Devices for inputting information into a computer presentation. Presentation of "information input devices". RAM capacity

Slide 11

Manipulators

Mouse; Trackball; Joystick.

Slide 12

Touch devices:

Touch screen; Light pen; Graphics tablet (digitizer)

Slide 13

Scanning devices:

Scanner Depth color recognition; Optical resolution, or scanning accuracy; Software included with the scanners; Design. OCR devices

Slide 14

Speech recognition devices

Most speech recognition systems can be tuned to the characteristics of the human voice. This is realized by comparing the spoken word with samples previously recorded in the computer's memory. Some systems are able to identify the same words spoken by different people. Speech recognition and correction functions are indispensable for the formation of correct pronunciation.

Slide 15

Questions:

Slide 16

Homework:

Slide 17

Thank you for the lesson

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Abstract

Computer science lesson in 7th grade.

OU: Gymnasium No. 1

Teacher

Subject

Lesson type: learning new material

Goals: (slide 2)

Tasks:

Educational:

Educational:

activity,

independence,

accuracy,

respect.

Lesson plan:

Reflection (2 min.).

Homework (2 min.).

Lesson summary (1 min.).

During the classes

Organizing time.

Checking homework.

Learning new material.

With keyboard input, which involves manual input from the keyboard;

With direct input, in which data is read directly by computer devices.

Keyboard (slide 6)

The shape of the letter V and separation in the middle, the angle between the parts can be smoothly changed depending on the structural features of a person’s hands;

Large palm rests to keep your hands straight;

Membrane silent replacement for keys;

Function key field -

Manipulators (slide 11)

Mouse

Trackball

Joystick

Touch devices input (slide 12)

Touch screen

Light pen

Scanning devices (slide 13)

Scanner

Scanners differ in the following parameters:

Color recognition depth;

Design.

(slide 14)

(slide 15)

Questions for the class:

How can input devices be classified?

What is the difference between an ergonomic keyboard and a regular one?

What devices form the class of manipulators and what is their purpose?

Name the main characteristics of mice.

List the characteristic features of touch input devices.

What are the main characteristics of scanners?

How are speech recognition used?

Reflection.

Homework.(slide 16)

Learn notes in a notebook, prepare short messages on the topic “Information output devices.”

(slide 17)

Computer science lesson in 7th grade.

OU: Gymnasium No. 1

Teacher: Kondakova Lyudmila Vyacheslavovna

Subject: “Input devices” (slide 1)

Lesson type: learning new material

Goals: (slide 2)

Find out what the purpose and classification of input devices are, what the main fields of the keyboard are intended for;

Get acquainted with the main characteristics of manipulators, touch devices, scanning devices and speech recognition devices;

Tasks:

Educational:

develop a worldview (i.e., contribute to the formation of views on the world around us);

develop the ability to compare, draw parallels between concepts;

Educational:

cultivate personal qualities:

activity,

independence,

accuracy,

respect.

Lesson plan:

Organizational moment (1 min.).

Setting goals and formulating lesson objectives (2 min.).

Checking homework (3 min.).

Learning new material (19 min).

Consolidation of the studied material (10 min.).

Reflection (2 min.).

Homework (2 min.).

Lesson summary (1 min.).

During the classes

Organizing time.

Hello guys. Today we will teach you an unusual lesson, you have already prepared short messages on each device, this was homework.

Setting goals and formulating lesson objectives.

Today in the lesson we will learn what the purpose and classification of input devices are and get acquainted with the main characteristics of manipulators, touch devices, scanning devices and speech recognition devices. The main objective of our lesson is to become familiar with input devices and their characteristics. And you will help me with this today.

Checking homework.

After setting goals and objectives, the teacher asks students to show their reports.

Learning new material.

A computer, like a person, needs its own “eyes and ears”, with the help of which it could perceive information from the outside. Currently, there are various devices that perform these functions as part of a computer. They are called input devices because they provide input into the computer of data in various forms: numbers, texts, images, sounds.

Input devices are hardware used to convert information from a human-readable form to a computer-readable form. (slide 3)

Computer hardware for data input includes the input device itself, a control unit called a controller (adapter), special connectors and electrical cables. However, to achieve proper operation of both the input and output devices, proper hardware connections alone are not enough. It is required to load a special control program, called a driver.

A device driver is a program that controls the operation of a specific input/output device.

Input devices can be divided into two classes according to the method of entering information: (slide 4)

With keyboard input, which involves manual input from the keyboard;

With direct input, in which data is read directly by computer devices.

In turn, speech recognition stands out among devices with direct data input. Let's look at the main characteristics of these classes technical means. (slide 5)

Keyboard (slide 6)

The standard device for entering information into a computer is the keyboard. With its help you can enter numeric and text information, as well as various commands and data.

Typically, information entered from the keyboard is displayed on the monitor screen for control purposes. The location where information is entered on the screen is indicated by a special icon called a cursor.

In the modern computer market, ergonomic keyboards and special wrist pads are very popular, providing the most comfortable working conditions. Various models of ergonomic keyboards have: (slide 7)

The shape of the letter V and separation in the middle, the angle between the parts can be smoothly changed depending on the structural features of a person’s hands;

Large palm rests to keep your hands straight;

Membrane silent replacement for keys;

A touchpad, the movement of your fingers on which replaces the action of the mouse. (slide 8)

Working on a personal computer is impossible without mastering the keyboard.

With all the variety of designs, any keyboard has the following groups of keys: (slide 9)

Alphanumeric key field - for entering upper and lower case letters, numbers, various characters and other symbols.

Control key field – for entering and executing commands, for editing data.

Function key field -. Each key in this field, as a rule, has one or another function assigned to it. The purpose of these keys is determined by the one used in this moment program.

Cursor control key field – for moving the cursor on the monitor screen.

The key field of the small (numeric) keyboard allows you to work in two modes depending on the indicator Num Lock located above this field.

Purpose of the main control keys (slide 10)

Manipulators (slide 11)

Mouse

Next to the keyboard is a movable device called a mouse. There is a ball on the bottom surface of the mouse. Moving the mouse on a flat surface (table, rug) causes the ball to rotate. At the same time, it interacts with sensors inside the mouse body, resulting in a signal that causes the mouse pointer to move on the monitor screen. There are 2 or 3 buttons on the top surface of the mouse.

Different types of mouse differ from each other:

Method of reading information (mechanical, optical-mechanical, optical);

Number of buttons (2- and 3-button mouse);

Method of connection to the computer (wired, wireless).

Mouse design involves various forms of structures. The most popular are ergonomic mice, which have a streamlined surface and ensure natural placement of the hand on its surface.

Trackball

The trackball resembles an upside-down mouse. You don’t need to move it around the table like a mouse. In a trackball, the ball is rotated by hand and the rotation is also converted into moving the pointer across the screen.

Joystick

The joystick, or control stick, was designed specifically for gaming. Just like a mouse and trackball, it allows you to move a cursor or graphic object across the monitor screen. The joystick is a handle that tilts in all directions, and several buttons on a small panel for performing simple actions. Joysticks have a different number of buttons and the number of directions for moving the cursor around the screen.

Among the latest models, the most successful joystick with power feedback to events happening on the screen.

Touch input devices (slide 12)

Touch screen

A touch or tactile screen is a surface that is covered with a special layer. Touching a specific location on the screen selects a task to be performed by the computer or a command from the on-screen menu.

Light pen

A light pen is similar to a regular pencil, at the tip of which there is a special device - a light-sensitive element. The contact of the pen with the screen closes the photoelectric circuit and determines where data is entered or corrected. If you move this stylus around the screen, you can draw or write on the screen as you would on a piece of paper.

Graphics tablet or digitizer

A graphics tablet, or digitizer, is used to create or copy drawings or photographs. It allows you to create drawings just like on a piece of paper. The image is converted into digital form, hence the name of the device. The conditions for creating an image are close to real ones; it is enough to use a special pen or finger to make a drawing on a special surface.

Scanning devices (slide 13)

Scanner

Devices for scanning images, such as texts or drawings, have become widespread these days. The term “scanning” comes from the English verb to scan, which means “to look closely.” The scanner is designed to enter graphic or text information into a computer from a sheet of paper, from a page of a magazine or book.

Scanners differ in the following parameters:

Color recognition depth;

Optical resolution or scanning accuracy;

Software included with the scanners;

Design.

Important scanner characteristics also include scanning time and maximum size scanned document.

OCR devices

Such devices include, for example, terminals installed in large stores. These terminals are equipped with a variety of barcode readers – special characters and tags to determine the conditions for purchasing the product and its price.

Speech recognition devices (slide 14)

Using a regular microphone, a person's speech is directly input into the computer and converted into digital code. Most speech recognition systems can be tuned to the characteristics of the human voice. This is realized by comparing the spoken word with samples previously recorded in the computer's memory. Some systems are able to identify the same words spoken by different people. Speech recognition and correction functions are indispensable for the formation of correct pronunciation.

Consolidation of the studied material.(slide 15)

Questions for the class:

How can input devices be classified?

What is the difference between an ergonomic keyboard and a regular one?

What devices form the class of manipulators and what is their purpose?

Name the main characteristics of mice.

List the characteristic features of touch input devices.

What are the main characteristics of scanners?

How are speech recognition used?

Reflection.

Guys, now let’s remember what we learned new today and systematize the new knowledge (one student answers, the rest complement).

Homework.(slide 16)

Learn notes in a notebook, prepare short messages on the topic “Information output devices.”

Lesson summary. Thank you all for the lesson, goodbye!(slide 17)

Slide 2

Classification of input devices

Input devices are hardware for converting information from a human-readable form to a computer-readable form.

Slide 3

Input devices according to the method of entering information can be divided into two main classes:

With keyboard input, in which manual input is carried out from the keyboard. With direct input, in which data is read directly by computer devices. Input devices Direct input devices Keyboard input devices Manipulators Touch Scanning devices Speech recognition

Slide 4

Keyboard

The standard device for entering information into a computer is the keyboard. With it, you can enter numeric and text information, as well as various commands and data.

Slide 5

Manipulators

Mouse. Next to the keyboard is a movable device called a mouse. There are 2 or 3 buttons on the upper surface of the mouse. The computer perceives pressing a particular button (click) of the mouse as an indication to perform some specified action. Using a mouse allows you to more quickly and conveniently control the operation of various programs. Joystick. The joystick, or control stick, was designed specifically for gaming. The joystick is a handle that tilts in all directions, and several buttons on a small panel for performing simple actions.

Slide 6

Touch input devices

Touch screen. The touch screen is a surface that is covered with a special layer. Touching a specific location on the screen selects a task to be performed by the computer or a command from the on-screen menu. The touch screen also allows you to move objects. It is easy to use, especially when needed fast access to information. Network pen. A network pen is similar to a regular pencil, at the tip of which there is a special device - a photosensitive element. The contact of the pen with the screen closes the photovoltaic network and determines where data is entered or corrected. If you move such a pen across the screen, you can draw or write on the screen, as if on a sheet of paper.

Slide 7

Scanning devices.

Scanner. The scanner is designed to enter graphic or text information into a computer from a sheet of paper, from a page of a magazine or book. A scanner is required for operation. software, which creates and stores an electronic copy of the image in memory. Important characteristics of the scanner also include scanning time and the maximum size of the scanned document.

Slide 8

OCR devices

Such devices include, for example, terminals installed in large stores. These terminals are equipped with a variety of devices for reading barcodes - special symbols and marks to determine the conditions for purchasing a product and its price. The read information is converted, displayed on a screen or a paper receipt, and transmitted via communication lines to a more powerful computer for further processing.

Slide 9

Speech recognition devices

Using a regular microphone, a person's speech is directly input into a computer and converted into digital code. Most speech recognition systems can be tuned to the characteristics of the human voice. This is realized by comparing the spoken word with samples previously recorded in the computer's memory. Some systems are able to identify the same words spoken by different people. There are systems that not only recognize speech, but also translate from one language to another. Speech recognition systems are widely used in education, for example in studying foreign languages. Speech recognition and correction functions are indispensable for the formation of correct pronunciation.

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Universal device display numeric, text and graphic information. Inseparable from the monitor, you need to consider the computer's video card. A video card (video adapter) is an electronic board that processes video data and controls the operation of the display.

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Graphic resolution Color quality Screen size Image refresh rate Protection class

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The image on the screen consists of small dots – pixels (picture’s element). The more dots on the screen, the smaller the size of each dot, and therefore the higher the resolution and clarity of the image. M – number of horizontal dots N – number of vertical dots M x N – graphic resolution 640 x 480 800 x 600 1024 x 768 1280 x 1024, etc.

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Measured between opposite corners of the monitor screen diagonally. Expressed in inches (1’’=2.54 cm). There are the following monitor sizes: 14 ''; 15 ''; 17''; 19 ''; 20 ''; 21 '' Shows how many times within a second the monitor can completely change the image. Measured in Hertz (Hz). Minimum acceptable value 75 Hz Normal value 85 Hz Comfort value 100 Hz

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Matrix Inkjet Laser Printer – a device for printing numerical, text and graphic information on paper. PRINTER TYPES:

Slide 9

Impact operating principle. The image on paper is formed from impressions formed by striking small rods (9 or 24) through an ink ribbon. The print head moves along the paper, leaving a line of characters. Resolution 150 dpi. Advantages Disadvantages Cheap consumables Poor print quality Document difficult to forge (receipts) Noise Low speed

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An ink print head is used. Microdroplets of ink are ejected onto the paper under pressure generated by vaporization. Two cartridges are used: black and color (cyan + magenta + yellow). Resolution – 300-700 dpi.

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Advantages Disadvantages Simplicity Cost Supplies exceeds the cost of the printer. Reliability Low printer cost Average print speed (several pages per minute) Low noise level

Slide 14

Page printing. High speed (up to 20 pages per minute). Typographic print quality (600-1200 dpi).

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They work in much the same way as photocopiers. Page information is projected using a laser beam onto a rotating drum with a light-sensitive coating that changes electrical properties depending on the degree of illumination. After illumination, a coloring toner powder is applied to the energized drum, the particles of which adhere to the illuminated areas of the drum surface. The printer uses a hot roller to pull the paper under the drum, the toner is transferred to the paper and fused into it, leaving a permanent image.

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Draws graphs, drawings, diagrams, drawings under computer control. Draws an image using a pen. Roller plotters scroll the paper under the pen, while flatbed plotters move the pen across the entire surface of horizontally lying paper. To work you need a driver program. There are also inkjet plotters.

Slide 17

Used for audio output and connected to the sound card output. Sound card (audio adapter) is a special electronic board that allows you to record sound, play it back and create software using a microphone, headphones, speaker, built-in synthesizer. The audio adapter works both for sound recording and playback.

18 slide

Keyboard Manipulators (mouse, trackball, touchpad, joystick) Scanner Digital video cameras and cameras Light pen Graphics tablet Microphone, speech recognition device

Slide 19

A standard input device for numeric and text information, as well as control commands. The necessary software to get the keyboard working is already in the ROM. The keyboard does not need support from special system programs.

20 slide

Function keys F1-F12 Alphanumeric keys Additional numeric keypad Service keys Modern standard keyboard has more than 100 keys.

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Pointer type input device for control graphical interface. The resolution of the mouse determines how accurately the cursor will move across the screen (400-800 dpi for mid-range devices). A mouse sometimes requires a driver to function.

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By the method of reading information: mechanical, optical-mechanical, optical By the number of buttons: 2 and 3-button By connection method: wired and wireless

Slide 23

A trackball is a stationary analogue of a mouse, used mainly in portable personal computers.

MOUSE - - provides quick movement around the screen, entering graphic information and controlling the execution of commands using the “point-click” principle, etc.

First generation computers: MESM (1950) A control panel with a set of switches was used to enter commands and data. BESM (1952) Punched paper tape was used as input devices. “Hrazdan” (1958) Information is entered from a perforated 5-track tape (line speed is 1 second) and from 80-column punched cards (card speed is 1 minute).

Second generation of computers: M-20 (1959) Information is entered into the machine from punched cards at a speed of 100 cards per minute. Cards are fed on the wide side with mechanical reading of the punches. WORLD (1965) The machine is equipped with input/output devices on magnetic cards and punched tape, as well as an electrified typewriter. NAIRI (1967) Input/output from punched cards, punched tape, as well as alphanumeric printing on an electric typewriter “Consul”. RUTA-110 (1969) Input/output: punched card device (reading speed 350 punched cards per minute); an input and output device for information on a 5- or 7-track punched tape, which includes a photo reader and a tape punch (reading speed 1000 characters per second, perforation speed - 80 characters per second).

Third generation of computers: BESM-6, ES-EVM (1020, 1030) (g.) Input/output from punched cards, punched paper and magnetic tape, alphanumeric printing on an electric typewriter “Consul”.

Fourth generation of computers: 1983 Apple Computer built Personal Computer Apple is the first computer controlled by a mouse. In the same year, the mass use of floppy disks (floppy disks) began as standard storage media. The creator, Steve Wozniak, provided for the use in his design of devices without which a computer is unthinkable today - a keyboard and a video terminal. But the users of microcomputers at that time made do with toggle switches on the front panel.

Buylova Ekaterina

The computer exchanges information with the outside world using peripheral devices . Only thanks to peripheral devices can a person interact with the computer, as well as with all the devices connected to it. Any connected peripheral device at any given time can be either busy performing the work assigned to it or waiting for a new task. The influence of the speed of peripheral devices on the efficiency of working with a computer is no less than the speed of its operation. central processor. Operation speed external devices does not depend on processor speed.

Input Devices convert information into a machine-readable form, after which the computer can process and remember it.

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Slide captions:

Information input devices Prepared by Ekaterina Builova, a student of VI “B” class

Devices for inputting information into a computer A computer, like a person, needs its own “eyes and ears” with the help of which it could perceive information from the outside. Currently, there are various devices that perform these functions as part of a computer. They are called input devices because they provide input into the computer of data in various forms: numbers, texts, images, sounds. Input devices convert this information from a human-readable form into a computer-readable digital form. Modern computers can process numerical, text, graphic, sound and video information.

Keyboard Microphone Scanner Webcam Touch screen Graphics tablet Mouse Trackball Joystick Touchpad Light pen

A keyboard is a computer device that is located in front of the display screen and is used for typing text and controlling the computer using the keys on the keyboard. The keyboard allows you to enter numeric and text information, as well as various commands and data, into the computer. Back

The microphone is used to input audio information and is connected to the input sound card. Back

A scanner is a device for converting graphic information into digital information. The scanner is used for optical input into a computer and converting images (photos, drawings, drawings) into computer form. Back

Webcam is a small-sized digital video or photo camera capable of recording video images in real time intended for further transmission via computer network. Digital cameras allow you to receive video images and photographs directly in digital (computer) format. Allows graphical information to be entered into the computer. Back

A touch screen is an information input device, which is a screen that responds to touches. Back

Graphics tablet (digitizer). A graphics tablet (with a light pen) is a device for entering hand drawings and handwritten text directly into a computer. A graphics tablet consists of a pen and a flat tablet that is pressure sensitive or proximity sensitive to the pen. A digitizer is another graphic input device. Back

Mouse. As you move it across the mat, the mouse pointer moves on the screen, allowing you to point at and/or select objects. Back

Trackball. Based on the principle of operation, a Trackball can best be compared to a mouse that lies “belly” up on the table. Back

Joystick is a control device in computer games. It is a lever on a stand that can be tilted in two planes. The joystick is included in the necessary gaming set for the computer; it is also used in various programs simulators and training simulators (along with virtual helmets, rudders, etc.). Back

A touchpad is an information input device, which is a screen that responds to touches. The touchpad is used to move the cursor depending on the movements of the user's finger and is used to replace the mouse in laptops. To move the cursor to the entire screen, just move your finger across the touchpad surface. Back

A light pen has the appearance of a ballpoint pen or pencil connected by a wire to one of the computer’s I/O ports. Typically, a light pen has one or more buttons that can be pressed by the hand holding the pen. Inputting data using a light pen involves touching or drawing lines with the pen on the surface of the monitor screen. Back

Thank you for your attention!