Input/Output Devices

Input Device.. Speakers – External to a computer, that disable the built-in speaker. They often have a low-power internal amplifier aswell. A plug and socket for a two-wire coaxial cable that is widely used to connect analog audio and video components are found on the backs of stereo amplifier.. There are also USB speakers which are powered from the 5 volts at 500 milliamps provided by the USB port, allowing about 2.5 watts of output power. Computer speakers can range widely in quality and in price. The speakers typically packaged with computer systems are small, plastic, and have a mediocre sound quality. Some computer speakers have equalization features such as bass and treble controls. Some computer displays have rather basic speakers built-in but Laptops come with integrated speakers. Restricted space available in laptops means these speakers usually produce low-quality sound.

Output Device.. Webcam – A webcam is a video camera which feeds its images in real time to a computer or computer network, often via USB or Wi-Fi. This common use as a camera for the world wide web gives the webcam its name. Popular uses include security surveillance, computer vision, video conferencing and permit computers to act as videophones. Webcams are known for their low manufacturing costs and flexibility.. making them the lowest cost form of videotelephony. They have also become the source of security and privacy issues, as some inbuilt webcams can be remotely activated via spyware.


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