Unit 1.4: Computer Peripheral Devices

Peripheral Device

External hardware connected to a computer to expand functionality.

Plotter

Output device used to create large-format drawings and diagrams.

Purpose of Input Devices

Allow users to interact with applications and enter data into a system.

Purpose of Output Devices

Present processed information to users visually or physically.

USB-A

Standard rectangular connector commonly used for keyboards, mice, flash drives, and printers.

USB-C

Reversible port that supports high-speed data transfer, charging, and video output.

Micro-B

Older compact connector commonly used for older phones and external hard drives.

USB-A Limitation

Not reversible and slower than USB-C.

USB-C Benefit

Supports power delivery, data transfer, and video output in one port.

Micro-B Limitation

Fragile and slower than USB-C.

HDMI Benefit

Carries both high-definition audio and video in one cable.

HDMI Limitation

Cable length can reduce signal quality over long distances.

Warehouse Barcode Scanner

Input device because it sends scanned data into the computer system.

Why Peripheral Devices Matter

They improve productivity and allow effective interaction with computer systems.

USB-C Compared to USB-A

USB-C is faster, reversible, and supports more functions.

Why Understanding Ports Matters

Helps users choose compatible devices and troubleshoot connection issues.

Bluetooth Typical Range

Usually about 30 feet or less.

What USB-A Commonly Connects

Keyboards, mice, printers, and flash drives.

What USB-C Commonly Connects

Displays, cameras, speakers, flash drives, and charging devices.

What Makes USB-C Confusing

Some cables look identical but support different speeds and features.