Chapter3_Part_2_Evaluating Hardware-v1

Chapter 3 Part II: Evaluating Hardware

Objectives

  • Explain considerations for purchasing technology devices

  • Describe characteristics and uses of input and output devices

  • Evaluate hardware

  • Prevent and troubleshoot hardware theft or failure

  • Distinguish among internal, external, and cloud-based storage

  • Describe network hardware

  • Explain uses of cases, motherboard components, processors, and ALU

  • Discuss ways to prevent health-related injuries from technology use

  • Identify responsible e-waste disposal techniques

Mobile Computer Buyer’s Guide

  • Research mobile computer manufacturers before purchasing.

  • Determine suitable form factor:

    • Tablets/ultrathin laptops for portability

    • Traditional laptops for more ports and capabilities

  • Choose an appropriate screen size:

    • Laptops (11–17 inches), Tablets (7–12 inches)

  • Experiment with keyboards and pointing devices for comfort.

  • Consider processor, memory, and storage upgrades at purchase.

  • Ensure availability of ports for accessories (USB, monitors).

  • If using for long periods, consider extra battery/power pack.

  • Use a padded ergonomic carrying case for protection.

  • Confirm compatibility with external displays and projectors.

Input and Output Devices

  • Input Devices: Provide data/instructions to a computer (e.g., keyboard, touchscreen).

  • Output Devices: Convey processed information to the user (e.g., display monitor, speakers).

  • Input examples: mouse, stylus, scanner; Output examples: projectors, printers.

How Computers Represent Data

  • Most computers operate using a binary system (0 and 1).

  • Bits: Smallest unit of data; 8 bits = 1 byte (represents a character).

  • ASCII and Unicode are coding schemes for characters.

Maintain Computer Hardware

  • Regular maintenance is necessary for performance and longevity.

  • Turn off devices before maintenance, and consider battery removal for laptops.

  • Recommendations include:

    • Clean screens with a damp cloth.

    • Use compressed air for keyboard cleaning.

    • Keep air vents clear of dust.

    • Avoid extreme temperatures for devices.

    • Use surge protectors to prevent damage from power fluctuations.

Perform Data Backups

  • Regular data backups prevent data loss (hardware failure, cyberattack).

  • Utilize online backup services for automatic data uploads.

  • Alternatives include manual backups to external devices.

Storage Solutions

  • Internal Hard Drives: Main storage medium (HDD or SSD).

  • External Hard Drives: Portable; connect via USB for additional storage.

  • Optical Media: CDs, DVDs, declining in use.

  • Cloud Storage: Remote storage accessible via the internet.

Protecting Health

  • Risks of RSI from prolonged technology use; affects muscles/nerves.

  • Symptoms include cramping, numbness, pain; commonly due to improper technique or posture.

  • Ergonomics can help prevent injuries; consider standing desks and proper screen height.

  • Behavioral risks include technology addiction and social withdrawal.

  • Cyberbullying and cyberstalking pose significant social health threats.

Dispose of Hardware Responsibly

  • E-waste contains toxic metals; responsible disposal is crucial to prevent environmental harm.

  • Methods include recycling, donating, or trading in old devices.

  • Ensure proper disposal practices to prevent exporting e-waste to developing countries.

  • Follow sustainable practices: buy green, recycle equipment, donate functional items.

Manage Power for Mobile Devices

  • Configure power management settings to extend battery life.

  • Recommendations may include dimming the display after inactivity and closing unused apps.