CHAPTER 7: INPUT AND OUTPUT

WHAT IS INPUT ?

Input is the data or instructions that we insert into the memory of computer.

Commonly input method include:

1.     Keyboard

2.       Pointing devices

3.       Touch screens

4.       Pen input

5.       Motion input

6.       Voice and audio input

7.       Video Input

8.       Scanners and reading device

1.0   Keyboard

-is an input device that contain keys that users can press to enter the data into  computer or mobile devices.

-an ergonomic keyboard has design that reduces the chance of repetitive strain injuries.

2.0   Pointing devices

-A mouse is a pointing devices that fits under your palm perfectly.

-Touchpad is sensitive to pressure and motion 

Figure 1.0 Touchpad

-Trackball has ball on its top or side

Figure 1.1 Trackball

-Pointing stick are pressure-sensitive that positioned between keys on a mobile computer keyboard

Figure 1.2 Pointing stick

3.0 Pen Input

-You touch a stylus or digital pen on a flat surface to write, draw, or make selections

Figure 1.3 Stylus or digital pen

4

4.0 Motion Input

-Sometimes called gesture recognition, users can guide on-screen elements using air gestures

Figure 1.4 VR

5.0 Voice Input and Audio Input


Voice Input

Audio Input
-process of entering any sound into the computer such as speech, music, and sound effects

6.0 Video Input
-Video input is a process of capturing full-motion images and storing them on a computer or mobile device’s storage medium.
-a webcam is a type of digital video(DV) camera that user can :-

-capture video and still image

-send email with video attachment

-add live images to  instant message

-broadcast live image over the internet

-conduct video conferences

-video calls

7.0 Scanners and Reading Device

-A scanner is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process

-A flatbed scanner  similar to a copy machine except it creates a file of the document in memory instead of a paper copy. 

Figure 1.5 Flatbed Scanner

Figure 1.6 How a flatbed scanner works.

-optical reader is a device that uses a light source to read characters,  marks, and codes 
and then converts them into digital data that a computer can process.

Figure 1.7 OCR vs OMR

-A bar code reader, also called a bar code scanner uses laser beams to read bar code
-A QR code stores information in both a vertical and horizontal direction.
-Magstripe readers read the magnetic stripe on the back of cards such as: 

(credit cards, entertainment cards, bank card and identification card)

WHAT IS OUTPUT?

Output is data that has been processed into a useful form.

A display visually conveys text, graphics, and video information.

-A monitor is a display that is packaged as a separate peripheral device as 

example LCD monitor.

Today’s monitors use a digital signal to produce a picture

•To display the highest quality images, the monitor should plug into:

•A DVI port

•An HDMI port

•A Display Port

Figure 1.8 DVI and HDMI

Figure 1.9 Display port 

•Home users sometimes use a digital television (DTV) as a display

•HDTV is the most advanced form of digital television

•A Smart TV is an Internet-enabled HDTV

-A printer produces text and graphic on a physical medium 

-A nonimpact printer forms characters and graphics on a piece of paper without actually contacting the paper

>Ink-jet printer

>Photo printers 

>Laser printers

>All-in-one printers

>Thermal printers

>Mobile printers

>ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink on a piece of  paper

-Color or black-and-white

-Speed is measured by the number of pages per minute (ppm) it can print

>An all-in-one printer is a single device that prints, scans, copies, and in some cases, faxes

-Sometimes called a multifunction printer

>A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper

Figure 2.0 Thermal Printer

>A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device

Figure 2.1 Mobile Printer

>A label printer is a small printer that prints on an adhesive-type material that can be placed on a variety of items.

Figure 2.2 Label Printer

>Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper.

Figure 2.3 Impact Printer

Other output device 

-speakers

-headphone

-earphones

-data projector

-Joysticks, wheel, gamepads, and motion-sensing controllers

ASSISITIVE TECHNOLOGY INPUT AND OUTPUT

Figure 2.4 Mounted Printer to create replica by printing

Figure 2.6 Braille input on computer keyboard

Figure 2.5 Braille input

Figure 2.7 Braille Printer

MICROSOFT POWERPOINT

- Microsoft powerpoint , majority of students get buy 1 free 1 coupon. *limited
- As there is an assignment that need to present, lecturer taught us a little bit more about powerpoint such as hyperlink, design, animatin, transition, audio. so that we can apply them during presentation.