Input devices
Introduction
Input devices are hardware components used to enter data and commands into a computer system. They allow users to interact with the computer by providing information for processing.
Types of Input Devices
1. Keyboard 🖋️
The most common input device used for typing text and commands.
Types:
- Mechanical Keyboard – Uses physical switches for better response.
- Membrane Keyboard – Uses rubber dome keys, softer to press.
- Wireless Keyboard – Connects via Bluetooth or USB receiver.
- Virtual Keyboard – Software-based keyboard on touchscreens.
2. Mouse 🖱️
A pointing device used to control the cursor on a screen.
Types:
- Mechanical Mouse – Uses a rubber ball for movement.
- Optical Mouse – Uses laser or LED sensors for movement.
- Wireless Mouse – Connects via Bluetooth or RF receiver.
- Trackball Mouse – Uses a rolling ball for precision movement.
3. Touchscreen 📱
Allows direct interaction with a device by touching the screen.
Used in smartphones, tablets, ATMs, and kiosks.
Types:
- Resistive Touchscreen – Works by pressure, used in ATMs.
- Capacitive Touchscreen – More responsive, used in smartphones.
4. Scanner 📠
Converts physical documents into digital format.
Types:
- Flatbed Scanner – Commonly used for scanning photos and documents.
- Barcode Scanner – Reads barcodes, used in retail stores.
- QR Code Scanner – Scans QR codes for payments and links.
- Handheld Scanner – Portable scanner for scanning books and receipts.
5. Microphone 🎤
Captures sound input for voice commands, recording, and communication.
Used in voice assistants (Alexa, Siri), gaming, and online meetings.
Types:
- Dynamic Microphone – Used for live performances.
- Condenser Microphone – Used for studio recordings and podcasts.
6. Web Camera (Webcam) 📷
- Captures images and videos for video conferencing, streaming, and surveillance.
- Used in laptops, desktops, and security systems.
7. Joystick & Game Controller 🎮
- Used for gaming and simulation applications.
- Provides better control in video games and flight simulators.
8. Light Pen ✏️
- A pen-shaped device used to draw directly on a screen.
- Used in graphic design, CAD applications, and touchscreen interaction.
9. Biometric Devices 🔐
- Used for security authentication via fingerprints, retina scans, or facial recognition.
- Used in smartphones, offices, and government security systems.
10. Digital Pen & Stylus 🖊️
- Used for writing, drawing, and designing on touchscreen devices.
- Used in tablets, digital notepads, and graphic design tools.