Introduction to Computer Input Devices An input device is essentially computer hardware that transmits data to a computer.
Most input devices interact or manage the computer somehow. The most widely used input tools are the mouse and the keyboards, but many more.
The main difference is that the former sends data to the computer while the latter extracts data from the computer. Often peripheral or auxiliary devices are referred to as input and output devices with additional characteristics. List of Computer Input Devices Now we are going to see some Computer input devices which are given as follows Start Your Free Software Development Course Web development, programming languages, Software testing & others 1.
Touchpad A touchpad is a common replacement for a computer mouse, also known as the trackpad. This is primarily a complex surface that can sense the motion of the input devices of a user and use it to operate the device. Touches for laptops were first introduced in the 1990s and a laptop without one is now rare. 2. Digital Camera The collection of images and videos is performed separately using digital cameras.
Later on, the video files and photos can be transferred to the computer input devices connecting with the camera to the cable directly and removing the memory card and placing it on the computer. The pictures may be edited, saved, emailed, or printed once they are on the computer.
3. Graphic Tablet Graphical tablets are also called digitizers, which are input tools used for hand-drawn image conversion. With a stylus, the user draws on a particularly flat surface like a piece of paper. The drawing can be edited, saved, or displayed on the computer screen.
Although scanners can produce digital images from drawings only, graphic tablets allow artists to see their drawings input devices as they make them, offering greater control and flexibility. 4. Touch Screen Rather of the mouse, many apps today use a touch screen, drag, or pick user options on the monitor.
As the name implies, a sensitive monitor reacts to the passing of fingers. Mobile devices are especially popular with touch screens such as laptops, palmtops, tablets, or smartphones. 5. Microphone A mic is captured and sent to a device to input devices digital format. A microphone records audio. The audio can be played, copied, edited, uploaded, and e-mailed after the digitalization.
Microphones can also be used as part of a video chat or audio stream to record audio or to transmit sounds live. 6. Scanner In the computing world, the term “scanner,” but here I am using this to refer to a desktop image input devices, can be used in a variety of ways. In general, a scanner is an input device used for the transmission of images (or, often, text) through a machine with a digital image transformation of the signal. You can view the digital image on an edited, recorded, emailed, monitored screen, or printed.
7. Keyboard The most common form of the input device is keyboards. In general, interaction with computers using punch cards and paper tape was performed before keyboards.
The QWERTY layout for alphabetic keys, surrounded by numbers, functions, symbols, and other key characters in most English-language keyboards. A user will insert data and instructions to the machine by pressing the corresponding keys. 8. Input devices Every user who moves the mouse on a mouse pad moves the pad in the corresponding directions on the computer’s display screen, but this mouse communicates with a device in a mechanism known as a “point and click.” The electronic mouse idea is rooted in the trackball, which was invented in 1946 using a so-called roller ball to guide a pointer.
Most contemporary computer mice have two click buttons and a wheel in the center to scroll up and down web pages. 9. Webcam Digital cameras differ in two ways from Webcams.
First, you can’t work independently of your computer, and second, you don’t have an integrated memory. Webcams are most commonly used as live streaming videos or for creating video chats, but they can capture images or videos. 10.
Joystick Joysticks are usual in computer video games for controlling characters and vehicles. A handle that rotates on the foundation and sends its angle or direction as data to the computer is essentially a joystick.
Many video game joysticks have activators, buttons and arms to be pressed in games. 11. Light Pen A light pen is a pen-like pointed device. It is used to select or draw images on a monitor screen from a displayed menu item. It consists of a photocell and a small tube optical system.
Conclusion In this article, we have seen various Computer input devices that provide control signals and data to the computer system. You can choose any of them based on your requirement.
I hope you will find this article helpful. Recommended Articles This is a guide to Computer Input Devices. Here we discuss an introduction to Computer Input Devices along with top 11 devices. You can also go through our other related articles to learn more – • Types of Computer Language • Types of Computer Architecture • Types of Computer Software • Types of Computer Hardware • All Courses • Software Development Course - All in One Bundle • Become a Python Developer • Java Course • Become a Selenium Automation Tester • Become an IoT Developer • ASP.NET Course • VB.NET Course input devices PHP Course © 2022 - EDUCBA.
In other words, the computer system reads the program and the data from the input devices. Most common input devices are the keyboard and mouse. Following are some of the important input devices which are used in a computer − • Keyboard • Mouse • Joy Stick • Light pen • Track Ball • Scanner • Graphic Tablet • Microphone • Input devices Ink Card Reader(MICR) • Optical Character Reader(OCR) • Bar Code Reader • Optical Mark Reader(OMR) Keyboard The 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 the traditional typewriter, although there are some additional keys provided for performing additional functions. Keyboards are of two sizes 84 keys or 101/102 keys, but now keyboards with 104keys or 108 keys are also available for Windows and Internet.
The keys on the keyboard are as follows − Category Keys & Description 1.Typing keys These keys include the letter keys (A-Z) and digit keys (09) which generally give the same layout as that of typewriters. 2.NumericKeypad Keyboard also contains some special purpose keys such as Enter, Shift, CapsLock, Num Lock, Spacebar, Tab, and Print Screen. Mouse The mouse is the most popular pointing device. It is a very famous cursor-control device having a small palm size box input devices a round ball at its base, which senses the movement of the mouse and sends corresponding signals to the Input devices when the mouse buttons are pressed.
Generally, it has two buttons called the left and the right button and a wheel is present between the buttons.
A mouse can be used to control the position of the cursor on the screen, but it cannot be used to enter text into the computer.
Advantages • Easy to use • Not very expensive • Moves the cursor faster than the arrow keys of the keyboard. Joystick The joystick is also a pointing device, which is used to move the cursor position on a monitor screen. It is a stick having a spherical ball at its both lower and upper ends. The lower spherical ball moves in a socket. The joystick can be moved in all four directions.
The function of the joystick is similar to that of a mouse. It is mainly used in Computer Aided Designing (CAD) and playing computer games. Light Pen Lightpen is a pointing device similar to a pen. It is used to select a displayed menu item or draw pictures on the monitor screen. It consists of a photocell and an optical system placed in a small tube. When the tip of a light pen is moved over the monitor screen and the pen button is pressed, its photocell sensing element detects the screen location and sends the corresponding signal to the CPU.
TrackBall A trackball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. This is a ball which is half inserted and by moving input devices on the ball, the pointer can be moved. Since the whole device is not moved, a trackball requires less space than a mouse. A trackball comes in various shapes like a ball, a button, or a square. Scanner The scanner is an input device, which works more like a photocopy machine. It is used when some information is available on paper and it is to be transferred to the hard disk of the computer for further manipulation.
Scanner captures images from the source which are then converted into a digital form that can be stored on the disk. These images can be edited before they are printed. Digitizer The digitizer is an input device which converts analog information into digital form. The digitizer can convert a signal from the television or camera into a series of numbers that could be stored in a computer.
They can be used by the computer to create a picture of whatever the camera had been pointed at. The digitizer is also known as Tablet or Graphics Tablet as it converts graphics and pictorial data into binary inputs. A graphics tablet as digitizer is used for fine works of drawing and image input devices applications.
Microphone The microphone is an input device to input sound that is then stored in a digital form. The microphone is used for various applications such as adding sound to a multimedia presentation or for mixing music.
Magnetic Ink Card Reader (MICR) MICR input device is generally used in banks as there are a large number of cheques to be processed every day. The bank's code number and cheque number are printed on the cheques with a special type of ink that contains particles of magnetic material that are machine readable. This reading process is called Magnetic Ink Character Recognition (MICR).
The main advantages of MICR are that it is fast and less error-prone. Optical Character Reader (OCR) OCR is an input device used to read a printed text.
OCR scans the text optically, character by character, converts them into a machine-readable code, and stores the text on the system memory. BarCode Readers BarCode Reader is a device used for reading bar input devices data (data in the form of light and dark lines). Barcoded data is generally used in labeling goods, numbering the books, input devices.
It may be a handheld scanner or may be embedded in a stationary scanner. BarCode Reader scans a barcode image, converts it into an alphanumeric value, which is then fed to the computer input devices the bar code reader is connected to. Optical Mark Reader (OMR) OMR is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked.
It is especially used for checking the answer sheets of examinations having multiple input devices questions. • Related Questions & Answers • Output Devices in Computer • Electrical Circuit Devices • Discuss the various Input-Output Instructions in Computer Architecture?
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Updated: 08/16/2021 by Computer Hope An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. The picture shows a Logitech trackball mouse, which is an example of an input device. The most commonly used or primary input devices on a computer are the keyboard input devices mouse. However, there are other devices that input data into a computer.
• Types of input devices. • What are the input devices of my computer? • What does an input device send to a computer? • Why does a computer need an input device?
• Input devices for physically challenged users. • Related input device pages. Types of input devices • Audio conversion device • Barcode reader • Biometrics (e.g., fingerprint scanner). • Business card reader • Data collection device • Digital camera and digital camcorder. • EEG (electroencephalography) • Finger (with touch screen or Windows Touch). • Gamepad, balance board, dance pad, joystick, paddle, steering wheel, pedals, and Microsoft Kinect.
• Gesture recognition • Graphics tablet • Guitar, MIDI keyboard, or other musical instrument connected to the computer. • Keyboard input devices Light gun • Light pen • Magnetic ink (like the ink found on checks).
• Magnetic stripe reader • Medical imaging devices (e.g., X-ray, CAT scan, and ultrasound images). • Microphone (using voice speech recognition or biometric verification). • MIDI keyboard • MICR • Motion-sensing mouse or game controller • Mouse, touchpad, or other pointing devices. • OMR (optical mark reader) • Paddle • Pen or stylus • Punch card reader • Remote • RFID reader • Scanner • Sensors (e.g., heat and orientation sensors). • Sonar imaging devices • Stylus (with touch screen).
• Touch-sensitive pad (like pad on early iPod) • Touch screen • Voice (using voice speech recognition or biometric verification). • Video capture device • Virtual device • VR helmet and gloves • Webcam • Yoke Tip Drives such as a CD-ROM, DVD, floppy diskette drive, and USB flash drive are also considered storage devices.
What are the input devices of my computer? Every computer comes with a keyboard and a mouse ( touchpad with laptop), which are considered input devices.
As far as other input devices, it depends on what was included with your computer and what's connected to the input devices. The best method of determining all of the input devices your computer has is to go through the list above. What does an input device send to a computer? What an input device sends (inputs) to a computer depends on the device.
Additionally, all input devices send data from the device over a cable or wireless transmission to the computer. For example, as you move a computer mouse, the data sent to the computer is the X-Y axis movements used to display the mouse cursor on the screen. You can see a live example of this on our x-axis definition.
Why does a computer need an input device? Today, input devices are important because they are what allows you to interact with and add new information to a computer. For example, if a computer had no input devices, it could run by itself but there would be no way to change its settings, fix errors, or other various user interactions.
Also, if you wanted to add new information to the computer (e.g., text, command, document, picture, etc.), you wouldn't be able to do so without an input device. Input devices for physically challenged users In addition to the list mentioned above, other specially designed input devices are designed for the physically challenged.
Below is a list of examples of these devices. • Eye-tracking - A specialized camera to track a user's eye to perform actions or move a mouse pointer. • Foot mouse - Mouse pointer controlled using pedals with your feet. • Gesture recognition - Specialized device to detect different input devices, including facial expressions, reading lips, and sign language.
• Head-mounted pointer - A pointer can be mounted to a hat or band to track and control the mouse pointer. • Joystick - A joystick next to the computer or on a wheelchair to control a mouse pointer. It's possible these joysticks could be operated using your chin, lips, or tongue for people with no head movement. • Voice recognition - Using your voice to control computer functions and typing on a computer.
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• Computer - Available Courses • Computer Useful Resources • Computer - Quick Guide • Computer - Useful Resources • Computer - Discussion • Selected Reading • UPSC IAS Exams Notes • Developer's Best Practices • Questions and Answers • Effective Resume Writing • HR Interview Questions • Computer Glossary • Who is Who Following are some of the important input devices which are used in a computer − • Keyboard • Mouse • Joy Stick • Light pen • Track Ball • Scanner • Graphic Tablet • Microphone • Magnetic Ink Card Reader(MICR) • Optical Character Reader(OCR) • Bar Code Reader • Optical Mark Reader(OMR) Keyboard 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 input devices additional keys provided for performing additional functions. Keyboards are of two sizes 84 keys or 101/102 keys, but now keyboards with 104 keys or 108 keys are also available for Windows and Internet.
The keys on the keyboard are as follows − S.No Keys & Description 1 Typing Keys These keys include the letter keys (A-Z) and digit keys (09) which generally give the same layout as that of typewriters. 2 Numeric Keypad It is used to enter the numeric data or cursor movement.
Generally, it consists of a set of 17 keys that are laid out in the same configuration used by most adding machines and calculators. 3 Function Keys The twelve function keys are present on the keyboard which are arranged in a row at the top of the keyboard. Each function key has a unique meaning and is used for some specific purpose. 4 Control keys These keys provide cursor and screen control. It includes four directional arrow keys.
Control keys also include Home, End, Insert, Delete, Page Up, Page Down, Control(Ctrl), Alternate(Alt), Escape(Esc).
5 Special Purpose Keys Keyboard also contains some special purpose keys such as Enter, Shift, Caps Lock, Num Lock, Space bar, Tab, and Print Screen. Mouse Mouse is the most popular pointing device. It is a very famous cursor-control device having a small palm size box with a round ball at its base, which senses the movement of the mouse and sends corresponding signals to the CPU when the mouse buttons are pressed.
Generally, it has two buttons called the left and the right button and a wheel is present between the buttons.
A mouse can be used to control the position of the cursor on the screen, but it cannot be used to enter text into the input devices. Advantages • Easy to use • Not very expensive • Moves the cursor faster than the arrow keys of the keyboard. Joystick Joystick is also a pointing device, which is used to move the cursor position on a monitor screen. It is a stick having a spherical ball at its both lower and upper ends. The lower spherical ball moves in a input devices. The joystick can be moved in all four directions.
The function of the joystick is similar to that of a mouse. It is mainly used in Computer Aided Designing (CAD) and playing computer games. Light Pen Light pen is a pointing device similar to a pen. It is used to select a displayed menu item or draw pictures on the monitor screen. It consists of a photocell and an optical system placed in a small tube. When the tip of a light pen is moved over the monitor screen and the pen button is pressed, its photocell sensing element detects the screen location and sends the corresponding signal to the CPU.
Track Ball Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. This is a ball which is half inserted and by moving fingers on the ball, the pointer can be moved. Since the whole device is not moved, a track ball requires less space than a mouse. A track ball comes in various shapes like a ball, a button, input devices a square.
Scanner Scanner is an input device, which works more like a photocopy machine. It is used when some information is available on paper and it is to be transferred to the hard disk of the computer for further manipulation. Scanner captures images from the source which are then converted into a digital form that can be stored on the disk.
These images can be edited before they are printed. Digitizer Digitizer is an input device which converts analog information into digital form. Digitizer can convert a signal from the television or camera into a series of numbers that could be stored in a computer.
Input devices can be used by the computer to create a picture input devices whatever the camera had been pointed at. Digitizer is also known as Tablet or Graphics Tablet as it converts graphics and pictorial data into binary inputs.
A graphic tablet as digitizer is used for fine works of drawing and image manipulation applications. Microphone Microphone is an input device to input sound that is then stored in a digital form. The microphone input devices used for various applications such as adding sound to a multimedia presentation or for mixing music.
Magnetic Ink Card Reader (MICR) MICR input device is generally used in banks as there are large number of cheques to be processed every day. The bank's code number and cheque number are printed on the cheques with a special type of ink that contains particles of magnetic material that are machine readable.
This reading process is called Magnetic Ink Character Recognition (MICR). The main advantages of MICR is that it is fast and less error prone.
Optical Character Reader (OCR) OCR is an input device used to read a printed text. OCR scans the text optically, character by character, converts them into a machine readable code, and stores the text on the system memory. Bar Code Readers Bar Code Reader is a device used for reading bar coded data (data in the form of light input devices dark lines).
Bar coded data is generally used in labelling goods, numbering the books, etc. It may be a handheld scanner or may be embedded in a stationary scanner. Bar Code Reader scans a bar code image, converts it into an alphanumeric value, which is then fed to the computer input devices the bar code reader is connected to.
Optical Mark Reader (OMR) OMR is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked. It is specially input devices for checking the answer sheets of examinations having multiple choice questions.
In the easiest terms, input devices can be defined as equipment that is used for providing data and controlling the signals to input devices information processing system.
This information processing system could be a computer or any other information application. Some common examples of input devices are cameras, mice, keyboards, microphones and joysticks.
Keeping track of all input devices can be difficult for students. This is why categorizing input devices can help. How would one even go about this task? The answer to this question is simple. Input devices techniques can be taken up to categorize input devices. Some of those categorizations can be based on: • Whether the input is discrete or continuous.
By discrete, it means that keys have to be pressed. On the other hand, an example of consciousness can be the position of the mouse. Though, one should note that the mouse digitizes into a discrete quantity.
However, it is fast enough to be considered continuous. • Modality of input. It can include audio, visual or mechanical motion. • The number of degrees of freedom that is involved.
For example, the traditional two-dimensional mouse or the three-dimensional navigators are designed for CAD applications specifically. The Different Types of Input Devices of Computer Now that we are all familiar with the input device definition, it is time to learn about some examples of input devices. In this section, we will do just that.
To help students, we have created a list of those devices. The list is mentioned below: • Keyboard The keyboard is one of the most common and popular input devices used in computers.
This device helps the user to input data to the computer. In most cases, the layout of a keyboard is similar to that input devices a traditional typewriter. However, there are some extra keys present in a keyboard that provides additional functionality features. Keyboards usually come in two sizes, including one with 84 keys and the other one with 101 or 102 keys. This is not to say that keyboards with 104 and 108 keys do not exist.
Instead, 104 and 108 keyboards are widely used for Windows and the Internet. The keys on a keyboard can also be arranged in different patterns. The types of keys that are manufactured based on that classification method are mentioned below. S.No. Keys Description 1 Typing Keys These keys include letters from A to Z and the digit keys from 1 to 9. The layout of these keyboards is similar to that of a typewriter.
2 Numeric Keys This type of keyboard is used to enter numeric data or cursor movement. Usually, this keyboard contains a set of 17 keys. These keys are laid out in the same configuration that is used by calculators and adding machines. 3 Function Keys Most keyboards have a row at the very top. This row contains twelve function keys.
Every function key has a unique role and meaning. Every key serves a specific function. 4 Control Keys Control keys provide screen and cursor control. There are also four directional arrow keys. Other keys included in this keyboard are Insert, Delete, Page Up, Page Down, Home, End, Escape, Alternate, and Control. 5 Special Purpose Keys Keyboards also have special input devices keys.
These keys are Print Screen, Tab, Space bar, Num Lock, Enter, Caps Lock, and Shift. There are different types of keyboards. These keyboards include different types of keys that are arranged in varied orientations. These keyboards are mentioned below.
• QWERTY Keyboard This is the most commonly used keyboard used in modern times. The name of this keyboard is based on the first six alphabetic keys of the keyboard. • AZERTY Keyboard Usually, the AZERTY keyboard is considered to be the standard French keyboard. This keyboard was developed in France as an alternative to the QWERTY keyboard. This keyboard is also used in other European countries.
There are also some countries that manufacture their own versions of AZERTY keyboards. This keyboard puts emphasis on accents and is also required for writing many European languages like French. • DVORAK Keyboard This is a type of keyboard layout built to increase the typing speed of an individual.
This was done to reduce the overall finger movement while typing. • Mouse A mouse is a popular pointing device. It is also classified as input devices a cursor-control device that has a small palm-size box with a round ball at its base. The ball at the base senses the movement of the mouse. It further sends a corresponding signal to the CPU whenever the buttons of the mouse are pressed. There are also two buttons on both the left and right side. There is also a wheel between the buttons.
The cursor is controlled by the mouse. However, this device cannot be used to enter text into the computer. These devices are easy to use, not very expensive to purchase and help in moving the cursor faster than the arrow keys that are present on the keyboard.
There are also different types of mouse. These types of mouse are mentioned below. • Trackball Mouse In these types of mice, there is a ball mechanism that is used for moving the pointer or cursor.
The ball is half inserted in the device and can also be rolled with a thumb, finger or palm. There is also a sensor that helps in detecting the rotation of the ball. This is an ideal device for people who have limited desk space. • Mechanical Mouse A mechanical mouse has a system of a ball along with several rollers.
This is done to track its movement. This mouse has a cord and is mainly used for high performance. However, there is also a drawback as dust tends to get into the mechanics. This is why regular cleaning is required. • Optical Mouse An optical mouse uses optical electronics. This is done to track the movement and is also more reliable than a mechanical mouse. It also requires less maintenance.
However, the performance of this mouse is affected by the surface on which the mouse is used. For best results, a plain and non-glossy mouse mat should be used for this mouse.
• Wireless or Cordless Mouse As the name suggests, a wireless mouse does not have a cable, and it uses wireless technology, like radio (Bluetooth or Wi-Fi) or IrDA (Infrared). This is done to control the movement of the cursor. This enhances the experience of using the mouse. Also, batteries are used for the power supply. • Joystick A joystick is also a pointing device that is used for moving the cursor position on a monitor screen. There is a spherical ball at the upper and lower ends of the stick.
These balls are attached to a socket. It is usually used in Computer-Aided Designing (CAD) and playing computer input devices. • Light Pen This is a device similar to a pen. A light pen is used for selecting a displayed menu item or for drawing pictures on the monitor screen. There are a photocell and an optical system present within a small tube. The tip of a light pen is moved over a monitor screen.
The pen button is also pressed, and the input devices sensing element detects the screen location. This sends the signal to the CPU. • Trackball The trackball is an input device used specifically in laptop and notebook computers. There is a ball that is half inserted. The pointer can be moved by moving fingers on the ball. This type of mouse requires less space and also comes in a number of different shapes, including a square and a button. • Scanner The scanner works just like a photocopy machine.
This device is used in cases when information is available on paper and has to be transferred to the hard disk of the computer. Images that are captured from a scanner can be stored in a digital format on the disk. There are also different types of scanners. Those types of scanners are: • Flatbed Scanner: It comes with a glass pane and has a input devices optical CCD or CIS array. A transparency adapter is also required for scanning transparent slides • Handheld Scanner: This is a small manual scanning device that can be held by hand.
This device is rolled over a flat image that needs to be scanned • Sheetfed Scanner: In this scanner, the document is inserted inside a slot that is provided in the scanner.
There is also a sheet-feeder, scanning module and calibration sheet included in this input devices of scanner.
• Drum Scanner: This scanner has a photomultiplier tube or PMT. The PMT scans the images and is also extremely sensitive to light. • Photo Scanner As the name indicates, a photo scanner is used for scanning photographs. This device uses high resolution and colour depth, which are required for scanning photographs. • Digitizer A digitizer is an input device that converts analogue information into a digital form. Digitizers can be used for converting signals from cameras and televisions into a series of numbers.
This information can be stored on a computer. Digitizers are also known as graphic tablets or simply tablets. A graphic tablet can be used for drawing fine works of art and image manipulation applications.
• Microphone This is an input sound device that stores audio information in a digital form. Microphones can input devices used for adding sound to multimedia files and presentations. There are different types of microphones including dynamic microphones, condenser and ribbon microphones.
• Magnetic Ink Card Readers (MICR) MICR is an input device that is mainly used in banks or other organizations where a large number of checks are processed every single day. The benefit of using this device is that it is very fast and causes a few errors. • Optical Character Readers (OCR) OCR or Optical Character Reader is an input device that is used for reading printed text. This device optically scans the text, character by character.
After that, the information is converted into a readable code that can be read by the machine. The information can input devices be stored on the system. • Digital Camera A digital camera is a digital device that captures images and can also be used for recording videos digitally.
These devices store the images and videos on a memory card. There is also an image sensor chip in cameras. This chip is used for capturing images. This is different from the film that was used by traditional cameras. Apart from that, a simple camera that is connected to a computer can also be known as a digital camera.
There are photosensors for recording light. Light enters the input devices through the lens. After the light strikes the photosensors, each of the sensors simply returns the electrical current. This is used for creating the final image. • Paddle The paddle is a simple input device that is used in games. This device can be viewed as a wheel that can be held by hand. It looks like a volume knob on a stereo and can be used for increasing or decreasing the volume. A paddle can be used for controlling cursors or any other objects in the game in a back-and-forth motion.
Paddles are used as an alternative to the joystick. Apart from that, the term paddle can also refer to other handheld devices which were designed to function in an electronic device or computer.
• Steering Wheel As you might have guessed, a steering wheel is usually used as an input device in racing video games. This input device can also be used in virtual simulators that people can use for learning how to drive.
This input device works just like a real steering wheel as it allows the user to either turn right or left. A steering wheel can also be provided with the brake pedal and acceleration devices. A mechanism for shifting gears can also be used. This input device helps in making racing games more entertaining and adventurous.
• Gesture Recognition Devices Gesture recognition devices take human gestures as input. There are many other devices that respond to human gestures. For example, Kinect is a device that works by observing the movement of a playerâ€™s body. Input devices device interprets those movements and uses those movements in the video game.
There are also other devices like smartphones and tablets that allow users to perform similar tasks. Some tasks that can be performed by this device are finger gestures like pinching and swiping.
• Light Gun Light gun is a pointing input device. This device is designed to point at and shoot at targets on the screen in an arcade or a video game.
A light gun was also used for the first time on the MIT Whirlwind computer. The device works by pointing it at a target on the screen. After that, the trigger can be pulled, and the screen would go blank for a fraction of a second. During this second, the photodiode, which is present in the barrel, determines where the gun is pointed. For example, ducks can be shot in a duck hunting game with this device. • Touchpad Touchpads are usually found in input devices.
This device is often considered to be a substitution for the mouse. There are two buttons on both the left and right side of the touchpad. A touchpad can be used for selecting an object on the screen, delete, copy, paste, open a folder or file and other tasks.
• Remote Remote can be defined as a hardware device designed to control the functioning of a device. For example, a TV remote can be used for changing the channels, increasing or decreasing input devices volume, and performing other tasks from a distance without moving in any direction.
According to experts, the first cordless TV remote was developed by Dr Rober Adler of Zenith. This was done in 1956. The remote sends across electromagnetic waves to communicate with the device. These waves can be radio waves, infrared rays or other waves. • Touch Screen As the term indicates, a touch screen or display screen is a device like a tablet or a smartphone.
This device allows users to directly interact or provide inputs to the device by using a finger. In this day and age, most of the electronic devices come equipped with a touch screen. This is often an alternative to a mouse for navigating a graphical user interface. For example, one can unlock phones, open emails, open files, play video and perform other tasks by just a single touch.
There are also other devices like car GPS, camera and fitness machines. According to the official record, the concept of touch screens were first introduced and published by E. A. Johnson. This was done in 1965. Eventually, the first touch screen was developed during the beginning of the 1970s.
This was done by Bent Stumpe and Frank Beck, who were CERN engineers. • Virtual Reality (VR) Virtual Reality or VR is an artificial or virtual environment generated by computers. An individual can interact with virtual objects of input devices artificial environment. This is done by using some input devices like gloves, headsets and headphones.
For example, if you have the right virtual reality equipment, you can walk on a beach, watch a football match, walk in the sky or be on a rollercoaster without even input devices your bed. • Webcam In the simplest terms, a webcam is any camera that is connected to a computer. There are some computers that have built-in cameras. Those cameras are also known as webcams. These input devices can take pictures and videos. These pictures and videos are stored in computer memory.
These can be displayed on the screen whenever required. Webcams work in a similar manner as digital cameras.
Images that are taken through a webcam can also be shared with others through the internet. • Biometric Devices Biometric can be defined as a process through which an individual is identified by using his or her biological features. Biological features that can be used include eye cornea, fingerprints, and face structure. Different biometric devices use various scanning features and abilities. Some of those biometric devices are: • Face Scanner A face scanner helps in identifying a person by scanning his or her entire face.
These scanners work by taking the measurements of the personâ€™s face. For example, the distance between the eyes, mouth and nose can be calculated. Face input devices are also smart enough to differentiate between the personâ€™s real face and the face on a picture. • Hand Scanner Hand scanners use the hand of an individual to verify his or her identity. These scanners work efficiently as every individual has a unique pattern of veins in the palm.
This is similar to fingerprints. These scanners input devices infrared light to scan the pattern of veins and blood flowing in the hands of the individual.
Also, one must note that palms are more unique than fingerprints. • Fingerprint Scanner As the name indicates, fingerprint scanners identify people for biometric authentication through fingerprints. This device was developed by keeping in mind that no two people have the same fingerprints around the world. Companies also use fingerprint sensors as attendance systems to mark the attendance of employees. These scanners input devices the pattern of ridges and valleys that are found on a finger. This information is also stored in the memory or database of the scanner.
• Iris or Retina Scanner Retina or iris scanners scan the eye of an individual to confirm the identity of a person. This device is usually more secure than other scanners as it is next to impossible to copy the iris or retina.
This device works by mapping the blood vessel patterns present in the retina of the eye. This works because the blood vessels of the retina absorb light with more ease. • Voice Scanner Voice scanners work by input devices the voice of an individual and digitizing that information to come up with a distinctive voice template or print.
These voiceprints are stored in a database. This information can be used later to verify the voice of an individual and confirm his or her identity. However, these scanners are not that reliable as the individual must speak in the same tone or voice that was used to create the first voice template.
• Stylus A stylus is a pen-shaped input device used for writing or drawing on the screen of a graphic tablet or device. Earlier, these devices were specifically used for just PDAs and graphic tablets. However, now these devices input devices become popular for use on mobile devices as they act as a replacement for the fingers of the user.
These devices provide better and more accurate navigation. Input devices also keeps the oils secreted by human fingertips away from the input devices of the device. Input devices are equipment that helps in providing data and controlling signals to an information processing system, like a computer.
This is a very important chapter for students as it helps them to get knowledge about the computer input devices and complete function of all the devices. Candidates can study the notes provided by Vedantu as it covers all the important input devices and you don't need to search for other extra study material. Â In today's time coding for kids is most important as it allows them to expand their vision and work harder.
The basics of coding include computer usage and input devices which have different functions and usage.
Students should have a good device as they are the main source which helps us to give input commands to the computer to process it further.
A few examples of input devices that are commonly used are: • Keyboard- the most common input device that is used is the keyboard it helps to enter data into the computer. The keyboard looks similar to a typewriter but it has some additional keys that provide advanced functioning of the computer. • Mouse- a very important and most common input device is a mouse. Mousse is a pointing device that is a small palm-size device that has a spherical ball at the bottom that helps it to move and detect the direction of movement and inputs similar to the input devices cursor.
Also the two buttons on the top of the mouse inputs command to the CPU when they are pressed. The mouse controls the cursor on the screen and the left and right button inputs commands to the system, but a mouse cannot help in entering data into the system.
• Light pen- it is a pointing input device that can be used to select items on-screen or draw on the monitor screen. In the input devices pen, an optical system is attached to the tiny tube that enables it to give commands to the system. The light pen can be used by moving it on the screen by pressing the button that gives signals to the CPU to do a particular command.
• Touchpad - it is another input device that is used to give input to the computers. The touchpad senses the touch and enables the worker to input the commands with just a touch. • Remote - remote is another device that has different functions it allows the person to press a button and give the command to the system. Each button on the remote has a different function. • Digital camera- with the improving technology digital camera is the device that allows the person to enable the video chat or it allows the system to take pictures wherever needed.
with the improving technologies there is a need to provide knowledge to our children about the techniques and systems that input devices help them to grow and it will make their thinking broader. Coding is an essential subject for kids nowadays, it provided complete Knowledge about various topics like • What is Coding?
• Python For Kids • Parts of a Computer • What are Loops? • Python Games • Coding Apps for Kids • Coding Games for Input devices • What is programming? • Kids Coding Languages • What is a Computer?
• Block Coding For Kids All these topics are explained by Vedantu and the professional team of Vedantu has expert teachers that guide the students to know more about computers input devices and coding, which will help them to grow. To prepare this chapter students need to study about what are the input devices and the various types of input devices and their functioning.
People from all around the world find this subject very important as in today's time computer knowledge is a must for any type of job. In this way, students should have a great command of this subject. Â To get ready for different types of questions asked in the examination students need to prepare with the extra study material that includes the notes prepared by experts and the important questions that provide you with good knowledge about the syllabus.
Students will get confidence before appearing in examination by solving sample question papers which will improve their speed to solve questions and give them an idea about the pattern of the question paper.
Â To prepare chapter computer input devices students should have good knowledge about all the input devices and their function. This will give them good command on this chapter. Also they need to know the important key points that input devices given at the end of the chapter.Â computer input devices is one of the important chapters that provide students complete knowledge about the working of computers and the uses of various input devices.
To get a complete understanding of this chapter students can refer to the extra study material prepared by Vedanuâ€™s experts. The study material for computer input devices provides detailed knowledge about the topics in simple language that helps students to do self-study. Also, students can access the live classes taken by Vedantu to help them in learning better and clear their doubts.
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input devices combined usage of both input and output devices.
Using an input device we input devices give instructions to the computer to perform an action and the device reverts to our action through an output device.Â In this article, we shall discuss the various input and output devices which can be connected to a computer, along with their functions.
Also, some sample questions based on this topic have been given further below in this article.Â This topic is not just important to have a basic awareness of how a computer device works but is also equally important for competitive exam aspirants.
This is because Computer Knowledge is a part of the syllabus for major Government exams conducted in the country.Â Looking for more study material related to Computer Awareness?? Refer to the links below and update yourself with the important terms and applications related to Computer: • 10 Important Computer-related Terms • Computer Virus • Computer Networks • Types of Computer • Internet • Microsoft Windows Let us first discuss the exact definition of an input and output device: Input Device Definition: A piece of equipment/hardware which helps us enter data into a computer is called an input device.
For example keyboard, mouse, etc.Â Output Device Definition: A input devices of equipment/hardware which gives out the result of the entered input, once it is processed (i.e. converts data from machine language to a human-understandable language), is called an output device. For example printer, monitor, etc.Â Other Related Links MS Office Computer Abbreviations High Level Computer Language Computer Shortcut Keys Basics of Cloud Computing Web Browsers List of Input and Output Devices PDF:- Download PDF Here List of Input Devices Given below is the list of the most common input devices along with brief information about each of them.
• Keyboard • A simple device comprising keys and each key denotes either an alphabet, number or number commands which can be given to a computer for various actions to be performed • It has a modified version of typewriter keys • The keyboard is an essential input device and computer and laptops both use keyboards to give commands to the computer • Mouse • It is also known as a pointing device • Using mouse we can directly click on the various icons present on the system and open up various files and programs • A mouse comprises 3 buttons on the top and one trackball at the bottom which helps in selecting and moving the mouse around, respectively • In case of laptops, the touchpad is given as a replacement of the mouse which helps in the movement of the mouse pointer • Joy Stick • It is a device which comprises a stick which is attached at an angle to the base so that it can be moved and controlled • Mostly used to control the movement in video games • Apart from a computer system, a joystick is also used in the cockpit of an aeroplane, wheelchairs, cranes, trucks, etc.
to operate them well • Light Pen • It is a wand-like looking device which can directly be moved over the deviceâ€™s screen • It is light-sensitive • Used in conjunction with computerâ€™s cathode ray tube • Microphone • Using a microphone, sound can be stored in a device in its digital form • It converts sound into an electrical signal • To record or reproduce a sound created using a microphone, it needs to be connected with an amplifier • Scanner • This device can scan images or text and convert it into a digital signal • When we place any piece of a document on a scanner, it converts it into a digital signal and displays it on the computer screen • Barcode Reader • It is a kind of an optical scanner • It can read bar codes • A source of light is passed through a bar code, and its aspects and details are displayed on the screen All the devices mentioned above are the most commonly used input devices.
Several other such types of equipment are used in different fields which can be counted as an input device. For the reference of candidates and to help them with the common computer-related terms, given below are links to difference between articles which will make these terms easily understandable: • Difference Between Search Engine and Web Browser • Difference Between RAM and ROM • Difference Between Hardware and Software • Difference Between IPV4 and IPV 6 • Difference Between Firewall and Antivirus • Difference Between WWW and Internet • Difference Between Virus and Input devices List of Output Device The commonly used output devices have been listed below with a brief summary of what their function is and how they can be used.
• Monitor • The device which displays all the input devices, text, images, etc. over a screen is called the Monitor • When we ask the computer to perform an action, the result of that action is displayed on the monitor • Various types of monitors have also been developed over the years • Printer • A device which makes a copy of the pictorial or textual content, usually over a paper is called a printer • For example, an author types the entire book on his/her computer and later gets a print out of it, which is in the form of paper and is later published • Multiple types of printers are also available in the market, which can serve different purposes • Speakers • A device through which we can listen to a sound input devices an outcome of what we command a computer to do is called a speaker • Speakers are attached with a computer system and also are a hardware device which can be attached separately • With the advancement in technology, speakers are now available which are wireless and can be connected using Input devices or other applications • Projector • An optical device which presents an image or moving images onto a projection screen is called a projector • Most commonly these projectors are used in auditoriums and movie theatres for input devices display of the videos or lighting • If a projector is connected to a computer, then the image/video displayed on the screen is the same as the one displayed on the computer screen • Headphones • They perform the same function as a speaker, the only difference is the frequency of sound • Using speakers, the sound can be heard over a larger area and using headphones, the sound is only audible to the person using them • Also known as earphones or headset To learn more about the Fundamentals of Computercandidates can visit the linked article.
Related Links MS Word MS PowerPoint Hardware and Software MS Excel Input and Output Devices – Sample Questions As discussed earlier, input and output devices are an important topic for candidates preparing for Government Exams. So, input devices below are a few sample questions in the form of Multiple Choice Questions, which will help you apprehend the format in which they may be asked.Â Q 1.
The _____________ pen is an input device which is used to select and display objects on a computer screen. • Ink • Light • Magnetic • Character Reader input devices None of the above Answer: (2) Light Q 2.
The small element at the base of input devices mouse is called _________. • Roller • Ball Pin • TrackBall • RollerBall • None of the above Answer: (3) TrackBall Q 3. Which of the following is NOT an input device? • Barcode Reader • Scanner • Touchpad • Microphone • Speaker Answer: (5) Speaker Q 4. Which of the following is an example of a pointing device? • Mouse • Scanner • Printer • Barcode Reader • All of the above Answer: (1) Mouse Q 5.
What all keys can be found on a keyboard? • Alphabet keys • Numerical keys • Command keys • Start button • All of the above Answer: (5) All of the above Apart from these, to practise input devices from other subjects which are a part of the syllabus, aspirants can visit the following links: Free Online Mock Test Series with Solutions Previous Year Question Papers with Solutions Free Online Government Exam Quiz Bank PO Question Paper with Solutions List of Input and Output Devices PDF:- Download PDF Here For any further assistance regarding the upcoming competitive exams, to get the best study material and preparation tips, visit BYJUâ€™S.
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Free-Photos via Pixabay What Is an Input Device? An input device is essentially a piece of hardware that sends data to a computer. Most input devices either interact with or control the computer in some way. The most common input devices devices are the mouse and the keyboard, but there are many others.
The key distinction between an input device and an output device is that the former sends data to the computer, whereas the latter receives data from the computer. Input and output devices that provide computers with additional functionality are also called peripheral or auxiliary devices.
10 Examples of Input Devices • Keyboard • Mouse • Touchpad • Scanner • Digital Camera • Microphone • Joystick • Graphic Tablet • Touch Screen • Webcam Each device in this list is covered in more detail below.
1. Keyboard Keyboards are the most common type of input device. Before keyboards, interaction with computers was generally carried input devices using punch cards and paper tape. Most English language keyboards use the QWERTY layout for the alphabetic keys, which are surrounded by number, symbol, function, and other key types. By pressing the relevant keys, a user can feed data and instructions to the computer.
Input devices like keyboards and mice allow users to interact with their computers by selecting icons and entering text and commands. Ilya Pavlov via Unsplash 2. Mouse A mouse interacts with a computer through a process known as "point and click." Essentially, when a user moves the mouse on the mouse pad, the pointer moves in a corresponding direction on the computer's monitor screen. 3. Touchpad Also known as a trackpad, a touchpad is a common substitute for a computer mouse.
It is essentially a specialized surface that can detect the movement of a user's finger and input devices that information to direct a pointer and control a computer. Touchpads were first introduced for laptops in the 1990s, and it's now rare to find a laptop without one. 4. Scanner The word "scanner" can be used in a number of different ways in the computer world, but here I am using it to refer to a desktop image scanner.
Essentially, a scanner is an input device that uses optical technology to transfer images (or sometimes text) into a computer, where the signal is converted into a input devices image.
The digital image can then be viewed on a monitor screen, saved, edited, emailed, or printed. 5. Digital Camera Digital cameras are used to capture photographs and videos independently. 7 Best React Lightboxes to Try Out: The Ultimate List Later, these photo and video files can be transferred to a computer by connecting the camera directly with a cable, removing the memory card and slotting it into the computer, or through wireless data transfer methods such as Bluetooth.
Once the photos are on the computer, they can be saved, edited, input devices, or printed. 6. Microphone A microphone captures audio and sends it to a computer where it is converted to a digital format.
Once the audio has been digitized, it can be played back, copied, edited, uploaded, or emailed. Microphones can also be used to record audio or to relay sounds live as part of a video chat or audio stream. 7. Joystick Joysticks are commonly used to control characters and vehicles in computer video games. Essentially, a joystick is a handle that pivots on a base and sends its angle or direction to the computer as data. Many video gaming joysticks feature triggers and buttons that can be pressed to use weapons or projectiles in games.
8. Graphic Tablet Also known as digitizers, graphic tablets are input devices used for converting hand-drawn artwork into digital images.
The user draws with a stylus on a special flat surface as if they were drawing on a piece of paper. The drawing appears on the computer screen and can be saved, edited, or printed. Touch screens provide the same functionality as a mouse or trackpad by allowing users to make selections and commands directly through a device's display screen.
LinkedIn Sales Navigator via Unsplash 9. Touch Screen Many devices nowadays use a touch screen rather than a mouse as a way for users to point, drag, or select options on a screen. As the name suggests, a touch screen is a touch-sensitive monitor screen that reacts to fingers moving across it. Touch screens are particularly common in portable devices, such as tablets, palmtops, laptops, and smartphones.
Although webcams can capture photographs and videos, they are more often used to live-stream videos or facilitate video chats, for this reason. webcam devices often incorporate built-in microphones in addition to cameras. This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.
© 2019 Paul Goodman Comments taigen hall on September 11, 2020: whow caprise williamson on September 09, 2020: cool rfccv on August 22, 2020: nice Wiredu Boateng Foster on August 18, 2020: Thanks Freda Jenkinse on August 13, 2020: How can you detect if someone has connected a Tablet to YOUR phone, can it be an Input Device.
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S.Abibu KETTOR on November 24, 2019: Thanks for helping saminu abdullahi isa on November 20, 2019: Touch screen is not only input device it is both input and output device Ananya. M. Aich on November 01, 2019: Nice ha.thanks a lot for your cooperation and yu helped me to complete my homework of diwali vacation, once again.thank you so much dear mth on October 31, 2019: helpful Blessed on October 30, 2019: Helpful legendYJ on October 30, 2019: that wasn't helpful muhammad aizaz input devices on October 30, 2019: that input devices helpful very helpful lyla on October 24, 2019: Jaclyn on October 22, 2019: This was helpful, thanks a lot.
dwew on October 16, 2019: winner nobody on October 10, 2019: control devices? siraj Yusuf on September 30, 2019: Good contribution. Losa on September 28, 2019: Very good Mahak gupta on September 19, 2019: Thanks a lot . Mahi on September 18, 2019: © 2022 The Arena Media Brands, LLC and respective content providers on this website.
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Products • MiniTool Partition Wizard Award winning disk management utility tool for everyone • MiniTool Power Data Recovery Complete data recovery solution with no compromise • MiniTool Photo Recovery Quick, easy solution for media file disaster recovery • MiniTool Mobile Recovery Android, iOS data recovery for mobile device • MiniTool ShadowMaker Backup and Restore data with ease This article displayed by MiniTool official website focuses on handling sound output/input devices not found issues.
It offers many workable methods that helped a lot of Windows users. Read below to find your solution. Recently, I have updated my Windows 10 to 21H2 and found that my audio not working. It says “No audio device is installed” when I put my mouse on the sound icon (with a cross icon on it) on the taskbar.
Later, I fresh installed Windows 11 and found the problem persists. When I click on the sound icon and select Manage audio devices, it will inform me with a message saying that “No output devices found”. Are you suffering the same situation? If no sound input devices or input devices devices are found in your Windows 11/10 computer, you can’t hear anything from it.
Therefore, it is necessary to fix this issue as soon as possible! The following solutions apply to popular computer brands including Dell, Lenovo, HPAsus, Toshiba, Acer, etc. #1 Add Output Device As described in the error message, you may really have no sound output device connected.
Then, you need to connect an audio output device to your computer. • Navigate to Windows 11 Settings > System > Input devices. • On the sound settings page, double-click the sound device listed in the Output section to view its Properties. input devices In the Properties page of the target output device, Allow apps and Windows to use this device for audio.
• If you can’t see any output device under the Output section, click on the Add device button behind Pair a new output device and follow the instructions to add input devices sound output device. #2 Enable Output Device Sometimes, no output devices found problems may be caused by a disabled output device.
If so, you need to reenable it manually. • Open Windows 11 Device Manager. • Expand the Sound, video and game controllers option to show your output devices. • If the target device is marked with a down arrow, it means it is currently disabled.
All you need to do is to right-click on it and select Enable device. If there is no down arrow on the output device, it means it is already enabled. You input devices disable it and reenable it to try to fix no sound output devices found issues. #3 Update, Reinstall or Downgrade Sound Driver Usually, most sound errors result from outdated or corrupted drivers. If this is your situation. You can deal with the problem by updating or reinstalling your audio driver.
It is easy. Just select Update driver or Uninstall device in the right-click menu of the output device in Device Manager. If you choose Uninstall device, you need to restart your Input devices to let the system download and install a new output device input devices automatically.
If you select Update driver, you need to further choose either Search automatically for drivers or Browse my computer for drivers. If it says that you have already installed the best drivers for your devices, you can further Search for updated drivers on Windows Update or manually look for better drivers on the device manufacturer’s website.
Or, you can directly update the operating system from Windows Settings to get possible sound output device driver updates. Or, you can reset Windows input devices a previous state. Moreover, you can try to roll back your sound driver to deal with no output devices found issues. Just double-click on the target output device in Device Manager to open its Properties. There, go to the Driver tab and select Roll Back Driver. If the Roll Back Driver option is unavailable, it means there is no previous version driver.
#4 Troubleshoot Playing Audio Besides, you can troubleshoot your sound equipment input devices detect and fix the issue. Just right-click on the sound icon in the taskbar and choose Troubleshoot sound problems. #5 Scan for Virus Finally, it may due to viruses or malware that prevents you from using your sound device on your machine. To verify that, you need to perform a virus scan. • Open Windows 11 command prompt (CMD). • Input sfc / scannow and press Enter. • Wait until it finishes.
If there is virus and damaged system files on your PC, this command will repair it by the way. Or, you can rely on antivirus to help you fix the issue and remove viruses. Fix No Input Devices Found Issue The ways to solve the “no input devices found” or “no audio input device is installed” problem are the same as those for “ no audio output device is installed” or “output device not found” issues. Besides, you can change your microphone privacy settings to handle the input devices not found problem.
Go to Settings > Privacy & security > Microphone and enable Microphone access. You can also specify which apps can use the mic on your computer. Windows 11 Assistant Software Recommended The new and powerful Windows 11 will bring you many benefits. At the same time, it will also bring you some unexpected damages such as data loss. Thus, it is strongly recommended that you back up your crucial files before or after upgrading to Win11 with a robust and reliable program like MiniTool ShadowMaker, which will assist you to protect your increasing data automatically on schedules!
Free Download • Facebook • Twitter • Linkedin • Reddit Helen Follow us Input devices Columnist Graduate input devices university in 2014 and step in work as a tech editor the same year. Writings involve mainly in hard disk management and computer data backup and recovery. Through the input devices of diving deep in computer technology, Helen has successfully helped thousands of users fixed their annoying problems.
Personally, Helen loves poetry, sci-fi movies, sport and travel. And, she believes that all her life is the best arrangement from god.
next → ← prev Input Devices Input device enables the user to send data, information, or control signals to a computer.
The Central Processing Unit (CPU) of a computer receives the input devices and processes it to produce the output. Some of the popular input devices are: • Keyboard • Mouse • Scanner • Joystick • Light Pen • Digitizer • Microphone • Magnetic Ink Character Recognition (MICR) • Optical Character Reader (OCR) • Digital Camera • Paddle • Steering Wheel • Gesture recognition devices • Light Gun • Touch Pad • Remote • Touch screen • VR • Webcam • Biometric Devices 1) Keyboard The keyboard is a basic input device that is used to enter data into a computer or input devices other electronic device by pressing keys.
It has different sets of keys for letters, numbers, characters, and functions. Keyboards are connected to a computer through USB or a Bluetooth device for wireless communication. Types of keyboards: There can be different types of keyboards based on the region and language used. Some of the common types of keyboards are as follows: i) QWERTY Keyboard: It is the most commonly used keyboard with computers in modern times.
It is named after the first six letters of the top row of buttons and is even popular in countries that do not use Latin-based alphabet. It is so popular that some people think that it is the only type of keyboard to use with computers as an input device. ii) AZERTY Keyboard: Input devices is considered the standard French keyboard. It is developed in France as an alternative layout to the QWERTY layout and is mainly used in France and other European countries.
Some countries have manufactured their own versions of AZERTY. Its name is derived from the first six letters that appear on the top left row of the keyboard. The Q and W keys in AZERTY keyboard are interchanged with A and Z keys in QWERTY keyboard. Furthermore, in AZERTY keyboard M key is located to the left of the L key.
AZERTY keyboard differs from QWERTY keyboard not only in the placement of letters but also in many other ways, e.g., it gives emphasis on accents, which is required for writing European languages like French. iii) DVORAK Keyboard: This type of keyboard layout was developed to increase the typing speed by reducing the finger movement while typing.
The most frequently used letters are kept in a home row to improve typing. 2) Mouse The mouse is a hand-held input device which is used to move cursor or pointer across the input devices.
It is designed to be used on a flat surface and generally has left and right button and a scroll wheel between them. Laptop computers come with a touchpad that works as a mouse.
It lets you control the movement of cursor or pointer by moving your finger over the touchpad. Some mouse comes with integrated features such as extra buttons to perform different buttons. The mouse was invented by Douglas C. Engelbart in 1963.
Early mouse had a roller ball integrated as a movement sensor underneath the device. Modern mouse devices come with optical technology that controls cursor movements by a visible or invisible light beam. A mouse is connected to a computer through different ports depending on the type of computer and type of a mouse. Common types of the mouse: i) Trackball Mouse: It is a stationary input device that has ball mechanism to move the pointer or cursor on the screen.
The ball is half inserted in the device and can be easily rolled with finger, thumb or the palm to move the pointer on the screen. The device has sensor to detect the rotation of ball.
It remains stationary; you don't need to move it on the operating surface. So, it is an ideal device if you have limited desk space as you don't need to move it like a mouse. ii) Mechanical Mouse: It has a system of input devices ball and several rollers to track its movement.
It is a input devices type of mouse. A mechanical mouse can be used for high performance. The drawback is that they tend to get dust into the mechanics and thus require regular cleaning. iii) Optical Mouse: An optical mouse uses optical electronics to track its movement. It is more reliable than a mechanical mouse and also requires less maintenance. However, its performance is affected by the surface on which it is operated.
Plain non-glossy mouse mat should be used for best results. The rough surface may cause problems for the optical recognition system, and the glossy surface may reflect the light wrongly and thus may cause tracking issues.
iv) Cordless or Wireless Mouse: As the name suggests, this type of mouse lacks cable and uses wireless technology such as IrDA (infrared) or radio (Bluetooth or Wi-Fi) to control the movement of the cursor. It is used to improve the experience of using a mouse.
It uses batteries for its power supply. 3) Scanner The scanner uses the pictures and pages of text as input. It scans the picture or a document. The scanned picture or document then converted into a digital format or file and is displayed on the screen as an output.
It uses optical character recognition techniques to convert images into digital ones. Some input devices the common types of scanners are as follows: Types of Scanner: i) Flatbed Scanner: It has a glass pane and a moving optical CIS or CCD array. The light illuminates the pane, and then the image is placed on the glass pane. The light moves across the glass pane and scans the document and thus produces its digital copy. You will need a transparency adapter while scanning transparent slides.
ii) Handheld Scanner: It is a small manual scanning device which input devices held by hand and is rolled over a flat image that is to be scanned.
The drawback in using this device is that the hand should be steady while scanning; otherwise, it may distort the image. One of the commonly used handheld scanners is the barcode scanner which you would have seen in shopping stores. iii) Sheetfed Scanner: In this scanner, the document is inserted into the slot provided in the scanner. The main components of this scanner include the sheet-feeder, scanning module, and calibration sheet.
The light does not move in this scanner. Instead, the document moves through the scanner. It is suitable for scanning single page documents, not for thick objects like books, magazines, etc. iv) Drum Scanner: Drum scanner has a photomultiplier tube (PMT) to scan images. It does not have a charge-coupled device like a flatbed scanner. The photomultiplier tube is extremely sensitive to light. The image is placed on a glass tube, and the light moves across the image, which produces a reflection of the image which is captured by the PMT and processed.
These scanners have high resolution and are suitable for detailed scans. v) Photo Scanner: It is designed to scan photographs. It has high resolution and color depth, which are required for scanning photographs.
Input devices photo scanners come with in-built software for cleaning and restoring old photographs. 4) Joystick A joystick is also a pointing input device like a mouse. It is made up of a stick with a spherical base. The base is fitted in a socket that allows free movement of the stick. The movement of stick controls the cursor or pointer on the screen.
The frist joystick was invented by C. B. Mirick at the U.S. Naval Input devices Laboratory. A joystick can be of different types such as displacement joysticks, finger-operated joysticks, hand operated, isometric joystick, and more. In joystick, the cursor keeps moving in the direction of the joystick unless it is upright, whereas, in mouse, the cursor moves only when the mouse moves.
5) Light Pen A light pen is a computer input device that looks like a pen. The tip of the light pen contains a light-sensitive detector that enables the user to point to or select objects on the display screen.
Its light sensitive tip detects the object location and sends the corresponding signals to the CPU. It is not compatible with LCD screens, so it is not in use today. It also helps you draw on the screen if needed. The first light pen was invented around 1955 as a part of the Whirlwind project at the Massachusetts Institute of Technology (MIT).
6) Digitizer Digitizer is a computer input device that has a flat surface and input devices comes with a stylus. It enables the user to draw images and graphics using the stylus as we draw on paper with a pencil. The images or graphics drawn on the digitizer appear on the computer monitor or display screen.
The software converts the touch inputs into lines and can also convert handwritten text to typewritten words. It can be used to capture handwritten signatures and data or images from taped papers. Furthermore, it is also used to receive information in the form of drawings and send output to a CAD (Computer-aided design) application and software like AutoCAD.
Thus, it allows you to convert hand-drawn images into a format suitable for computer processing. 7) Microphone The microphone is a computer input device that is used to input the sound. It receives the sound vibrations and converts them into audio signals or sends to a recording medium. The audio signals are converted into digital data and stored in the computer. The microphone also input devices the user to telecommunicate with others.
It is also used to add sound to presentations and with webcams for video conferencing. A microphone can capture audio waves in different ways; accordingly the three most common types are described below: i) Dynamic: It is the most commonly used microphone with a simple design. It has a magnet which is wrapped by a metal coil and a thin sheet on the front end of the magnet.
The sheet transfers vibrations from sound waves to the coil and from coil to electric wires which transmit the sound like an electrical signal. ii) Condenser: It is designed for audio recording and has a very sensitive and flat frequency response.
It has a front plate called diaphragm and a back plate parallel to the front plate. When sound hits the diaphragm, it vibrates the diaphragm and alters the distance between the two plates.
The changes in distance are transmitted as electric signals. input devices Ribbon: It is known for its reliability. It has a thin ribbon made of aluminum, duraluminum, or nanofilm suspended in a magnetic field. The sound waves cause vibrations in the ribbon, which generate a voltage proportional to the velocity of the vibration.
The voltage is transmitted as an electrical signal. Early ribbon microphones had a transformer to increase the output voltage, but modern ribbon microphones come with advanced magnets input devices produce a strong signal. 8) Magnetic Ink Character Recognition (MICR) MICR computer input device is designed to read the text printed with magnetic ink. MICR is a character recognition technology that makes use of special magnetized ink which is sensitive to magnetic fields.
It is widely used in banks to process the cheques and other organizations where security is a major concern. It can process three hundred cheques in a minute with hundred-percent accuracy.
The details on the bottom of the cheque (MICR No.) are written with magnetic ink. A laser printer with MICR toner can be used to print the magnetic ink.
The device reads the details and sends to a computer for processing. A document printed in magnetic ink is required to pass through a machine which magnetizes the ink, and the magnetic information is then translated into characters.
9) Optical Character Reader (OCR) Input devices computer input device is designed to convert the scanned images of handwritten, typed or printed text into digital text. It is widely used in offices and libraries to convert documents and books into electronic input devices. It processes and copies the physical form of a document using a scanner.
After copying the documents, the Input devices software converts the input devices into a two-color (black and white), version called bitmap. Then it is analyzed for light and dark areas, where the dark areas are selected as characters, and the light area is identified as background. It is widely used to convert hard input devices legal or historic documents into PDFs.
The converted documents can be edited if required like we edit documents created in ms word. 10) Digital camera: It is a digital device as it captures images and records videos digitally and then stores them on a memory card. It is provided with an image sensor chip to capture images, as opposed to film used by traditional cameras.
Besides this, a input devices that is connected to your computer can also be called a digital camera. It has photosensors to record light that enters the camera through the lens.
When the light strikes the photosensors, each of the sensors returns the electrical current, which is used to create the images. 11) Paddle: It is a simple input device that is widely used in games. It is a wheel that is held by hand and looks like a volume knob on a stereo that is used to increase or decrease the volume. Paddle moves or controls cursor or any other objects in the game in a back-and-forth motion.
It is widely used as an alternative to the joystick. Besides this, the term paddle also refers to many handheld devices designed to control a function in an electronic device, computer, etc.
12) Steering wheel: It is used as an input device in racing video games such as car racing games or in driving programs as virtual simulators to steer a vehicle. It works like the real steering wheel by allowing you to take a right or left turn.
A steering wheel may be provided with acceleration and brake pedal devices and a mechanism for shifting gears. Thus, it makes racing games more adventurous and entertaining. 13) Gesture recognition devices: These devices take input devices gestures as input. There are many such devices that respond to gestures. For example, Kinect is one such device that observes the movement of a player's body and interprets these movements as inputs to video games.
This feature is also available in certain tablets and smartphones where you can perform certain tasks such as taking pictures using finger gestures such as swiping, pinching, etc. 14) Light Gun: As the name suggests, it is a pointing input device that is designed to point at and shoot the targets on the screen in a video game, or arcade, etc.
The light gun was used for the first time on the MIT Whirwind computer. When the gun is pointed at the target on the screen and the trigger is pulled, the screen goes blank for a fraction of a second.
During this moment, the photodiode, which is present in the barrel, determines where the gun is pointed. For example, shooting ducks in a duck hunt game. 15) Touchpad: It is usually found in laptops as a substitute for the mouse. It allows you to move or control the cursor on the screen using your finger. Just like a mouse, it also has two buttons for right and left click.
Using the touchpad, you can perform all the tasks that you do with a mouse, such as selecting an object on the screen, copy, paste, delete, open a file or folder, and more. 16) Remote: It is a hardware device designed to control the functioning of a device, e.g., a TV remote that can be used to change channels, increase or decrease the volume, from a distance without leaving the seat.
The first cordless TV remote was invented by Dr. Robert Adler of Zenith in 1956. The remote sends the electromagnetic waves to communicate with the device. These waves can be infrared rays, radio waves, etc. 17) Touch screen: It is the display screen of a device such as a smartphone, tablet, etc., that allows users to interact or provide inputs to the device by using their finger. Today, most of the electronic devices come with touchscreen as an alternative to a mouse for navigating a graphical user interface.
For example, by touching, you can unlock your phone, open emails, open files, play videos, etc. Besides this, it is used in lots of devices such as Camera, Car GPS, Fitness machine, etc.
The concept of the touch screen was first introduced and published by E.A. Johnson in 1965. The first touch screen was developed at the beginning of the 1970s by CERN engineers Frank Beck and Bent Stumpe. 18) VR: VR stands for virtual reality. It is an artificial or virtual environment which is generated by computers. A person can interact with virtual objects of this artificial environment using some input devices such as headsets, gloves, headphones, etc. For example, he or she can find himself or herself walking on a beach, watching a football match, walking in the sky, etc., without actually doing all this.
19) Webcam: Any camera which is connected to a computer is called a webcam. The in-built camera provided on a computer can also be considered a webcam. It is an input device as it can take pictures, and can be used to record videos if required. The pictures and videos are stored in the computer memory and can be displayed on the screen if required. Although it works almost the same as the digital camera, it is different from a digital camera, as it is designed to take compact digital photos that can be uploaded easily on the webpages and shared with others through the internet.
20) Biometric Devices: Biometrics refers to a process in which a person is identified through his or her biological features such as fingerprints, eye cornea, face structure, etc.
It is done by using biometric input devices, which can be of different types based on their scanning features and abilities, such input devices i) Face Scanner: It is designed to identify a person by scanning his or her face.
It takes the face measurements of a person. For example, the distance between eyes, nose, and mouth, etc., accordingly, it confirms the identity of a person. Besides this, it is smart enough to differentiate between a person's picture and the real person.
ii) Hand Scanner: The hand of a person can also be used to verify his or her identity as every person has a unique pattern of veins in the palm, just like fingerprints. This device takes advantage of this feature; it identifies a person by scanning the palm of his hand. It uses infrared light to scan veins' patterns and blood flowing in them.
Palm is even more unique than fingerprints. iii) Fingerprint Scanner: It scans the fingerprints to identify people or for biometric authentication. This device is developed, keeping in mind the fact that no two persons in the world can have the same fingerprints.
It is widely used in companies as a fingerprint attendance system to mark the attendance of employees. This type of scanners captures the pattern of valleys and ridges found on a finger and store it in the memory or database. When you press your finger on the given space, it verifies the identity by using its pattern-matching software.
iv) Retina or Iris Scanner: It scans the retina or iris of a person's eye to confirm the identity. This device is more secure than others as it is next to impossible to copy the retina or iris.
It input devices by mapping the retina's blood vessel patterns of the eye. The blood vessels of retina absorb light more easily as well as can be identified with appropriate lighting.
In this scan, a beam of low-energy infrared light falls on the retina through the scanner's eyepiece. Then, the software captures the network of blood vessels in the retina and uses it to verify a person's identity.
v) Voice Scanner: It records the voice of a person and digitizes it to create a distinctive voice print or template. The voiceprints are stored in the database, and are used to verify the voice of a person to confirm his or her identity. The person is required to speak in the normal or same voice that was used to create a voice template.
It is not much reliable as it can be misused using a tape recording. Javatpoint Services JavaTpoint offers too many high quality services. Mail us on [email protected], to get more information about given services. • Website Designing • Website Development • Java Development • PHP Development • WordPress • Graphic Designing • Logo • Digital Marketing • On Page and Off Page SEO • PPC • Content Development • Corporate Training • Classroom and Online Training • Data Entry
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It allows the input of raw data to the computer for processing. Here’s a list of some input devices used in computers and other computing devices: • Keyboard – one of the primary input devices used to input data and commands.
It has function keys, control keys, arrow keys, keypad and the keyboard itself with the letters, numbers and commands. Keyboards are connected to the computer through USB or Bluetooth. A laptop keyboard is more compact than a desktop keyboard to make the laptop smaller and lighter. Smartphones and tablets use on-screen keyboard to input messages and select commands. • Mouse – an input device used to control the cursor and input devices.
It can be wired or wireless. It allows the user to do the following: • Move the mouse cursor • Select • Scroll • Open or execute a program • Drag-and-drop • Hover • Perform other functions with the use of additional buttons • A laptop uses a touchpad as the mouse. A input devices and tablet use a touchscreen as primary input device and the user’s finger is used as the mouse.
• Microphone – an input device that allows users to input audio into their computers. Here are some uses of the microphone: • Audio for video • Computer gaming • Online chatting input devices Recording musical instruments • Recording voice for dictation, singing and podcasts • Voice recorder • Voice recognition • VoIP – Voice over Internet Protocol • Digital Camera – is an input device that takes pictures digitally.
Images are stored as data on memory cards. It has an LCD screen that allows users to preview and review images.
Digital cameras have become popular over film cameras because of the following features: • LCD screen – allows users to view the photos and videos immediately • Storage – can store thousands of pictures • Picture development – allows users to choose and input devices which pictures to develop • Size – takes up less space and input devices be easily carried • Scanner – is an input device that reads an image and converts it into a digital file.
A scanner is connected to a computer through USB. There are different types of scanners: • Flatbed scanner – uses a flat surface to scan documents • Sheetfed scanner – like a laser printer where paper is fed into the scanner • Handheld scanner – the scanner is dragged over the page to be scanned • Card scanner – for scanning business card • Touchscreen – is an input device that allows users to interact with a computer using their fingers.
It is used widely in laptop monitors, smartphones, tablets, cash registers and information kiosks. Most common functions of touchscreens are as follows: • Tap • Double-tap • Touch and hold • Drag • Swipe • Pinch • Barcode Reader – also known as barcode scanner or point of sale (POS) scanner, is an input device capable of reading barcodes. • Webcam – is an input device connected to the input devices and the internet that captures still picture or motion video.
• Biometric devices – is an input device used to input biometric data into a computer.
Here are the types of biometric devices: • Face scanner • Hand scanner • Finger scanner • Voice scanner input devices Stylus – is a pen-shaped input device used to write or draw on the screen of a graphic tablet or device. Initially it was just used for graphic tablets and PDAs, but now, it has become popular on mobile devices as a replacement for the user’s fingers. It’s used for more accurate navigation and to keep oils from user’s fingers off the device screen.
Further Readings: • Input device