction?
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It doesn't know so the initial orientation is arbitrary. You have to set the "up" direction by touching the ball with a magnet in the right spot (there's a reed switch inside) and rotating it around the Z (vertical) axis until the directions are correct.