input_deviceok.doc

7/27/2019 input_deviceok.doc

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Various Types of Pointing Devices

The Mouse

The mouse is the beginning standard for most pointing devices. Thetraditional mouse requires that the user perform three tasks at once grasp the mouse, move the mouse and click the mouse button at thesame time. Available in infinite styles and colors the basic elements

will be an internal encoder wheel moving past photo diodes and L!s,a ball on the bottom of the case to move against the mouse pad, andseveral buttons "right, left and sometimes center# for selecting optionsor drop$down menus. %ew ideas into the marketplace feature scrollwheels, more ergonomic and attractive designs, optical interface withthe surface for higher reliability "instead of the ball touching the mousepad and periodically getting gummed up# and wireless communication"&' or '(# with the host.

Trackballs

)oom image

*ince there are limitations to providing the motions required toactivate the traditional mouse, trackballs were invented. *omelimitations, for e+ample, resulted from reduced desktop space,possible lack of access to a flat surface for commuters, or realphysical handicaps of some people that made them incapable of

motion with their arms. *ometimes called 'oller balls- trackballs arebest described if you first turn the traditional mouse over to e+pose theball. &nstead of having the ball rest below with the motion activated byyour hand, the ball rests on top with the motion activated by yourfingers. All of the internal components and outside custom peripheraloptions remain the same as those available on the mouse. ften thechoice between a mouse and a trackball is /ust an operatorpreference.

0oysticks)oom image

1hen space becomes even more of a constraint or range of motion isfurther limited, /oysticks are used. &n this case, continuous or dynamicmotion is provided through moving a lever or stick- in the direction ofmotion desired for the system or cursor. The button selection

functions can be provided alongside the /oystick, similar to those onthe mouse.

Micro0oysticks

)oom image

1hen space is at a premium, several suppliers in the marketplaceprovide miniature /oysticks that are accessed with the motion of yourfinger. *ensitive to touch and easily located between two keytops,these miniature /oysticks have become quite popular on laptopkeyboards and are easily located beneath a protective surface ifenvironmental conditions warrant.

(*'!evices

)oom image

1hen space and height are both limiting parameters, a (*' "(orce*ensing 'esistors# device fits easily under a button or elastomer

keypad where it can be protected from the environment or from sideangle breakage "see image#. The device that records movement is aresistive layer, much like a touch screen in actuation and thickness,that is thinner than the mechanical encoders found on your trackballor mouse.
http://mm_openbrwindow%28%27pop_ptdevice_trackball.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D440%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_joystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D430%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_microjoystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D325%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_fsrdevices.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D475%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_fsrdevices.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D475%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_microjoystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D325%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_joystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D430%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_trackball.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D440%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_joystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D430%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_microjoystick.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D325%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_fsrdevices.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D475%2Ctop%3D0%2Cleft%3D0%27%29/http://mm_openbrwindow%28%27pop_ptdevice_trackball.html%27%2C%27winzoom2%27%2C%27scrollbars%3Dno%2Cwidth%3D444%2Cheight%3D440%2Ctop%3D0%2Cleft%3D0%27%29/


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Types of Input Devices

There are lots of common types of input devices, almost too many to mention. 2owever, themost common are keyboards, pointing devices, scanners, and now speech recognitiondevices.

3eyboards

(a+ modems

4ointing devices

*canners

*peech recognition devices

Special purpose input devices

*pecial purpose input devices are widely used in information technology.

Thermometers, barometers, earthquake detectors and atmosphericinstruments may be used by scientists.5raphics tablets, digital or video cameras, or even synthesi)ers maybe used by artists and designers.

The variety of potential input devices is only limited by the human imagination.

Pointing Devices

*everal input devices have been developed to make it easy to e+ecute commands by pointing to,clicking on, and dragging things around on the screen. Although the mouse is the most commonsuch device, there is a surprising variety available.

Mice

Track sticks

Trackballs

(ingers

Touch pads

5raphics tablet

0oysticks

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Output Devices

nce data has been input and processed you need access to it in a form you can use. Thedevices you use to do this are called output devicesbecause data is sent or output to themfrom the computer. The output can be in the form of words, numbers, graphics, sounds,videos, and animations.

4rinters

Monitors

*peakers

9luetooth and wireless routers

?irtual reality feedback devices

!ata pro/ectors.

Special purpose output devices

There are a number of specialised output devices created for use by industry.

+amples of these include specialised robotic equipment used for cuttingand printing shapes out of vinyl, metal and wood, the microwave devices


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used in telecommunications and three$dimensional printers.

More common special purpose output devices include>

4rinters

Monitors*peakers

9luetooth and wireless routers

?irtual reality feedback devices

!ata pro/ectors.

Documents

input_deviceok.doc