DOCSLIB.ORG

Chapter 2 - Hardware 2.2 Input and Output Devices Grading

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Chapter 2 - Hardware 2.2 Input and Output Devices Grading Chapter 2 - Hardware 2.2 Input and Output Devices Grading: Notes: _______/20 Lesson Review: _______/20 Application Ext: _____/20 Input devices: _____/20 Output devices _____ / 20 Total points: _____/100 Essential Question Why is it important for input and output devices to be accessible to people with disabilities? Competencies 6670.49 Describe characteristics and functions of CPUs, motherboards, random access memory (RAM), expansion connections, hard drives, and CD-ROM drives. Section 2.2 Learning Goals After completing this section, you will be able to: Discuss input devices and their functions. Describe output devices and their functions. Terms audio-input devices pointing device audio-output device printer data projector ripping image-input devices stylus keyboard text-input devices monitor touch screen mouse user interface (UI) optical-character recognition (OCR) webcam output device Input Devices and Their Functions The means by which the user enters data and receives feedback is the user interface ( ) Keyboards o Device for textual and numeric data o Most basic input device 1 o Actions of Keyboards . Electrical signal is sent to CPU . CPU processes signal and provides to software Keyboards o Types of Keyboards o QWERTY . Dvorak . Virtual Factors in Evaluating Keyboards o Choose a keyboard that the intended use o Maintain comfort Pointing Devices o Allows the user to control the of the cursor on the screen o Mouse is most common type o Actions of Pointing Devices . Pointing . Clicking . Dragging . Double-clicking o Types of Pointing Devices . is a device with one or more buttons that can be moved on a flat surface to control the cursor . Touchpad . Graphics tablet . is a pen-like pointer, but without ink o Factors in Evaluating Pointing Devices . Should support the use of the computer . Wired or wireless Screens o Device that senses applied pressure and sends signals to the CPU o Actions of Touch Screens . Finger or stylus is used to apply pressure . Provides the basic functions of a pointing device o Types of Touch Screens . Tablets, smartphones, portable gaming devices . Interactive kiosks o In Evaluating Touch Screens . Accuracy of the pressure response . Size of areas for touching -Input Devices o Used to digitize images so they can be used by the computer o Actions of Image-Input Devices . Use electronics to create electrical signals to represent data . and digital cameras digitize images based on light o Types Of Image-input Devices 2 . camera . Webcam is an image-input device that can be mounted on top of a monitor or built into a laptop computer o Factors in Evaluating Image-Input Devices . Higher density . Page feeder on scanner -Input Devices o Generally, image-input devices used with software to convert the image to text that can be used by the computer o Actions of Text-Input Devices . Optical-character recognition (OCR) is software used with image to digitize text . Checks, typewritten documents, hand-written notes o Type of Text-Input Devices . Scanner with OCR software . Smartphones o Factors in Evaluating Text-Input Devices . intended use . Resolution and speed . OCR software -Input Devices o Convert sounds into data that can be used by the computer o Actions of Audio-Input Devices . Sampling . Typical sampling rate for CD quality is 44,100 times per second o Types of Audio-Input Devices . Microphone . is the process of extracting audio from a CD, DVD, or video file o Factors in Evaluating Audio-Input Devices . Supports intended use . Tonal qualities Input Devices for Users with Disabilities o of Accessible Input Devices . Depends on the nature of the disability . Purpose is the same as any other input device o Types of Accessible Input Devices . -recognition technology . Enlarged keyboard and touch-screen devices o Factors in Evaluating Accessible Input Devices . Simple and intuitive . Error rate Output Devices and Their Functions . Output device makes it possible for the user to communication from the computer . Monitors o Provide display outputs o Displays graphical interface o Actions of Monitors 3 . Each pixel is a tiny point of light . Current comes from CPU via the video card . Monitors o Types of Monitors . Liquid crystal display ( ) . Light-emitting diode ( ) . Cathode-ray tube ( ) . Factors in Evaluating Monitors . Screen size o Contrast ratio o Dot pitch o Resolution . Projectors o Data projectors collect video data from a computer and the images onto a separate screen o Actions of Projectors . Works like a monitor . Signal passes through a to separate signal into RGB, then recombine into a single beam projected onto a screen . Projectors o Types of Projectors . LCD, DLP, LCoS, LED . Choose type that best serves purpose . in Evaluating Projectors o Size o Weight . Printers o Transform computer information into a physical form o Actions of Printers . page based on the output from another software program . Deposits ink or toner onto paper based on instructions from driver . Printers o Types of Printers . Ink-jet and are widespread . Solid-ink, 3-D o Factors in Evaluating Printers . Speed . Resolution . Duty cycle . Cost . -Output Devices o Convert data in the computer into sounds o Actions of Audio-Output Devices . Uses decompression instructions to create the file . Replicated by hardware of device o Types of Audio-Output Devices 4 . Basic speakers, headphones, earbuds . Mixing board and advanced stereo systems o Factors in Evaluating Audio-Output Devices . Should support intended use . Output Devices for Users with Disabilities o Actions of Accessible Output Devices . Depends on nature of disability . of device is same as noncompliant device o Types of Accessible Output Devices . Larger monitors, magnification program, screen reader . Braille printer, closed captioning o Factors in Evaluating Accessible Output Devices . Simple and intuitive . Error rate Chapter 2: Hardware Section 2.2 Review 1. What is the function of the user interface? 2. Which input device senses applied pressure and sends signals to the CPU while providing the function of a computer monitor? 3. How does the purpose of an input device for users with disabilities differ from the purpose of a noncompliant device? 4. What is the most common output device? 5. What are the four factors to consider when evaluating an ink-jet or laser printer? 5 Multiple Choice: 6. Which is the most common type of computer monitor in use today? a) LCD b) CRT c) LED d) HD 7. Which of the following computer peripherals provides input? a) mouse b) touch pad c) keyboard d) All of the above. 8. Which of the following computer peripherals provides output? a) printer b) RAM c) microphone d) All of the above. Completion 9. In the United States, the most common keyboard is the layout. 10. The is the most common output Application and Extension of Knowledge Select a type of printer to research. Locate information regarding its cost of operation. Most manufacturers provide this information in sales or technical literature. Identify the specific ink or toner cartridge(s) the printer uses, and price the replacements from three different stores. Use Google Docs or Word Include: Printer Name Who manufactures What type of printer it is Type of ink/toner uses Price for inks Picture of the printer 6 7 Identify the Alternative OUTPUT Devices Write the device name by the identification number provided (1)____________________ (2)____________________________ (3)____________________________ (4)_______________________ (5)_____________________ (6)____________________________ (7)______________________ (8)_______________________ (9)____________________________ (10)_______________________ (11)____________________________ (12)___________________________ 8 Identify the Alternative INPUT Devices Write the device name by the identification number provided (1)________________________ (2)_______________________ (3)____________________________ (4)________________________ (5)_______________________ (6)_______________________ (7)______________________ (8)_________________________ (9)________________________ (10)_______________________ (11)________________________ (12)______________________ 9 .
Load more

Recommended publications
  • Class-4 Computer L-2 Input and Output Devices
    CLASS-4 COMPUTER L-2 INPUT AND OUTPUT DEVICES BOOK EXERCISE A. Tick () the correct options. 1. Which of the following is NOT an input device? a. touchpad ( ) b. projector () c. MICR ( ) 2. What does OCR stands for? a. Optical Character Recognition () b. Oriented Character Recognition ( ) c. Optical Copy Recognition ( ) 3. A plotter prints on paper by using . a. A stylus ( ) b. pencils ( ) c. pens () 4. Which of the following is an output device? a. projector ( ) b. laser printer ( ) c. both a and b () B. Fill in the blanks. Picture barcode biometric projection MICR typeface 1. A barcode is a pattern of parallel lines of varying width printed on different products. 2. OCR does not treat the text as picture. 3. A projector projects an image (or moving images) onto a large surface known as projection screen. 4. The MICR technology recognizes the data printed bin the MICR typeface. 5. A biometric device uses fingerprint, facial scans or voice recognition to identify users. CLASS-4 COMPUTER L-2 INPUT AND OUTPUT DEVICES C. Identify each of the following as input or output devices. Projector, Light pen, Touchpad, Touchscreen, web-cam, Monitor, Printer, Plotter, Keyboard, Mouse, MICR, Speakers, Scanner, OCR, Microphone. Ans: Input Devices Output Devices MICR Projector Touchpad Monitor Scanner Printer Touchscreen Speakers Keyboard Plotter OCR Web Cam Mouse Microphone D. Answer in one word- 1. A latest input device enables you to choose options on the computer screen by simply touching with a finger. (Touchscreen) 2. A device that projects an image onto a large surface. (Projector) 3. A device that draws on paper with one or more automated pens.
    [Show full text]
  • Hardware Components of a Computer System
    Hardware Components of a Computer Hardware Components of a computer refers to the collection of physical parts of a computer system that we can touch or feel. This includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others. The hardware components of a computer or personal computer is categorized into 4 primary categories: - a. System Unit b. Display Device c. Input Devices d. External Devices a. System Unit A System Unit is the main component of a personal computer, which houses the other devices necessary for the computer to function. It is comprised of a chassis and the internal components of a personal computer such as the system board (mother board), the microprocessor, memory modules, disk drives, adapter cards, the power supply, a fan or other cooling device and ports for connecting external components such as monitors, keyboards, mice, and other devices. System Unit Components b. Display Devices A display device is a personal computer component and is an output device that enables user to view the text and graphical data associated with a computer program. Display devices commonly connect to the system unit via a cable, and they have controls to adjust the settings for the device. They vary in size and shape, as well as the technology used. 1 Display Device c. Input Devices An input device is a personal computer component that enables users to enter data or instructions into a computer. The most common input devices are keyboards and computer mice.
    [Show full text]
  • Output Devices Drivers for Laser Xerographic and Electro-Erosion Printers 545
    TUGboat, Volume 11 (1990), No. 4 Contents Output Devices Drivers for Laser Xerographic and Electro-Erosion Printers 545 'I'&X Output Devices Drivers for Impact Printers and Don Hosek Miscellaneous Output Devices 553 Introduction Drivers for Phototypesetters 558 The number of device drivers (especially in the UNIX world) and proliferation of distribution venues for Screen Previewers 559 those drivers has caused it to be impossible to re- Amiga ....................559 tain the old format for the driver listings and pro- Apollo .................... 559 vide a useful amount of information (not to mention Atari ST. .................. 559 the difficulties in maintaining such a monster). The Cadmus 9200 ................ 559 listings are in the process of being installed into a Data General MV ............. 559 database to simplify answering driver queries and DEC Rainbow PC100 ........... 559 maintenance of information; this should allow fu- DEC-20 ................... 559 ture occurrences of these listings to be somewhat DEC RISC Ultrix. ............. 559 timelier . HP9000/500. ................ 559 The information is now broken down into four IBM MVS .................. 560 sections, one for each of laser xerographic printers. IBM PC ................... 560 impact printers, phototypesetters, and screen dis- IBM PC/RT ................ 560 plays. The listings are first by output device then by IBM VM/CMS ............... 560 computer hardware, except for the previewers which Sun Workstation .............. 561 are listed by computer. In those cases where a driver Unix ..................... 561 for a given printer runs on more than one computer, VAX/VMS ................. 561 the description of the driver is listed just under the Vaxstation/Unix .............. 562 name of the printer and cross-reference is made to it Vaxstation/VMS .............
    [Show full text]
  • Computer and Its Components Theory : 05 Marks Textbook Questions A
    Computer and Its Components Theory : 05 Marks Textbook Questions A. Multiple choice questions 1. The collection of unprocessed facts, figures and symbols is known as ____________. (a) Information (b) Software (c) Data and Information (d) None of the above Ans. (d) None of the above as the correct answer is data 2. ______________ is the processed form of data which is organized meaningful and useful. (a) Information (b) Software (c) Data (d) None of the above Ans. (a) Information 3. Hardware is any part of the computer that has a physical structure that can be seen and touched. (a) True (b) False (c) Not sure (d) None of the above Ans. (a) True 4. Components of computer hardware are ____________________________. (a) Input devices and output devices (b) A system unit and storage devices (c) Communication devices (d) All of the above Ans. (d) All of the above 5. __________ devices accept data and instructions from the user. (a) Output (b) Input (c) Components of hardware (d) Storage Ans. (b) Input 6. Which disk is made up of a circular thin plastic jacket coated with magnetic material? (a) Hard Disk (b) Compact Disk (c) DVD (d) Floppy Disk Ans. (d) Floppy Disk 7. ___________ disks are used to store more than 25 GB of data with a very high speed in less amount of time. (a) Digital Versatile (b) Compact (c) Blue‐Ray (d) None of the above Ans. (c) Blue‐Ray 8. Random Access Memory and Read Only Memory are examples of _______________. (a) Primary Memory (b) Secondary Memory (c) Auxiliary Memory (d) Both primary and secondary memory Ans.
    [Show full text]
  • Chapter 5 Input and Output Learning Objectives
    Learning Objectives • Identify several types of input and output devices and explain their functions. Chapter 5 • Describe the characteristics of the input equipment that most users encounter regularly, Input and Output namely, keyboards and pointing devices. • Explain what source data automation is and discuss how scanners and other devices can be used to accomplish it. Learning Objectives, cont’d. Overview • This chapter covers: • List several types of multimedia input devices and discuss their purposes. – Equipment designed primarily for input of • Describe the characteristics of the output equipment that programs and data into the computer most users encounter regularly, namely, display devices system, or for output, or for both. and printers. • Many other types of input/output devices • Discuss several types of multimedia output equipment. exist, but this chapter covers a good • Explain what a multifunction device is and list some sampling of the most widely used ones. advantages and disadvantages of using such a device. Input and Output Keyboards • Keyboards can differ in number of keys, key • Input devices convert data and programs that arrangement, types of special keys, and touch. people can understand into a form – QWERTY – widely used comprehensible to the CPU. – Dvorak – not used often • Output devices convert the strings of bits used • Function keys enable software packages to be by the computer back into a form that people customized to meet a user's applications needs. can understand. • The numeric keypad makes it easy to enter numbers quickly. 1 Ergonomic Keyboards • Designed to reduce or minimize repetitive strain injury of wrists – Provide more natural, comfortable position of wrists, arms, and hands Pointing Devices: Mouse • The most common pointing device – Movement on flat surface causes Common mouse movement of pointer on screen operations are clicking, • Several types scrolling, and dragging – Mechanical - small ball on underside rolls as and dropping.
    [Show full text]
  • Class -IV Super Computer Year- 2020-21
    s Class -IV Super Computer Year- 2020-21 1 1. Input and Output devices • Focus of the Chapter 1. Input devices 2. Output devices • Introduction The computer will be of no use unless it is able to communicate with the outside world. Input/output devices are required for users to communicate with the computer. An input device sends information to a computer system for processing. An input device tor a computer allows you to enter information. An output device can receive data from another device, but it cannot send data to another device. There are different devices of the computer that help it to do work. Input Devices The devices which are used to input the data and the program in the computer are known as "Input Devices". For the text input, keyboard are used, microphone is used for audio or sound input. 2 Keyboard The keyboard is the most common input device. A 'keyboard' is a human interface device which is "-presented as a layout of buttons. It is a text-based input device that allows the user to interact with the computer through a set of keys mounted on a board. Mouse After the keyboard, the mouse is the most common type of input device. A mouse makes the process of navigating the screen much easier than trying to use just a keyboard. A mouse usually uses a ball, light or a laser to track movement. Joystick A joystick is an input device consisting of a large pointed stick and input buttons on it. We can use this for playing games on the computer.
    [Show full text]
  • How to Use Webcam & Microphone for Teleconferencing Input/Output
    (760) 744-1140 ext. 2140 / [email protected] How To Use Webcam & Microphone for Teleconferencing • Webcams – Offer a video camera and microphone and use a USB plug. Resolutions options (in increasing order): 720p, 1080p, and 4k. They higher the resolution, the clearer the image will be, but will require more data usage to send and receive, which can be an issue for those with data-capped Internet plans or insufficient connectivity (poor WiFi signal, etc). • Headsets – Offer a feedback-free audio only solution. o Wired – Can use USB or 3.5mm (standard headphone) plugs. The USB models tend to be easier to set up, the 3.5mm models may require configuration settings to be changed on the computer. o Wireless – Use a USB dongle or Bluetooth connection. Allow the user to not have any cables, but will need to be recharged regularly. NOTE: Most of the desktop computer provided by Palomar do not have Bluetooth. • Microphone – Can use USB or 3.5mm plug. Offer better quality audio pickup, but can create feedback when used with speakers (which may be necessary for interactivity). NOTE: For audio-only solutions, Palomar College recommends a wired, USB headset. It will be the easiest to connect and use and will often the most reliable. They also tend to be more cost-effective than wireless options. Input/Output Configuration in Windows 10 Once an audio input/output device is connected to your computer, Windows should automatically make it your default device. If it doesn't please follow these steps to set the device as default: 1.
    [Show full text]
  • 5 Computer Organization
    5 Computer Organization Source: Foundations of Computer Science Cengage Learning 5.1 Objectives After studying this chapter, students should be able to: List the three subsystems of a computer. Describe the role of the central processing unit (CPU). Describe the fetch-decode-execute phases of a cycle. Describe the main memory and its addressing space. Define the input/output subsystem. Understand the interconnection of subsystems. Describe different methods of input/output addressing. Distinguish the two major trends in the design of computers. Understand how computer throughput can be improved using pipelining and parallel processing. 5.2 1 A computer can be divided into three broad categories or subsystem: the central processing unit (CPU), the main memory and the input/output subsystem. 5.3 5-1 CENTRAL PROCESSING UNIT The central processing unit (CPU) performs operations on data. In most architectures it has three parts: an arithmetic logic unit (ALU), a control unit and a set of registers, fast storage locations. 5.4 2 The arithmetic logic unit (ALU) The arithmetic logic unit (ALU) performs logic, shift, and arithmetic operations on data. Logic operations: NOT, AND, OR, and XOR. Shift operations: logic shift operations and arithmetic shift operations Arithmetic operations: arithmetic operations on integers and reals. 5.5 Registers Registers are fast stand-alone storage locations that hold data temporarily. Multiple registers are needed to facilitate the operation of the CPU. Data registers Instruction register Program counter The control unit The control unit controls the operation of each subsystem. Controlling is achieved through signals sent from the control unit to other subsystems.
    [Show full text]
  • PRACTICAL 1 to Indentify Basic Parts of Computers
    To Indentify basic parts of computers. Objective:- After completing this experiment, you will be able to: • Understand the different types of computer • Define the functions of every parts • Define the intention of software Computer A computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program or sequence of instructions on how the data is to be processed. Complex computers also include the means for storing data (including the program, which is also a form of data) for some necessary duration. A program may be invariable and built into the computer (and called logic circuitry as it is on microprocessors) or different programs may be provided to the computer (loaded into its storage and then started by an administrator or user). Today's computers have both kinds of programming. A computer system consists of both hardware and information stored on hardware. Information stored on computer hardware is often called software . The hardware components of a computer system are the electronic and mechanical parts. The software components of a computer system are the data and the computer programs. The major hardware components of a computer system are: • Processor(CPU) • Main memory • Secondary memory • Input devices • Output devices For typical desktop computers, the processor, main memory, secondary memory, power supply, and supporting hardware are housed in a metal case. Many of the components are connected to the main circuit board of the computer, called the motherboard . The power supply supplies power for most of the components. Various input devices (such as the keyboard) and output devices (such as the monitor) are attached through connectors at the rear of the case.
    [Show full text]
  • Graphical Output Devices
    CMP 477 Computer Graphics Module 2: Graphics Systems – Output and Input Devices Dr. S.A. Arekete Redeemer’s University, Ede Introduction The widespread recognition of the power and utility of computer graphics in virtually all fields has led to the development of a broad range of graphics hardware and software systems. Graphics capabilities for both two-dimensional and three-dimensional applications are now common on general-purpose computers, including many hand-held calculators. With personal computers, we can use a wide variety of interactive input devices and graphics software packages. For higher quality applications, we can choose from a number of sophisticated special-purpose graphics hardware systems and technologies. In this module, we explore the basic features of graphics hardware components and graphics software packages. Graphical Output Devices Output devices are needed to generate graphical outputs. Without an output device, you cannot know what processing has been done. Just as words (spoken or printed) will betray a human heart, so will output devices betray the graphics processing inside the computer Types of Graphical Output Devices Two types of outputs are possible: soft and hard Soft output forms use various forms of displays or monitor – CRT or LCD Panels, etc. Hard output forms are generated using printers or plotters Graphical output devices can be categorized into two: Computer terminals (Monitors) Hard copy Devices (Printers/Plotters) Types of Graphical Output Devices.. Graphical Output Devices
    [Show full text]
  • Lesson 1: Knowing About a Computer PROCESSING DEVICES OUTPUT
    Page 1 of 4 Worksheet – 4 Subject: - Computer Class: - IV Teacher: - Mrs. Suudha Sharma Name: _____________ Class & Sec: ________ Roll No. ______ Date: 30.04.2020 Lesson 1: Knowing about a Computer Earlier we have discussed about the various Input Devices. Now, let’s learn what are the various Processing Devices and Output Devices. PROCESSING DEVICES 1. The CPU is a chip inside the CPU cabinet, mounted onto the motherboard along with the other components. 2. The Central Processing Unit (CPU) is a processing device which does all the calculations, comparisons and decision making for a computer. 3. Motherboard is the main circuit board that contains the CPU. All the other input/output devices are connected to the motherboard. CPU further consists of the following two components: 1. Arithmetic and Logic Unit (ALU): The ALU does all the calculations, comparisons and decision making for a computer in the CPU. 2. Control Unit (CU): The CU control flow of information in the CPU. CU is like a traffic controller because it sends signals to the ALU to perform required operations. OUTPUT DEVICES An output device in a computer is used to show results. The common output devices are monitor, printer and speakers. Now-a-days Light Emitting Diode Monitor (LED) monitors are available in various sizes. It allows you to hear the sound coming from your computer. These Speakers are available in various size and qualities. Earphones These allow you to get the sound Headphones output in your ears only. &Earphones Earphones are smaller sized headphones. Headphones DOT MATRIX PRINTER: these use a Ribbon black ribbon to print.
    [Show full text]
  • Microphone and Audio Issues with My Logitech Webcam to Troubleshoot
    FAQ Microphone and audio issues with my Logitech webcam To troubleshoot your webcam microphone, do the following: Verify that you can hear sound through your speakers Test the microphone in Windows Sound Recorder Make sure the microphone is selected in the Logitech Webcam Software (LWS) Determine if the microphone drivers are loaded properly in Windows Device Manager Verify that you can hear sound through your speakers First confirm that you can hear sound through your audio output device (speakers / headphones) by doing the following: 1. Play a sample .wav or .mp3 file. NOTE: Sample files can be found in the My Documents/My Music/Sample Music folder on your computer. 2. Make sure your audio output device is functioning properly and isn't muted either on the device itself or through the Windows operating system. Muted Not Muted 3. If your computer audio is currently muted, to un-mute: 1. Click on your audio icon shown above. 2. Uncheck the box next to "Mute" by clicking in it. 3. Close the Volume panel by clicking anywhere on your screen. Test the microphone in Windows Sound Recorder NOTE: Before following the next steps, connect your webcam to an alternate USB port and make sure it is detected by your operating system. For instructions, see the Determine if the microphone drivers are loaded properly in Windows Device Manager section below. 1. Launch Windows Sound Recorder: 1. Windows XP: Start > All Programs > Accessories > Entertainment > Sound Recorder 2. Windows Vista: Start > All Programs > Accessories > Sound Recorder 2. Click the Record button and speak into the microphone on the webcam.
    [Show full text]