Computer output devices are an important part of every computer. Computer hardware and software are the two main components of a computer system, which is used to perform computations or other tasks. The hardware consists of the physical parts that make up the computer, such as the central processing unit (CPU), memory chips, hard disk drives, graphics cards, etc. Below are some computer output devices.
A monitor is an electronic visual display device. It can be attached directly to a personal computer or it may be part of a larger display system. Monitors are usually flat-panel displays with a resolution of 1024×768 pixels or higher. They have a wide viewing angle and high contrast ratio, making them suitable for use in both home and office environments. Most monitors also include speakers and a video port for connecting external audio/video equipment. Some monitors can be connected to each other using VGA cables.
A printer is a peripheral device that produces text and images on paper or another printable medium by applying ink, dye, pigment, toner, wax, or similar substances to its surface. Printers come in many different forms including desktop printers, laptop printers, networked printers, and mobile printing devices. Desktop printers are typically large and stationary, while laptop printers are small and portable. Networked printers allow users to access shared resources from any location via a local area network (LAN) or a wide area network (WAN). Mobile printing devices allow users to print documents wirelessly from their computers.
Speakers are electroacoustic transducers that convert electric current into sound waves. There are several types of speakers: cone speakers, dome tweeters, horn drivers, ribbon tweeters, planar magnetic speakers, piezoelectric speakers, and electrodynamic speakers. Cone speakers produce sound through the vibration of a thin membrane called a diaphragm. Dome tweeters designs reproduce low frequencies. Horn drivers are designed to reproduce mid-range frequencies. Ribbon tweeters are designed to produce high frequencies. Planar magnetic speakers are designed to reproduce midrange frequencies. Piezoelectric speakers are designed to reproduce low and mid-frequency sounds. Electrodynamic speakers are designed to reproduce mid and high frequency sounds.
Headphones are small earpieces that you wear over or around the ears. They transmit sound vibrations to the eardrum. Headphones are commonly for listening to music, watching movies, playing games, and communicating on a phone call.
Earbuds are small headphones that fit inside the ear canal. You use them when listening to music or talking on a phone call. The most common form of earbud is the “ear bud” style, which fits snugly within the ear canal. Other styles include the “over-the-ear” style, which sits outside the ear canal but still covers the ear; and the “in-the-canal” style, which goes deep enough to touch the eardrum.
Braille readers are special handheld devices that translate braille characters into English alphabetic letters. Each letter is shown by one dot at a specific point along the edge of a high emboss plastic plate. The dots are always in six columns across, five rows down. The user touches the appropriate spot on the screen with his finger, then presses a button to hear the corresponding letter.
Projectors use an image generator to project light onto a reflective surface such as a wall or a screen. This causes the reflected light to appear brighter than it would if the projector were not present. Projectors can be either front projection or rear projection. Front projection uses a mirror to reflect the projected image toward the audience. Rear projection projects the image directly onto the wall or screen using a lens system. Some projectors have both front and rear projections.
A sound card is a piece of computer hardware that converts digital audio signals into analogue electrical signals suitable for driving loudspeakers. It may also provide other functions such as MIDI support, USB interface, and video capture. Most sound cards contain two channels of analogue output, although some models offer more.
Video cards are special computers that perform graphics processing tasks. These tasks usually involve converting data from a raster format (such as ASCII text) into a vector graphic format (such as PostScript), scaling images, rotating them, applying filters to them, etc. Graphics cards are part of all modern personal computers.
Speech generating device
Speech generating devices are electronic devices that allow people who are blind or visually impaired to read aloud documents, emails, web pages, and other information via their cell phones, tablets, laptops, and desktop computers.
The above list of items are essential for a great experience with the use of your computer. A computer without these items will not work properly. You should make sure you have everything listed above before purchasing your next computer.