An input device is a device that allows a user to send data, information, or control signals to a computer from another device. The Central Processing Unit (CPU) of a computer is responsible for receiving and processing data in order to create an output.
The keyboard is a fundamental input device that allows you to enter data into a computer or any other electronic device by hitting keys on the keyboard. Letters, numbers, characters, and functions are all represented by distinct sets of keys. To communicate wirelessly, keyboards are connected to computers via USB ports or Bluetooth devices, respectively.
Mouse refers to a hand-held input device that is used to move the cursor or pointer around on a computer screen. It is intended to be used on a flat surface and is often equipped with a left and right button as well as a scroll wheel in between. Laptop computers are equipped with a touchpad that may be used in place of a mouse. Moving your finger across the touchpad allows you to control the movement of the cursor or pointer. Some mice include built-in functionality such as additional buttons that may be used to accomplish a variety of functions.
Douglas C. Engelbart created the mouse in 1963, and it has been in use ever since. A roller ball was included as a movement sensor beneath the surface of the gadget in the early days of the mouse. Many modern mouse devices are equipped with optical technology, which allows them to control cursor motions through the use of a visible or invisible light beam. There are several ports available for connecting mice to computers, depending on the type of computer and mouse being used in conjunction with it.
The images and pages of text are fed into the scanner using the scanner’s input. It scans a photograph or a piece of paper. In the following step, the scanned image or document is transformed into a digital format or file, which is then presented on the screen as the output. It converts photos into digital format through the use of optical character recognition algorithms. The following are some examples of common types of scanners:
A joystick, like a mouse, may be used as a pointing input device. It is comprised of a stick with a spherical base on which it is mounted. The base is connected into a socket, which allows the stick to move freely within it. The cursor or pointer on the screen is controlled by the movement of the stick.
C. B. Mirick, working at the United States Naval Research Laboratory, was the first to create the joystick. It is possible to have many sorts of joysticks, including displacement joysticks, finger-operated joysticks, hand-operated joysticks, isometric joysticks, and more. When using a joystick, the cursor continues to travel in the direction of the joystick until the joystick is upright, however when using a mouse, the cursor only moves when the mouse is moved.
5) Light Pen
A light pen is a computer input device that has the appearance of a writing instrument. The light pen’s tip is equipped with a light-sensitive detector, which allows the user to point to and select things on the display screen with his or her finger. Its light-sensitive tip determines the position of the item and delivers the relevant signals to the central processing unit. Because it is incompatible with LCD panels, it is no longer in use in today’s world. It can also assist you in drawing on the screen if necessary. When the Whirlwind project at the Massachusetts Institute of Technology began in 1955, the first light pen was created as part of that effort (MIT).
This type of computer input device is flat and generally comes with a pen, which serves as the input device’s input device. It allows the user to create pictures and graphics using the stylus in the same way that we would draw on paper with a pencil. The pictures or graphics created on the digitizer are shown on a computer monitor or display screen, which is also known as a display screen. When a touch input is received, the programme translates it into lines, and it can also convert handwritten letters into typewritten words.
A handwritten signature and data or photos from taped documents can both be captured with this device. CAD (Computer-aided design) applications and software, such as AutoCAD, are also used to accept information in the form of drawings and to output the results to a CAD application or software. As a result, it makes it possible to turn hand-drawn graphics into a format that can be processed by computers.
The microphone is a type of computer input device that is used to record and input audio data. Receives sound vibrations and turns them into audio signals, which are then sent to a recording medium or played back on a stereo system. The auditory impulses are transformed into digital data, which is then stored in a computer system. The microphone also enables the user to connect with others via the telephone network. Moreover, it is utilised to enhance the audio quality of presentations, as well as with cameras for video conferencing. A microphone may collect audio waves in a variety of ways; as a result, the three most popular varieties are discussed in detail below:
8) Magnetic Ink Character Recognition (MICR)
The MICR computer input device is designed to read text written with magnetic ink on a magnetic substrate. Character recognition technology, also known as MICR, makes use of a specific magnetised ink that is sensitive to magnetic fields in order to recognise characters. For example, it is commonly used in banks to handle cheques, as well as other businesses where security is of paramount importance.
It has the ability to process three hundred cheques in a minute with 100 percent precision. The magnetic ink is used to write the information on the bottom of the cheque (MICR No.) on the cheque. To print the magnetic ink, a laser printer equipped with MICR toner can be utilised.
The gadget reads the information and sends it to a computer for further analysis. To convert magnetic information into characters, a document printed with magnetic ink must pass through a machine that magnetises the ink and converts the magnetic information into characters.
9) Optical Character Reader (OCR)
A computer input device that converts scanned images of handwritten, typed, or printed text into digital text is known as an OCR computer input device. When it comes to converting documents and books into electronic files, it is frequently utilised in offices and libraries.
It makes use of a scanner to process and copy the physical form of a document. Using optical character recognition (OCR), after copying the documents, the OCR software turns the documents into a two-color (black and white) version known as a bitmap. Once this has been done, it is evaluated for bright and dark regions, with the dark portions being designated as characters and the light areas being designated as background. Generally, it is used to convert paper-based legal or historical documents into PDF format. If necessary, the translated papers can be changed in the same way that we edit documents written in Microsoft Word.
10) Digital camera:
Photographic instrument that captures and records photos and movies on a digital medium, and then stores them on a memory card, is known as a digital camera. Image sensor chips are used to collect photos instead of the film used by traditional cameras, which allows it to take images faster. In addition to this, a camera that is connected to your computer may be referred to as a digital camera as well.
Light entering the camera through the lens is captured and stored by photosensors in the camera’s body. Photosensors are activated when light reaches them, and each of the sensors returns an electrical current, which is then utilised to generate the pictures.
A paddle is a basic input device that is extensively used in video games and other applications. To increase or reduce the level, it is necessary to turn a wheel that is held in the hand and appears similar to a volume knob on a stereo system. The paddle is used to move or control the cursor or any other objects in the game by moving them back and forth. It is often used as a substitute for the joystick in video games. In addition to this, the term paddle refers to a variety of portable devices that are meant to control a function in an electronic device, computer, or other electronic equipment.
12) Steering wheel:
This device is used as an input device in racing video games such as automobile racing games or in driving simulators to manoeuvre a vehicle. It is also utilised as an input device in driving simulators and virtual simulators. It functions similarly to a traditional steering wheel in that it allows you to turn either right or left. It is possible to equip a steering wheel with accelerator and brake pedals, as well as a gearshifting mechanism, among other features. As a result, it makes racing games more exciting and fun to play.
13) Gesture recognition devices:
These devices use human gestures as input. It is possible to find various gadgets that respond to hand gestures. As an example, one such gadget is the Kinect, which detects and analyses the movement of a player’s body in order to provide input to video games. Swiping, pinching and other finger motions are also supported by some tablets and smartphones, allowing you to execute specific tasks, including shooting images, with the help of your fingers.
14) Light Gun:
Its name implies that it is a pointing input device that is meant to aim at and fire targets on the screen in a video game, arcade, or other similar environment. The MIT Whirwind computer was the first to make use of the light gun, which was employed for the first time. When the gun is aimed at the target on the screen and the trigger is pushed, the screen goes black for a fraction of a second before returning to normal. The gun’s direction is determined at this point by the photodiode that is located in the barrel of the weapon. For instance, shooting ducks in a duck hunt game is one example of this.
This is a device that is typically found in laptops and serves as a substitute for the mouse. Your finger may be used to move or manipulate the cursor on the screen while utilising this feature. It includes two buttons for right and left clicks, just like a mouse, just like a mouse. You can accomplish all of the actions that you would normally conduct with a mouse, such as selecting an object on the screen, copying and pasting, deleting, opening a file or folder, and so on, using the touchpad.
A remote control is a hardware device meant to control the operation of a device from a distance, such as a television remote that may be used to change channels or increase or decrease the volume without having to get out of your seat. Dr. Robert Adler of Zenith designed the world’s first cordless television remote control in 1956. The remote control transmits electromagnetic waves to the gadget in order to communicate with it. These waves might be infrared rays, radio waves, or any other type of wave.
17) Touch screen:
A touch screen is a display screen on a device such as a smartphone, tablet, or other similar device that allows users to interact with the device or offer inputs to it by using their finger. In today’s world, most electronic gadgets are equipped with a touchscreen, which may be used instead of a mouse to navigate through a graphical user interface. For example, you can unlock your phone, open emails, open files, play videos, and perform other actions just by touching it. Aside from that, it is found in a variety of gadgets like as cameras, car navigation systems, fitness machines, and so on.
E.A. Johnson was the first person to introduce and publish the notion of the touch screen, which occurred in 1965. Frank Beck and Bent Stumpe, two CERN engineers, invented the world’s first touch screen in the beginning of the twentieth century.