The ball in the mouse is used to make the mouse work.
X and Y rollers grip the ball and transfer movement and from there:
Optical encoding disks include light holes and Infrared LEDs shine through the disks.
Finally:
Sensors gather light pulses to convert to X and Y vectors.
I assume you mean a trackball. Most BlackBerries with trackballs are from the 8xxx series. Before that, they used roller wheels (7xxx and below), and after that (9xxx) they used an optical trackball (with a few exceptions, such as the Tour (9630 and 9650), which use an improved trackball, and now with the BB10 series they have touchscreen-only interfaces.
A trackball just like any other type of mouse are all considered to be input devices.You plug them in and when they are used, they send information into the CPU to do an action in your computer.
norm is genrally whereas standards are not genrally.
A trackball can move a cursor without needing a hard or level surface. A mouse needs such a surface to operate effectively.
You cannot change the trackpad out for a trackpad. If you want a trackball you need to get a Blackberry with a trackball such as a Tour 9630 or Curve 8330.
A cordless trackball is a type of human interface device for the computer. Specifically, it is an input device used to control the mouse cursor on a computer screen buy way of spinning a ball on top of the device with your fingers.
The three inventors used a bowling ball as the object in their trackball device. They created the trackball as part of a British Royal Navy radar system.
One can buy a Microsoft Trackball from Amazon for about $125. Some of the features include precision trackball design, five buttons and a wheel for scrolling and zooming. The Trackball is a sophisticated mouse for a laptop or a PC.
Could be a mouse, a trackball or a touchpad.
mouse, trackball, pen
AnswerAccording to the web site www.trackballworld.com the trackball was invented in 1949 by two Canadian engineers working on a new radar system. Full reference citation: http://www.trackballworld.com/trackball-history.htmlTom Cranston and Fred Longstaff invented the trackball.
A wireless trackball mouse can be purchased from many different retailers and stores. Some examples of stores that sell wireless trackball mouses include NewEgg and Radio Shack.