List of Input Devices
Any gadget that feeds information to the computer and allows people to interact with the system and control it is called an input device. On a computer, the keyboard and mouse are the most often used input devices. However, a variety of devices can be used to enter data into a computer. Here, we will discuss such input devices in detail.
List of Input devices
The following are some of the most prevalent computer input devices:
A computer keyboard, often known as a laptop keyboard, is a piece of hardware that allows you to input data into a computer. It is often a plug-and-play gadget. The alphabets (A-Z), numerals (0-9), symbols, and function keys are all found on a computer keyboard. These days, USB and wireless keyboards are widely used. Previously, the PS/2 keyboard was the most popular.
Types of Keys in a Keyboard
The following are the types of keys on the keyboard:
The most widely used pointing device is the mouse. It is a well-known cursor-control gadget made out of a tiny palm-sized box with a spherical ball at its base that detects mouse movement and sends suitable signals to the CPU when mouse buttons are pressed.
It usually includes two buttons on the left and right, with a wheel in the centre. You can move the cursor around the screen using the mouse, but you can't input text into the computer with it.
Some common types of Mouse
A joystick is a pointing device for computers that allows you to move the pointer around the screen. Both the bottom and top ends of the stick are connected to a spherical ball, and the bottom spherical ball slips in a socket. You may move the joystick in all four directions.
C. B. Mirick of the US Naval Research Laboratory created the first joystick. Different varieties of joysticks exist, including displacement joysticks, finger-operated joysticks, hand-operated joysticks, isometric joysticks, and more. The pointer in a joystick continues to travel in the direction of the joystick until it is upright.
A scanner, like a photocopier, is an input device that is used when paper data has to be transferred to a computer's hard disc and subsequently modified.
The scanner gathers images from the source and transforms them into a digital version stored on a disc. Before they're printed, you can alter these pictures.
5. Light Pen
The light pen's tip has a light-sensitive detector that allows users to pick items on the display screen by pointing to them. The item's position is detected by its light-sensitive tip, which transmits the appropriate signals to the CPU. It can also assist you in drawing on the screen if necessary. Because LCD screens are incompatible with light pen, it is no longer in use. In 1955, the Massachusetts Institute of Technology's Whirlwind project produced the first light pen (MIT).
A digitizer is a device that transforms analog data into digital data. A digitizer can transform a television or camera feed into a series of numbers stored in a computer. They can be used to create an image of the object at which the camera is pointed by the computer.
Because it transforms images and graphical data into binary inputs, the digitizer is also called a Tablet or Graphics Tablet. For fine sketching and image manipulation applications, a graphic tablet is used as a digitizer.
A microphone is a type of sound input device used by computers. It absorbs sound vibrations and transforms them into audio signals or records them on media. The audio impulses are transformed into digital data, which is then saved in the computer. The user can also utilize the Microphone to converse with others. It is also used with cameras for video conferencing and to provide sound to the presentations.
Two common types of Microphones are given below:
8. Magnetic Ink Card Reader (MICR)
Because banks handle a significant number of cheques every day, MICR input devices are commonly used at banks. The check number and the bank's code number are written using a special ink containing machine-readable magnetic particles.
9. Digital camera
It is a digital device since it captures photographs and records videos digitally before saving them on a memory card. Instead of the film that traditional cameras use to capture images, it uses an image sensor chip. This camera is connected to your computer.
10. Track Ball
A trackball is an input device that is widely used instead of a mouse in notebook or laptop computers. The pointer on this half-inserted ball may be adjusted by moving fingers on the ball.
A trackball takes up less room than a mouse because the entire device is not moved. A trackball might be shaped like a ball, button, or square.
It's a hand-held wheel that increases or decreases volume in the same way a volume knob on a stereo does. In a back-and-forth motion, the paddle moves or controls the cursor or other game elements. It is commonly used as a joystick replacement.
It's generally seen in laptops as a mouse replacement. It lets you manage the cursor on the screen with your finger. It has two buttons, much like a mouse, for right and left-clicking.
13. Touch screen
The display screen of a smart phone, tablet, or another device that allows users to interact with the device or submit inputs with their fingers is known as a touch screen. Now, most of the electronic gadgets have a touch screen as an alternative to using a mouse to navigate a graphical user interface. Touching, for example, can unlock your phone, access emails, open files, play movies, and so on.
A webcam is a built-in camera on a computer. This input device can capture photographs and, if necessary, record videos. The photographs and movies are saved in the computer's memory and can be viewed on the screen.
15. Light Gun
It is a pointing input device used to aim and firing the targets on a video game, arcade, or another screen. The light cannon were used on the MIT Whirlwind computer for the first time.
16. Biometric Devices
Biometrics is the technique of identifying a person based on biological characteristics such as fingerprints, eye cornea, facial anatomy, etc. It is done with biometric devices, which come in various shapes and sizes depending on their scanning capabilities.
The term "virtual reality" is abbreviated as "VR." A computer-generated artificial or virtual environment is what it refers to. A human may interact with virtual things in this artificial environment via input devices like headsets, gloves, and headphones.
18. Steering wheel
In racing video games, such as automobile racing games or driving simulators, a steering wheel is used to operate a vehicle. It functions similarly to a conventional steering wheel and allows you to turn right or left.