Input Devices

Input devices are important parts of a computer that help us communicate with the system.

• These devices let us send data or commands to the computer, allowing it to process information and perform tasks.
• Whether it's typing on a keyboard or clicking a mouse, these devices enable us to interact with the computer and accomplish tasks.

How Does an Input Device Work?

An input device converts user actions or physical movements into signals that the computer can understand and process.

For example, pressing a key on a keyboard makes the computer receive and use that letter. The device changes actions (like typing or clicking) into signals the computer can understand.

Different Types of Input Devices

There are Various types of Input Devices and in the below section you will explore all types of input devices.

Keyboard

Keyboard is the most common and commonly used input device. It allow users to input text and commands.

• It contains different keys for entering letters, numbers, and characters.
• Supports multiple layouts (e.g., QWERTY, AZERTY).
• Connects via USB, wireless, or integrated in devices like laptops.

Mouse

The mouse is a small handheld device commonly used to point and control the cursor on a computer screen.

• Includes buttons and scroll wheel for clicking, selecting, and navigating.
• Available in wired, wireless, or optical variants.
• Used to select, drag, and open files or programs.
• Works on a flat surface for movement.

Scanner

A scanner is a type of input device that works in the same way as a photocopier. It's used when there's data on paper that needs to be transferred to the computer's hard disc for further processing.

• Captures images or text from physical documents.
• Converts paper-based data into digital format for storage.
• Enables editing of scanned images before printing.

Barcode Reader

A barcode reader is a device that reads bar-coded data (data that is represented by light and dark lines). To label things, number books, and so on, bar-coded data is often utilised.

• Extracts information from barcodes on products or labels.
• Available as handheld scanners or integrated systems.
• Uses light beams to decode barcode patterns.

Web Camera

A webcam is an input device since it records a video image of the scene in front of it. It can either be incorporated inside the computer (for example, a laptop) or connected via USB.

• Connects via USB or built into devices like laptops.
• Supports video recording and live streaming applications.
• Known as webcam for its web-based functionality.

Touchscreen

A touchscreen is a type of input device that allows users to interact with a digital display by directly touching the screen's surface.

• Supports actions like selecting, typing, or drawing.
• Uses virtual keyboards or gestures for input.
• Common in smartphones, tablets, and ATMs.

Suggested Quiz

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5 Questions

Which of the following is considered an input device in a computer system?

• A
  Monitor
• B
  Keyboard
• C
  Printer
• D
  Speaker

Explanation:

What is the primary function of input devices in a computer system?

• A
  To display information
• B
  To send data or commands to the computer
• C
  To store data permanently
• D
  To process data

Explanation:

How does a mouse primarily interact with a computer?

• A
  By typing text
• B
  By clicking and moving the cursor
• C
  By scanning documents
• D
  By displaying images

Explanation:

What is the main purpose of a scanner as an input device?

• A
  To print documents
• B
  To capture images or text from physical documents
• C
  To display video
• D
  To connect to the internet

Explanation:

Which input device allows users to interact directly with a display by touching it?

• A
  Keyboard
• B
  Mouse
• C
  Touchscreen
• D
  Webcam

Explanation:

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