Summary of Computer Types and Hardware Components

Types of Computers

  • Microcontrollers: Integrated circuits for specific operations, found in everyday appliances (e.g. ovens, printers).

  • Systems on Chip (SoC): Includes microprocessors (Raspberry Pi, Arduino).

Servers

  • Central computers providing services (printing, email).

  • More powerful than PCs; includes RAID systems, dual power supplies.

Mobile Computers

  • Definition: Technology enabling data transmission without physical links.

  • Categories:

    • Laptops/Notebooks/Netbooks: Battery-powered, portable, wireless connectivity.

    • Smartphones/Phablets/Tablets: Touchscreen, capable of many computer functions.

    • Wearable Computers: Devices worn on the body (e.g. smartwatches, fitness trackers).

RAM & ROM Chips

  • RAM: Volatile memory, impacts processing speed; measured in GB and MHz/GHz.

  • ROM: Non-volatile memory used for booting instructions; includes PROM, EPROM, EEPROM types.

SSDs & HDDs

  • SSDs: Fast, non-volatile storage; M.2 format for high-speed connection.

  • HDDs: Magnetic storage, require defragmentation to optimize speed.

Graphics Cards

  • Integrated GPUs: Use system RAM, suitable for general tasks.

  • Dedicated GPUs: Own RAM for high-performance graphics tasks like gaming.

Input Devices

  • Scanners: Convert physical images to digital; types include flatbed, hand-held.

  • Digital Cameras: Capture images digitally; uses memory cards for storage.

  • Biometric Devices: Identify individuals using unique biological features (e.g. fingerprints, facial recognition).

Output Devices

  • Monitors: Display devices; resolution measured in pixels.

  • Printers: Produce hard copies; 3D printers create objects layer by layer.

Storage Devices

  • Secure Digital (SD) Cards: Non-volatile memory for cameras/smartphones.

  • Network Attached Storage (NAS): Local storage for networks; functions like a private cloud.

  • Cloud Storage: Remote data storage accessible via the Internet; includes personal, private, and public types.

Troubleshooting

  • Power-On Self-Test (POST) checks hardware during boot.

  • Common issues can include beeping sounds, errors related to storage devices or hardware.

  • Suggested solutions: check connections, BIOS settings, power supply health, etc.