Introduction ‘Have you ever played video games before? Look at the joystick movement. When you...

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M208 – INPUT DEVICES

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Transcript of Introduction ‘Have you ever played video games before? Look at the joystick movement. When you...

Page 1: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

M208 – INPUT DEVICES

Page 2: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Introduction

• ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen move to the left too. The same thing happens when the joystick is moved to the right. The joystick controls the plane’s movement through its communication with the central processing unit in the game console.’

• A joystick is an example of an input device.

Page 3: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input

• Do you know what input means?• Input is any data or instruction that you enter

into the memory of a computer.• There are 4 types of input: – text– graphic – Audio; and – video.

Page 4: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices

• Input devices are any electronic devices connected to a computer and produces input signals.

• Examples of input devices are keyboard, scanner, microphone, web cam and a mouse.

Page 5: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices for Texts

• You can enter data such as text and commands into a computer by pressing the keys on the keyboard.

Page 6: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices for Texts

• You can press the keys of a virtual keyboard on the screen.

Page 7: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices for Texts

• An 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.

Page 8: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices for Graphics

• A scanner is a device that captures images from photo graphics prints, posters, magazine pages and similar sources for computer editing and display.

Page 9: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices for Graphics

• A digital camera allows you to take pictures and store the photograph images digitally.

Page 10: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices For Audio

• Audio input is the speech, music and sound effects entered into the computer

Page 11: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices For Audio

• This can be done using input devices such as a microphone and digital musical instruments like the Musical Instrument Digital Interface (MIDI) keyboard.

Page 12: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices For Video

• A Closed Circuit Television (CCTV) video Camera is a type of digital video camera that enables a home or small business user to capture video and still images.

Page 13: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices For Video

• A webcam is any video camera that displays its output on a web page.

Page 14: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Input Devices For Video

• A digital video camera allows you to record full motion and store the captured motion digitally.

Page 15: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Pointing Devices

end of M208

touch screengraphics tablet

trackballmouse

Page 16: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

M209 – OUTPUT DEVICES

Page 17: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Introduction

• A speaker is an example of an output device. It produces sounds.

• The printer is another example of an output device. It produces outputs, whether graphics or text in print.

Page 18: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Output

• Output is the result of data processing activity when it is presented external to the system.

• The output from a computer can be in a form for use by people, for example, printed or displayed.

Page 19: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

There are four types of output

Text-based Graphics-based

Audio-based Video-based

Page 20: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Output Devices

• An output device is hardware that is capable of delivering or showing information to one or more users.

• An output device shows, prints and presents the results of a computer’s work.

Page 21: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Types of Output Devices

• A display device is an output device that usually conveys text, graphics and video information.

• A printer is an output device that prints text and graphics on a physical medium such as paper or transparency film.

• An audio output device produces music, speech, or other sounds.

• Other output devices include Liquid Crystal Display (LCD) projectors and facsimile (fax) machines.

Page 22: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

A monitor• A monitor is an example of an output device

that can be used to display text.• It can be also display graphics and video

signals from a computer and displays information on its screen.

Page 23: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Printers• A printer is another example of an output

device that can be used to print text, apart from graphics, on mediums such as paper, transparency film or even cloths.

• A photo printer is a color printer that produces photo-lab-quality pictures.

Page 24: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Imagesetter• An imagesetter produces high quality output

compared to an ordinary laser printer.

Page 25: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Speaker• A pair of speakers is an audio output device

that generates sound.

Page 26: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Headphone

• A headphone is a pair of small speakers places over the ears and plugged into a port on the sound card.

Page 27: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

Projector

• A device that is used to project rays of light, especially an apparatus with a system of lenses for projecting slides or film on to a screen.

Page 28: Introduction ‘Have you ever played video games before? Look at the joystick movement. When you move the joystick to the left, the plane on the TV screen.

End of M208 & M209


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