Computer Hardware Input And Output Devices Pdf

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Paul's passion for technology and digital media goes back over 30 years. Born in the UK, he now lives in the US.

Keyboard is the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions.

Computer Basics: What Is an Output Device? 10 Examples

Paul's passion for technology and digital media goes back over 30 years. Born in the UK, he now lives in the US. Read on for 10 examples and the definition of an "output device. An output device is a piece of computer hardware that receives data from a computer and then translates that data into another form. That form may be audio, visual, textual, or hard copy such as a printed document.

The key distinction between an input device and an output device is that an input device sends data to the computer, whereas an output device receives data from the computer. For example, using a microphone to record a podcast is an example of using an input device.

Listening to the recorded podcast through a connected speaker is an example of using an output device. Both output and input devices are examples of auxiliary or peripheral devices.

There are four different categories of output device: visual, data, print, and sound. Each output device example has a specific history, so here I cover specifically how each device works, when it became a part of technology history, popular brands on the market selling the device, and a fun fact.

For more information about input devices, check out my article " Computer Basics: 10 Examples of Input Devices. Function: A monitor consists of a screen, circuitry, a power supply, buttons to adjust screen settings, and a casing that contains all of these components.

A monitor displays data from a computer onto a screen so the user can interact with the data via a digital interface. Origin Story: The first monitors used the same technology as early televisions, relying on a cathode ray tube and a fluorescent screen. This technology was first utilized for computer monitors in in the Uniscope machine , which had a built-in CRT display. CRT display lights up a series of dots with a beam on an active part of the screen.

This resulted in a maximum resolution of by pixels. Nowadays, monitors incorporate flat display technology. Plasma monitors are brighter than both CRT and LCD and function by illuminating tiny charged gas bubbles, or plasma, in the screen. A computer sends data to a printer, which is then output by printing data onto paper or into a 3-dimensional item.

Function: The function of a printer is to create a copy of whatever is sent from the computer to the printer. Printers take electronic data sent from a computer and generate a hard copy. Origin Story: Photocopying, also known as xerography, is the origin-technology of modern-day printing and was invented in by Chester S. Carlson of Queens, New York. The first inkjet printer was developed in There are many different types of printers, with inkjet and laser printers being two of the most common.

Fun Fact: A plotter, which is also a type of print output device, is a similar type of hardware device to a printer. Unlike a printer, however, plotters use writing tools, such as pen, pencil, marker, to draw lines. Designed to use vector graphics, plotters were once commonly employed for computer-aided design, but have now been largely replaced by wide-format printers. Function: Headphones output audio from a computer through two individual headphones for a single listener. Also known as earphones, headphones allow you to listen to audio without disrupting other people in the vicinity.

Nathaniel Baldwin of Utah submitted a headphone prototype to the U. Navy in , which was adopted some years after by Naval radio operators. Koss Corporation then created the first commercial stereo headphones in Nowadays, headphones come in all shapes and sizes, from basic earbuds to the traditional style with padding around the earpieces and a connecting band that fits over the user's head.

Fun Fact: Headphones were popularized for mainstream use in by Sony Walkman. Speakers receive vibrational cues from a computer and elicit sound.

Function: Computer speakers are hardware devices that transform the signal from the computer's sound card into audio. Speakers create sound using internal amplifiers that vibrate at different frequencies according to data from the computer. This produces sound.

Origin Story: Speakers are essential if you want a louder sound, surround sound, fuller bass, or just higher quality audio. The first internal computer speaker a speaker inside the chassis of a laptop was created in by IBM. External computer speakers began to appear in stores in the early s when computer gaming, digital music, and other forms of media became popular. Some computer speakers are wireless nowadays, connecting to the computer via Bluetooth. Fun Fact: You can turn your speakers or headphones!

The difference between computer speakers and a microphone is that the frequency of the vibration originates from external sounds rather than data from a computer. Function: As its name suggests, this output device "projects" computer images or video onto a wall or screen. Projectors were first created and used in late 19th-century France.

Throughout history, biunial lanterns were used to project ink on glass by photographers, lecturers, and magicians. A biunial lantern is a lantern with projection capabilities.

Turning the knob allowed teachers to stop on specific slides. The data projector was invented in Using a single cathode ray tube CRT , the first data projector projected only monochromatically.

Nowadays, projectors are typically used for presentations, watching movies, or as a teaching aid, as they enable an entire roomful of people to see images generated by a single computer. Fun Fact: 3D projectors are designed to project two images of the same thing from different angles at the same time. Wearing 3D glasses, the viewer can see a 3D projection composed of multiple superimposed images.

The sender broadcasts signals to 24 satellites that ping to the sender the exact location of the sender computer in the form of latitude and longitude coordinates. The Department of Defense deployed more satellites to bolster the burgeoning navigation system. By , 24 satellites were in orbit and GPS was used broadly across the world in agriculture, aviation, the military, athletics, science, and the list goes on. A computer sends data to the sound card, which then translates the data into vibrational patterns.

These patterns are output by speakers as sound. Function: The sound card controls the output of sound signals, enabling devices like speakers and headphones to work. The sound card is known as an expansion card, which means it can be added to the motherboard. Although a sound card is not essential to a computer's basic functionality, you need one if you wish to play games, watch movies, listen to music, and use audio and video conferencing. PLATO was the first computer-assisted learning system in widespread use.

It wasn't until that sound cards were widely used in PCs. When computer data is sent through a sound card, it is sent to the card digitally. The sound card then translates the digital information in the form of binary, or 0s and 1s into analog information: vibrations, output in the form of sound. Fun Fact: The popularization of sound cards originated in the gaming realm.

Sierra Entertainment, a gaming platform, began supporting add-ons like sound cards and this enabled the sound card industry to grow without being an underground solution to a growing issue: shallow sound while gaming. A video card can greatly improve a computer user's gaming experience.

Function: As with the sound card, the video card is an expansion card that slots into the motherboard. The video card processes images and video, enabling visuals to be seen on a display. Most computers have basic video and graphics capabilities built into the computer's motherboard, but for faster, more detailed graphics, a video card is required.

The MDA supported visuals such as text and lines for uses such as drafting but didn't offer any graphical experiences. In order to increase the functionality of the burgeoning computing technology, Hercules Computer Technology invented the Hercules Graphics Card, which integrated with the MDA to offer a bitmapped or "rasterized," or pixelated , graphics experience.

From the s on, graphics technology was increasingly like modern-day graphics cards and has increased in graphic quality and speed significantly since then. Fun Fact: Video cards can work in both 2D images and 3D images.

Images like browsers, computer desktops, and PDFs are considered 2D images, whereas computer games are considered 3D. A braille reader uses the kinetic nature of the piezoelectric-driven keyboard to send braille letters in the form of raised bumps to the user. Function: A braille reader is a peripheral device that enables a blind person to read text displayed on a computer monitor.

The text is sent by the computer to the device, where it is translated into a braille format and made readable by pushing rounded pins up through a flat surface. Braille readers are also called braille displays and come in various sizes. Braille readers come in the form of separate devices from a keyboard or as part of a keyboard. Most use piezoelectric technology, or electricity generated by mechanical stress, to create a single line of text at a time in the form of raised bumps. This was the case until late when Blitlab proposed an electronic solution to the limited capabilities of braille readers.

Blitlab, upon its release, will allow the visually impaired to use the internet and read books and newspapers more independently. The technology is still in development. Origin Story: Braille is a 63 character alphabet invented in by Louis Braille. Braille was embossed on paper and other materials for decades before braille reader technology was invented.

Fun Fact : Blitlab is the first tablet-style braille reader technology that will utilize a perforated glass screen that raises bumps as the computer reads the text from websites and translates it to braille. Function: SGDs, also known as voice output communication aids, generate text to speech. A user types something and when the command is sent, the SGD reads the sentence out loud.

In the s Dynavox was formed by students from Carnegie Mellon University with the goal to make an effective SGD for a young woman with cerebral palsy.

This resulted in the invention of the EyeTyper, a device that allowed the user to spell with their eyes that would then be spoken. This often includes the ability to speak. The variety and complexity of output devices evolve with technology. Conceptually output devices have existed for decades.

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A peripheral device is generally defined as any auxiliary device such as a computer mouse or keyboard, that connects to and works with the computer in some way. RAM—random access memory—straddles the line between peripheral and primary component; it is technically a storage peripheral, but is required for every major function of a modern computer and removing the RAM will effectively disable any modern machine. Many new devices such as digital watches, smartphones and tablet computers have interfaces which allow them to be used as a peripheral by a full computer, though they are not host-dependent as other peripheral devices are. According to the most technical definition, the only pieces of a computer not considered to be peripherals are the central processing unit, power supply, motherboard, and computer case. Usually, the word peripheral is used to refer to a device external to the computer case, like a scanner, but the devices located inside the computer case are also technically peripherals.

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Lesson 5: Input and Output

In computing , an input device is a piece of equipment used to provide data and control signals to an information processing system such as a computer or information appliance. Examples of input devices include keyboards , mouse , scanners , cameras , joysticks, and microphones. A 'keyboard' is a human interface device which is represented as a layout of buttons. Each button, or key, can be used to either input a linguistic character to a computer, or to call upon a particular function of the computer.

An input device sends information to a computer system for processing , and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device. Most devices are only input devices or output devices, as they can only accept data input from a user or output data generated by a computer. For example, as shown in the top half of the image, a keyboard sends electrical signals, which are received as input.

Chapter 9: Input-Output Devices

In this lesson students consider a number of computing devices to determine what types of inputs and outputs they use. Groups are assigned to a computing device and based on a teacher-provided definition of input and output, list the inputs and outputs of their device. Earlier in the activity students are prompted to focus on more obvious physical inputs and outputs e.

What is the difference between an input and output device?

Choose the correct option and mark your choice against the corresponding question number in the given answer sheet by darkening the corresponding circle with a lead pencil. Now they are also used with nonportable desktop computer systems because they occupy less table space. Non-impact printers.

From Hardware to Software pp Cite as. Such devices convert between the external means of recording information required by the user, such as punched holes or printed characters, and the internal means of storing information inside the computer, such as patterns of electric signals. Unable to display preview. Download preview PDF. Skip to main content. This service is more advanced with JavaScript available. Advertisement Hide.

Беккер взглянул на часы. Час сорок пять ночи. Он в недоумении посмотрел на двухцветного. - Ты сказал - в два ночи. Панк кивнул и расхохотался. - Похоже, ты облажался, приятель. - Но сейчас только без четверти.

Chapter 9: Input-Output Devices

Computer Devices

 - Он повернулся к бригаде своих помощников.  - Кто знает, какая разница между этими элементами. На лицах тех застыло недоумение. - Давайте же, ребята. -сказал Джабба.  - Вы же учились в колледжах.

Я люблю. Без воска, Дэвид. Она просияла и прижала записку к груди. Это был Дэвид, кто же. Без воска… Этот шифр она еще не разгадала. Что-то шевельнулось в углу. Сьюзан подняла .

Chapter 9: Input-Output Devices

И с ироничной усмешкой вспомнил: - Без воска.

Она знала, что есть только один способ доказать свою правоту - выяснить все самой, а если понадобится, то с помощью Джаббы. Мидж развернулась и направилась к двери. Откуда ни возьмись появился Бринкерхофф и преградил ей дорогу. - Куда держишь путь.

Если только -. - Если только компьютер понимает, взломал он шифр или. Сьюзан чуть не свалилась со стула. - Что. - Может случиться так, что компьютер, найдя нужный ключ, продолжает поиски, как бы не понимая, что нашел то, что искал.

 - Он улыбнулся.  - Но на этот раз, - он вытянул левую руку так, чтобы она попала в камеру, и показал золотой ободок на безымянном пальце, - на этот раз у меня есть кольцо. ГЛАВА 116 - Читайте, мистер Беккер! - скомандовал Фонтейн. Джабба сидел весь потный, положив руки на клавиатуру. - Да, да, - сказал он, - читайте эту благословенную надпись.

На стене ожила связанная с компьютером диаграмма. Сьюзан рассеянно подняла на нее глаза, безучастная к царившему вокруг нее безумию.

Когда он влетел во вращающуюся дверь, прозвучал еще один выстрел. Стеклянная панель обдала его дождем осколков. Дверь повернулась и мгновение спустя выкинула его на асфальт. Беккер увидел ждущее такси.

Он постоял в нерешительности, раздумывая, не следует ли поставить в известность начальника лаборатории безопасности. Да будь они прокляты, эти криптографы. Ничего не понимают в системах безопасности.

 Если честно - да, - Не надо так, Сью, Ты меня оскорбляешь. Глаза Сьюзан сузились. Она терпеть не могла, когда он называл ее Сью. Вообще-то она ничего не имела против этого имени, но Хейл был единственным, кто его использовал, и это было ей неприятно. - Почему бы мне не помочь тебе? - предложил Хейл.

Computer input and output devices

Однако номер пока не удалось узнать.

1 Response
  1. Yvette E.

    Input and output devices allow the computer system to interact with the outside world by moving data into and out of the system.

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