Liquid Crystal Display (LCD) Monitor

Before you start Objectives: Learn what is LCD monitor, how does it work, and what are common features. Prerequisites: no prerequisites. Key terms: ratio, display, resolution, aspect, angle, hdtv, pixel, time, response, contrast, color, line, backlight, dead, black, vertical, flat, light, power LCD Features The static and dynamic contrast ratio is the difference in brightness (light intensity) between the brightest … Read more

Cathode Ray Tube (CRT) Monitor

Before you start Objectives: Learn what is CRT monitor, how does it work and what are its features. Prerequisites: Key terms: screen, color, refresh, phosphor, rate, gun, electron, green, blue, pixel, red, draw, display, horizontal, vertical, resolution, grill, mask, intensity, video, aperture CRT Monitor Design A CRT monitor is made up of several different components. The first … Read more

Different Computer Input Devices

Before you start Objectives: Learn what different input devices can we use to communicate with our computer. Prerequisites: no prerequisites. Key terms: keyboard, mouse, kvm, switch, touchscreen, connect, mechanical, optical, trackball, wireless, finger Keyboard and Mouse Typically we connect our keyboard with our PC using PS/2 or USB port. Some keyboards can be connected wirelessly via a Bluetooth, infrared (IR), … Read more

IEEE 1394 (FireWire) Interface

Before you start Objectives: Learn what is FireWire, about different FireWire connectors and about different FireWire versions. Prerequisites: no prerequisites. Key terms: device, connector, bus, data, megabits, version, transfer, cable, wire, length, interface, pin Description of FireWire FireWire can transfer data at 400 megabits per seconds. It’s can be used by external hard drives, external digital cameras, external … Read more

Universal Serial Bus (USB) Interface

Before you start Objectives: learn what is Universal Serial Bus, how can we use it, and what are usual USB connectors. Prerequisites: no prerequisites. Key terms: device, connector, hub, power, type, mini, cable, self-powered, irq, micro, pin, port, lenght Serial Bus USB eliminates the need for separate expansion boards for every device that we want to install in … Read more

PS/2 Connector

Before you start Objectives: learn what are PS/2 ports, how do they look like and why do we use them. Prerequisites: no prerequisites. Key terms: mini, din, port, connect, keyboard, mouse, pc, purple, green, case, key, usb Mini-DIN Mini-DIN connector is also called a PS/2 connector because in 1994 IBM came out with a line of computers called … Read more

Parallel Interface

Before you start Objectives: learn what is parallel interface and how does it work. Prerequisites: no prerequisites. Key terms: cable, port, data, eight, 8, wire, length, transfer, bi-directional, connector, ibm, ieee, printer, signal, standard How Does it Work With a serial interface we had a single signal traveling one bit at a time on the wire. With a parallel … Read more

Serial Interface

Before you start Objectives: learn what is serial interface and how does it work. Prerequisites: no prerequisites Key terms: com, device, port, problem, data, modem, mouse, connection, byte, printer How Does it Work Let’s say that we have two devices connected using serial connection.   Image 315.1 – Serial Connection In a serial connection, one device sends signals … Read more

Different Ways to Configure Device Resources

Before you start Objectives: Learn about three general ways in which we can configure resources for our devices. Prerequisites: you should know what are IRQs, what are DMA channels, and what are I/O addresses. Key terms: devices, device, configure, pnp, resources, switches, configuration, hardware, resource Hardware Switches On older systems and on older devices we had to manually … Read more

What are I/O Addresses (Port Addresses)

Before you start Objectives: Learn what is I/O address, what is hexadecimal notation, and default I/O port assignment. Prerequisites: no prerequisites. Key terms: address, port, system, devices, hexadecimal, bus, configured, ports, base, notation I/O Address I/O address can also be referred to as the I/O port or simply Port Address. The I/O address allows communication between devices in … Read more