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IGCSE ICT - PEARSON EDEXCEL PAPER 1 > 1.4 TYPES OF PERIPHERAL DEVICES - INPUT AND OUTPUT > Flashcards

1.4 TYPES OF PERIPHERAL DEVICES - INPUT AND OUTPUT Flashcards

1
Q

WHAT IS AN OUTPUT PERIPHERAL DEVICE?

A

Peripherals that are connected to a computer and outputs the result of computer processing.

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2
Q

FUNCTION OF A MONITOR

A

Users can see output from computer display. Screen size measured diagonally, Resolution measured in pixels.

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3
Q

WHAT ARE THE TYPES OF PRINTERS?

A

Dot matrix
Inkjet
Laser
3D

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4
Q

DOT MATRIX

A

Print made by hitting paper through a ribbon of ink. Paper often has a number of carbon copy (paper made of carbon). Slowest type of printer. Cheap. Low cost of printing copy. Low quality. Used when multiple copies are required. Doesn’t usually print colour.

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5
Q

INKJET

A

Uses cartridges (cyan, magenta, yellow). Tiny dots of ink sprayed on paper forming print. Fast. Medium cost. High cost of printing copies. Prints colour. High quality. Used in home printing and photographs.

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6
Q

LASER

A

Printer contains rotating cylinder holding electrical charge. Laser is used to discharge certain points on drum and create image. Electrically charged toner is attracted to points on drum and is heated onto paper that is passed over drum. Fastest printer. Expensive. Medium cost per copy. Prints colour. Highest quality. Used in high-volume printing, often offices.

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7
Q

3D

A

Creates real-life versions of digital modules (AIRPLANE PARTS, ARTIFICIAL LIMBS, CAR PROTOTYPES).

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8
Q

PLOTTERS

Used by cartogrophers and engineers

A

Draws high quality images created in CAD software onto large paper.

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9
Q

WHAT IS CAD SOFTWARE?

A

Computer Artificial Design Software.

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10
Q

DATA PROJECTORS

A

Used in home entertainment systems and in giving presentations.

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11
Q

WHAT ARE THE FEATURES OF DATA PROJECTORS?

A
  • Light bulbs - expensive
  • Resolution
  • Zoom
  • Portability
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12
Q

WHAT ARE THE TWO TYPES OF ZOOM IN DATA PROJECTORS?

A
  1. OPTICAL ZOOM - Zoom in
  2. DIGITAL ZOOM - Zoom into specific area on screen.
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13
Q

SPEAKER

A

Computer can output sound.

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14
Q

WHAT ARE THE 3 TYPES OF SPEAKERS?

A
  • Single speaker
  • Stereo speaker
  • Surround sound
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15
Q

SINGLE SPEAKER

A

Low quality sound - comes from one speaker

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16
Q

STEREO SPEAKER

A

Sound comes from both speakers

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17
Q

SURROUND SOUND

A

Sound is produced everywhere

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18
Q

CONTROL DEVICES (ACTUATORS)

A

Components in a system that makes something happen in the real world.

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19
Q

EXAMPLES OF CONTROL DEVICES?

A
  • Valves
  • Pistons
  • Heaters
  • Coolers
  • Motors
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20
Q

WHAT IS AN INPUT PERIPHERAL DEVICE?

A

Peripheral devices that send data to computer. User can control computer from sources outside the system.

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21
Q

KEYBOARD

A

Use keys to interact with software. Sends data to computer wired / wireless.

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22
Q

WHAT DO MICE USE TO MOVE?

A

Use optical sensor to recognise movement of device. Sensitivity can be affected by surface its on. Some mice use roller balls to control pointer.

23
Q

TRACKER BALL

A

Roll to move pointer. No buttons.

24
Q

TRACK PAD

A

Sensors finger movements, touch and press.

25
Q

JOYSTICK

A

Used in game controllers to move sprites in game.

26
Q

GRAPHICS TABLET

A

Use stylus to draw

27
Q

SCANNER

A

Use image/light sensors to record documents/images.

28
Q

WHAT ARE THE TWO TYPES OF SCANNERS?

A
  1. OMR READER
  2. OCR READER
29
Q

OMR READER

A

Optical Mark Recognition. Detects simple marks on computer.

30
Q

WHAT IS OMR COMMONLY USED FOR?

A

Used for recognising and recording responses in multiple choice tests.

31
Q

OCR READER

A

Optical Character Recognition. Reads characters in a document and stores result as text file.

32
Q

DIGITAL CAMERAS

A

Uses light sensors to capture images formed by light passing through device’s lens.

33
Q

WEBCAM

A

Lower quality than camcorders. Can be used as security cameras. Stream videos on internet. May have built in microphone.

34
Q

MICRPHONE

A

Captures sound. Diaphragm moves when air hits it.

35
Q

WHAT IS A DIAPHRAGM?

A

Thin, round object. In telephone, loudspeaker. Moved by sound and when producing sound.

36
Q

WHERE IS TOUCH SCREEN USED?

A

Used in smartphones, input data by using a touch.

37
Q

WHAT ARE THE TWO TYPES OF TOUCH SCREEN?

A
  1. Resistive.
  2. Capacitive
38
Q

RESISTIVE SCREEN

A

Pressure when touch causes the two layers underneath to make a connection. More durable. Harder to read because more layers reflect more light. Only recognises one touch at a time.

39
Q

CAPACITIVE SCREEN

A

Under glass layer there is a capacitive layer. Conducts electricity when screen is touched as small charge flows from finger. Used in smartphones. Closer finger is to charged area means more current is flowing away.

40
Q

WHAT ARE THE TWO TYPES OF BARCODE SCANNERS?

A
  1. Linear
  2. Matrix
41
Q

LINEAR

A

Detects barcodes - pattern of lines. Found on parcels

42
Q

MATRIX

A

QR codes. Holds more information than linear. Scanned from any angle.

43
Q

BIOMETRIC SCANNER

A

Measures unique physical characteristics.

44
Q

EXAMPLE OF BIOMETRIC SCANNER?

A

1.Fingerprint (arch, loop, whorl)
2. Voice recognition
3. Face recognition.
4. Iris recognition

45
Q

ADVANTAGES OF USING BIOMETRIC SCANNERS?

A

-not forgotten
-more difficult to trick
-speeds up transactions
-not restricted by language barriers

46
Q

DISADVANTAGES OF USING BIOMETRIC SCANNERS?

A

-privacy and security concerns as detailed personal information is being stored electronically
-possible to trick
-expensive to buy
-uncomfortable

47
Q

MAGNETIC STRIP READER

A

Reads data stored on a magnetic strip

48
Q

CHIP AND PIN READER

A

Reads data stored on a PIN

49
Q

SENSOR

A

Enter data about physical environment. Can be placed in dangerous places. Monitors continually. Removes possibility of human error. Senses things humans can’t. Data is easily converted into digital form.

50
Q

EXAMPLES OF SENSORS?

A

-light sensor
-moisture and humidity sensor
-temperature
-proximity and distance sensors
-motion and movement
-pressure

51
Q

CARD READERS

A

Reads data stored on a card.

52
Q

WHAT CAN YOU DO WITH A CARD READER?

A

Unlock doors, secure areas, make payments, track people.

53
Q

EXAMPLES OF CARD READERS?

A

-magnetic strip
-programmable chip
-RFID (Radio Frequency Identification)
NFC (Near Field Communication)

IGCSE ICT - PEARSON EDEXCEL PAPER 1 (24 decks)

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