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LOCATOR AND
SELECTORS DEVICES
PRESENTED BY
AMIT MISHRA
B.C.A 5 SEMESTER
LOCATOR
• Locators are the devices which gives position Information. The computer
receives from a locator the coordinates for a point using a locator for a point
using a locator we can indicate a position on the screen.
• It has three types
a. Joystick
b. Mouse
c. Tablet
JOYSTICK
• A joystick has two potentiometers, they have Been attached to a single lever.
• Moving the lever forward or backward changes the setting on one
potentiometer.
MOUSE
• An input device that enables you to edit and manipulate images. For
example in terms of computer graphics , the mouse can be used to crop an
image or to use the magic wand tool etc.
TABLET
• A Tablet composed of a flat surface and a pen like stylus or like tablet cursor
• The tablet is able to sense the position of the stylus.
SELECTOR
• Selector devices are used to select a particular graphical object. A selector
may pick particular item but provide no information about that item is
located on the screen.
• it has several types
a. Keyboards
b. Light pen
c. Touch panels
d. Scanners
e. Track Ball
KEYBOARDS
• The keyboard is an efficient device for inputting such non graphic data.
• Cursor control keys are common features on general purpose keyboards.
• Additional a numeric keyboard is often included on the keyboard for fast
entry of numeric data.
LIGHT PEN
• An input device that allows you to draw on a screen with greater positional
accuracy, similarly to how you would on a graphics tablet it can also be used
to point at displayed objects
TRACK BALLS
• The track ball are an input device which is usually used with CAD
workstations.
• Trackballs are used to accurately draw on the computer trackballs and space
balls are mainly seen or used for games.
SCANNERS
• An input device that allows you to scan in images posters photographs etc.
which can the n be uploaded and edited in a graphic software package
TOUCH PANELS
• Touch panels allow displayed objects or screen positions to be selected with
the touch of a finger.
THANK YOU

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B.c.a dept ppt

  • 1. LOCATOR AND SELECTORS DEVICES PRESENTED BY AMIT MISHRA B.C.A 5 SEMESTER
  • 2. LOCATOR • Locators are the devices which gives position Information. The computer receives from a locator the coordinates for a point using a locator for a point using a locator we can indicate a position on the screen. • It has three types a. Joystick b. Mouse c. Tablet
  • 3. JOYSTICK • A joystick has two potentiometers, they have Been attached to a single lever. • Moving the lever forward or backward changes the setting on one potentiometer.
  • 4. MOUSE • An input device that enables you to edit and manipulate images. For example in terms of computer graphics , the mouse can be used to crop an image or to use the magic wand tool etc.
  • 5. TABLET • A Tablet composed of a flat surface and a pen like stylus or like tablet cursor • The tablet is able to sense the position of the stylus.
  • 6. SELECTOR • Selector devices are used to select a particular graphical object. A selector may pick particular item but provide no information about that item is located on the screen. • it has several types a. Keyboards b. Light pen c. Touch panels d. Scanners e. Track Ball
  • 7. KEYBOARDS • The keyboard is an efficient device for inputting such non graphic data. • Cursor control keys are common features on general purpose keyboards. • Additional a numeric keyboard is often included on the keyboard for fast entry of numeric data.
  • 8. LIGHT PEN • An input device that allows you to draw on a screen with greater positional accuracy, similarly to how you would on a graphics tablet it can also be used to point at displayed objects
  • 9. TRACK BALLS • The track ball are an input device which is usually used with CAD workstations. • Trackballs are used to accurately draw on the computer trackballs and space balls are mainly seen or used for games.
  • 10. SCANNERS • An input device that allows you to scan in images posters photographs etc. which can the n be uploaded and edited in a graphic software package
  • 11. TOUCH PANELS • Touch panels allow displayed objects or screen positions to be selected with the touch of a finger.