Peripheral Devices Flashcards

Study Notes

Peripheral Devices Overview

Peripheral devices are external components that either send information to or retrieve information from a computer.
They are categorized into three types:
- Input devices
- Output devices
- Input & Output (I/O) devices

Keyboards

Connect through USB ports, with many featuring special function keys for tasks like music control and web browsing.
Some models include built-in USB ports for additional devices.
Necessary for desktop computer functionality, alongside a mouse and display device.

Computer Mouse

Available in wired or wireless options.
Wired mice connect via USB; wireless mice operate on RF signals (like Bluetooth) and require batteries.
Optical mice do not function on certain surfaces due to their light-ray detection method.
High-end gaming mice feature DPI ratings, impacting precision in cursor movement.

Digitizers

Devices that capture analog signals and convert them to digital data.
Types of digitizers:
- Graphics Tablets: Used by artists to capture hand-drawn images.
- Document Scanners: Convert paper documents to digital formats, utilizing OCR for editable content.
- 3D Scanners: Map physical objects into 3D digital models using contact or laser technology.

Game Controllers & Joysticks

Specialized input devices for gaming.
Two main types:
- Gamepads: Handheld controllers with directional controls and buttons.
- Joysticks: Pivoting sticks on a base, commonly used for flight simulator games.

Scanners

Convert hard-copy images and documents into digital formats.
Some scanners can create editable documents while performing general scanning tasks.

Motion Sensors

Detect minimal movement, primarily for security applications.
Two types:
- Active motion sensors: Use ultrasonic sound waves to trigger actions upon detection.
- Passive motion sensors: Detect infrared energy to identify living beings, minimizing false alarms.

Touch Pads

Commonly found on notebooks as a mouse alternative; can also be used with desktops.
Users manipulate the cursor by sliding their finger across the touchpad, connecting via USB.

Smart Card Readers

Authentication devices that read embedded microchips in smart cards.
They can be standalone or integrated with other devices, such as keyboards.

Biometric Scanners

Authentication technology that verifies identities using unique physical features.
Commonly scanned features include:
- Retina
- Fingerprint
- Face
- Heartbeat

Barcode Reader/Scanner

Devices specifically designed to scan barcodes, frequently utilized in retail settings for transaction processing.

Description

Test your knowledge on peripheral devices with these flashcards! This quiz covers key concepts, such as the categories of peripheral devices and the functionalities of keyboards. Perfect for anyone looking to enhance their understanding of computer hardware.