An review of locator and selector device

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.

12. THANK YOU