2_output+and+input+devices

=Table of Contents=
 * ===Notes===
 * Unit objectives
 * Defination of input and output devices
 * I/O devices
 * ===Assignments===
 * [Replace this with assignment heading and date due i.e. Video Project (3/12/2010)]
 * ===Homework===
 * [Replace this with homework heading and date due i.e. Complete Worksheet 3 (3/23/2010)]
 * revision homework
 * revision homework

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Objectives: a) **identify** the following **input devices**: keyboards, numeric keypads, pointing devices (including mouse, touch pad and tracker ball), remote controls, joysticks, magnetic stripe readers, scanners, digital cameras, microphones, sensors, graphics tablet, MICR, OMR, OCR, barcode reader, video camera, web cams, light pens; pin pad, chip reader b) **identify suitable uses** of **the input devices** in (a) above, stating the advantages and disadvantages of each; c) **identify** the following **output** **devices**: monitors(CRT, TFT), printers (Iaser, ink jet and dot matrix), plotters, speakers, control devices – motors, buzzers, lights, heaters; d) **identify** suitable **uses** of the **output devices** in (c) above, stating the advantages and disadvantages of each.
 * Students will be able to:**

Assignments
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 * Device || Use || Advantages || Disadvantages ||
 * Keyboard || Entering text into a word processing document. Applications where text has to be created rather than copied. || Easy to use || easy to make mistakes, exesive use can lead to R:S:I. ||
 * Numeric keypad || Applications where only numeric data is to be entered. Inserting pin numbers for chip and pin credit/debit cards, or when using an ATM machine to withdraw money or check a bank balance. || easy to use, only one hand, shorter distance to travel when writing only numbers || higher cost of the keyboard when producing it because is bigger, the numbers appear twice, telephone layout is different to this one what con be confusing ||
 * Pointing devices – all || Applications which require selection from a graphics user interface. For example: the selection of data from a predefined list or menu. ||  ||   ||
 * Mouse || In most PCs || cheap, easy to use || only on flat surfaces ||
 * Touchpad || On Laptop computers || is smaller than a mouse || cant make a lot of movement with it, is too small ||
 * Trackerball || For use by people with limited motor skills e.g. young children or people with disabilities || doesnt need to be used only in flt surfaces ||  ||
 * Remote control || Using remote control devices to operate TVs, video players/recorders, DVD players/recorders, satellite receivers, HiFi music systems, data or multimedia projectors ||  ||   ||
 * Joystick || Used by a pilot to fly an aeroplane or flight simulator. Used in car driving simulators and for playing games. || give a better gaming experience || difficult to control for some people, break with much strenght ||
 * Touch screen || Selecting from a limited list of options e.g. certain POS uses such as cafes, tourist information kiosks, public transport enquiries. || faster to use || more expensive, if your typing is difficult ||
 * Magnetic stripe readers || At POS terminals, ATMs and in security applications || easy to use || cards can be demagnetised ||
 * Chip readers || At ATMs to obtain cash and in retail stores for bill payments || Secure, easy operation || is less common than magnetic stripe readers so sometimes it wount be available ||
 * PIN pad || At ATMs to obtain cash and in retail stores for bill payments || Is recognition an easy operation || if you only use you PIN is not so secure because other people can get it. ||
 * Scanners || Entering hard copy images into a computer || can pass info from paper to compter easily || scanned images ccan take up lots of space ||
 * Digital cameras || Taking photographs for input to computers, for input to Photo printers || is potable, can take mini videos, can delete photos || can break easily ||
 * Microphones || Recording of voices for presentation software || your voice can be converted into a sstem or a text with a voice software || the stored audio files will take up a lot of memory, voice comands are difficult to recocognise by the software ||
 * Sensors (general) || In Control (see 7.1d) and measuring applications (see 7.1c) || There are many tipes of sensors to use, they can detect many things, de pending on the type || Most of the sensors need an interface to convert the signals into digital ||
 * Temperature sensor || Automatic washing machines, automatic cookers, central heating controllers, computer-controlled greenhouses, scientific experiments and environmental monitoring ||  ||   ||
 * Pressure sensor || Burglar alarms, automatic washing machines, robotics, production line control, scientific experiments and environmental monitoring || accurate, stand high pressure (but depends on the type) || expensive ||
 * Light sensor || Computer controlled greenhouses, burglar alarm systems, robotics, production line control, scientific experiments and environmental monitoring ||  ||   ||
 * Graphics tablet || To input freehand drawings or retouch photographs || can draw pictures with your hand, easier than a mouse ||  ||
 * Magnet Ink Character Reader || To input magnetic characters, such as those found on bank cheques || 300 cheques per minute, 100% accuracy || very expensive ||
 * Optical Mark Reader || To input pencil marks on a form such as a school register, candidate exam answers, any application involving input of a choice of options || Fast, accurate || maybe marks are not read correctly because they are too light ||
 * Optical Character Reader || To input text to a computer ready for processing by another software package such as word processors, spreadsheets, databases etc. || cheaper than ppaying someone to pass all the information on their own to the computer || no 100% accurate, there can be ome mistakes during the process ||
 * Bar code reader || To input code numbers from products at a POS terminal, library books and membership numbers || can read bar codes that contain information of the manufacturate country, the person and a product code ||  ||
 * Video camera || To input moving pictures, often pre-recorded, pre recorded, into a computer || can record images || to have the in the computer you need to inmport them and that can tke too much time ||
 * Web cam || To input moving pictures from a fixed position into a computer || personal interactin, face to face ||  ||
 * Light pen || Where desktop space is limited, it is used Instead of a mouse or for drawing applications where a graphics tablet might be too big || more accurate drawings than mouse, take up less space ||  ||
 * Device || Use ||  ||   ||
 * CRT monitor || Applications where space is not a problem. Applications where more than one user may need to view screen simultaneously such as in design use, e.g. when several designers may need to offer suggestions on a prototype. ||  || occupies a lot of space, lower resolution than TFT ||
 * TFT monitor || Applications where space is limited such as small offices. Applications where only one person needs to view the screen such as individual workstations. || occupy a small space, less glare produced, less power consumed... ||  ||
 * Laser printer || Applications which require low noise and low chemical emissions, e.g. most networked systems. Applications which require rapid, high quality and high volumes of output, e.g. Most offices and schools. || high quality, noiseless, fast || sometimes need to wait for the ink to dry, ink expensive ||
 * Inkjet printer || Applications which require portability and low volume output where changing cartridges is not an issue. e.g. Small offices and stand alone systems. Applications which require very high quality output and where speed is not an issue, e.g. Digital camera applications. || high quality, low volume || very slow ||
 * Dot matrix printer || Applications where noise is not an issue and copies have to made, e.g. Industrial environments (multipart forms, continuous stationery, labels etc.). Car sales and repair companies. Manufacturing sites. || low price and low reparation price || noisy, low resolution ||
 * Graph plotter || CAD applications, particularly where large printouts are required such as A0 || can do large printings || low quality for images ||
 * Speakers || Any application which requires sound to be output such as multimedia presentations/web sites including encyclopaedias. Applications that require musical output such as playing of musical CDs and DVD films. || easy to use || can disturb other people, take up lots of space ||
 * Control devices || In Control applications (see 7.1d) || can help in many security problems || can be easily breaken and they can be set up and cause many problems ||
 * Motors || Automatic washing machines, automatic cookers, central heating controllers, computer-controlled greenhouses, microwave ovens, robotics, production line control || allow movement || some of them produce too much heat ||
 * Buzzers || Automatic cookers, microwave ovens || youll know if the food is cooked so its not too much time in he oven || some of them are quiet and cant hear them ||
 * Heaters || Automatic washing machines, automatic cookers, central heating controllers, computer-controlled greenhouses || outputs heat || if it doesnt have a sensor it can get too hot ||
 * Light/lamps || Computer-controlled greenhouses ||  ||   ||


 * TABLET PC || Is an input and output device || dont need keyboard, flat and easy to take around, aplication of drawing and writing is good || very expensive, slower than using a keyboard ||

** 1. **** Windows has a GUI. What does GUI stand for and give 2 features of a GUI. (3) **

A **graphical user interface** (**GUI**), often pronounced //gooey//, is a type of [|user interface] that allows users to [|interact with programs in more ways than typing] such as [|computers] ; [|hand-held devices] such as [|MP3] players, portable media players or gaming devices. ** 2. ** ** Briefly describe the difference between hardware and software (1) **

**__Hardware__** is the name given to the physical parts of a computer. In other words, the parts of the computer that you can touch, but software is name given to the computer programs that tell the hardware how to work, without software computer hardware would do absolutely nothing. ** 3. **** Every computer requires ROM. **

** a. **** What does ROM stand for? ** ** b. **** What vital instructions does it contain? ** ** c. **** Why is it important that it cannot be changed? (3) **

4. **Software - There are different types of software, the main types being system software, application software and utility software.** · ** System software and explain what it does. **  · ** Application software and explain what the household might use it for ** · ** Utility software and explain what it does **. (6)   · ** System software, ** usually called an operating system, is the name given to the software that controls the hardware and how all other software works. The most commonly used operating system is Windows, made by the Microsoft Corporation. · ** Application software ** is the name given to software that instructs a computer to carry out a specific task. It is application software that people choose to help them with a task when they use a computer. Writing a letter on a computer for example, a word processing application such as Microsoft Word would normally be chosen. · ** Utility software ** aims to protect and maintain the system software. Utility software do such tasks as protecting software against damage caused by computer viruses, backing up files and recovering files after software have stopped working
 * ROM stands for **Read Only Memory.**
 * It is mainly used to distribute [|firmware] [|software] that is very closely tied to specific [|hardware], and unlikely to need frequent updates.
 * It is important so that when you turn your computer off, or there is power lost and it just turns off , you don’t lose your information ,no matter what.
 * An average household will have many different programs installed on the computer, give an example of **

** 5.Every week Oakley College backs up the hard drive with all the students’ work. **  · ** What does ‘to back up mean (2) ** · ** Explain carefully, with reference to Oakley, 3 reasons why this is done. (3) ** ** To back up ** means save a copy of produced files or documents so they don’t get lost if something makes computer shut down or erase files from computer. ** A) ** So that people don’t lose important documents and files.  ** B) ** So that computer don’t loose important files and don’t break ** C) ** And so that data cant be accidentally deleted.


 * 1) ** Below are the specifications for two new computers. **

 ** Microsoft Office XP ** ||
 * Computer A **
 * __ DimensionTM 1100 __**
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Intel® Celeron® D 335 (2.80GHz, 533FSB, 256kB cache) ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Windows® XP Home Edition **
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 15" Analogue Flat Panel Monitor (15.0" v.i.s.) ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 80GB (7200 RPM) ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 48x CD-RW/DVD Combo Drive ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Now 512MB (Was 256MB) ** ||

 ** Microsoft Works 7.0 ** ||
 * Computer B **
 * __ DimensionTM 5150C __**
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Intel® Pentium® 4 630 with HT Technology (3.00 GHz, 2MB L2 cache, 800MHz FSB) ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Windows® XP Home Edition **
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 17" Flat Panel TFT Monitor ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 160GB Serial ATA Hard Drive (7200 RPM) ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** 8x DVD +/-RW drive ** ||
 * [[image:file:///C:/DOCUME%7E1/OSKARS%7E1.REI/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif width="8" height="7" caption="Bullet"]] || ** Now 1024MB (Was 512MB) **
 * 2 DAYS LEFT! ** ||

** a) **** What is the speed of the processor? ** 2.80 ghz  ** b) **** What is the size of the hard drive? ** 80GB ** c) **** How much RAM does it have? ** 512MB
 * For computer A **

** d) **** What type of screen does it have? **   17" Flat Panel TFT Monitor    ** e) **** What operating system is included? **   Windows® XP Home Edition   ** f) **** What application software is included? (6) **
 * For computer B **

 Microsoft Works 7.0

,


 * 7. Compter A costs 500€, while Computer B costs 900€. Despite the price explain why computer B would be a better computer for a digital photographer (who uses very large photographic files) to use. Give 3 reasons. **

** A) ** Computer B have more memory  **B)** Computer B have screen with better solution **C)** Computer B have Microsoft works ,that means more programs for photo editing.

** 8.For an average teenager with a music collection and a digital photo album which computer would be best and why? Give three reasons **

** (3) ** Computer A would be better because: A) It have enough memory B) It is cheaper C) It have good resolution.

Hard drive is used to save any data what so ever to computer.
 * 1) Computer B has double the amount of RAM than computer A, what difference will that make to a computer user. Give 2 differences. (2)
 * 2) The one with biggest RAM will work faster.
 * 3) It can operate some programs that the one with smallest ram cant
 * 4) Computer B has a much bigger hard drive than Computer A. What is a hard drive used for? (1)

Input / Output devices

· Input devices :magnetic stripe reader, Graphics tablet, CD drive, trackerball · Output devices webcam, tft monitor ,OMR, · Other.CPU,
 * 1) Sort the following list of hardware into:

OMR Magnetic stripe reader TFT monitor CPU graphics tablet web cam CD drive tracker ball (8)

· Monitor · Speakers · printer (3)
 * 1) In a school, the office uses many input and output devices. Name three output devices a secretary may use and explain what they would use them for.

Barcode reader, children can have some kinda card that have barcode on it and reader reads it and sends message to computers that student have used card ,therefore – is in school. (2)
 * 1) A school also uses input devices that an average household may not use. Name one input device that schools use to record pupil attendance.

At the POS (point of sale) where goods are bought and paid for: a) What input devices are used? Name three and explain what they do. Barcode reader, reads the code and sets the price  Keyboard if reader don’t work you can type the code in manualy  Magnetic stripe reader , reads credit card code  (6)
 * 1) Shops use many input and output devices to speed up the process of buying goods and controlling the amount of stock.

b) What type of printer is used and why Recite printer, its used for printing recites. . (2)

· You don’t have to but inc for laser printer every other week so its little bit cheaper. · It prints faster. · Laser printers usually have a scanner, so you don’t have to buy printer and scanner
 * 1) A small business is thinking about buying a new printer for its office. Give three reasons why a laser printer would be better for them. (3)

Cost effective – you don’t have to employ people. It is more accurate, because machines don’t make mistakes.
 * 1) The meteorological office use sensors to monitor the environment. Why do they use sensors to collect data and not humans? Give three reasons.

Homework
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