Provides information and reviews of electronics and electrical products, including computers, audio and video electronics, fiber optics, electronic components, RF and microwave electronics, security and alarm products, sensors and detectors, lightings and lamps, digital cameras, camcorders, cell phone, battery, printers and copiers, power supplies, optoelectronics, cables and connectors, and satellite communication products.
|
|
Friday, 17 November 2006 |
|
Users of personal computers and other digital devices have been able to engage in voice communications using these devices for many years. Voice communication over the Internet works by using the internet connection rather than the telecommunications network. In an internet communication system, analog voice signals are initially digitalized, encoded, and transmitted in forms of voice data packets by a transmitter. A receiver then receives the voice data packets sent, converts them to analog signals, and outputs the analog signals through a speaker. Calls are routed through a packet switched internet protocol network. Packet networks are more economical than circuit switched networks. VoIP technology supports audio, video, data, or fax communications using the internet protocol. |
|
Read more...
|
|
|
Thursday, 16 November 2006 |
|
A car audio system is used to produce an audio reproduction for drivers and passengers. Audio components such as an AM/FM radio, cassette player, or compact disc player are increasingly popular options on motor vehicles. Car stereos are the audio systems set in the dashboards of an automobile. Audio devices installed in a car or the like must be compact and thin due to the space limitations. A tone control unit of vehicle audio system for controlling the tone quality of the input audio signal performs equalizer control and high/low tone control. An amplifier amplifies the input audio signal. The car speaker receives the amplifier signal and produces vibrations which produce sound. Car audio systems are generally designed that the power voltage of the system is directly supplied from a car storage battery. |
|
Read more...
|
|
|
Thursday, 16 November 2006 |
|
The computer keyboard is the primary input device for the entry of commands and data into a computer system. Keyboards typically allow the user to type in letters, numbers, and commands. Keyboards have a plurality of keycaps wherein alphanumeric symbols are printed on the keycaps to help users select the desired input to the computer. A keyboard comprises a number of keyboard buttons and each keyboard button corresponds to a command. Each keyboard button corresponds to a character or a function. Wireless keyboards have a number of advantages over the wire connected keyboards employed in computer systems. In the laptop computer, a keyboard is installed at a deck case of the main body. A main board mounting various electronic circuit parts is installed inside the main body. |
|
Read more...
|
|
|
Thursday, 16 November 2006 |
|
A radio frequency (RF) switch is a device that controls the flow of an RF signal. An RF switch selectively switches the RF path from the integral antenna to the RF accessory port. In communications applications, switches are often designed with semiconductor elements such as transistors or pin diodes. PIN diodes and GaAs field effect transistors (FETs) switches typically require a bias current and have a limited frequency response. In order to reduce the size and weight of such RF switches, micro-electromechanical system (MEMS) technology has been known to be used to fabricate such switches. MEMS switches use electrostatic actuation to create movement of a beam or membrane that results in an ohmic contact or by a change in capacitance by which the flow of signal is interrupted. |
|
Read more...
|
|
|
Wednesday, 15 November 2006 |
|
Modern automotive vehicles incorporate an ever-increasing electronic devices. Among the car video devices are TV tuners, DVD (digital versatile disc) players, and car navigation systems. Passenger vehicles have television sets for viewing while riding in the passenger vehicle. These video display units are often interconnected to recording and playback devices, such as video cassette recorders and digital video disc units, so that occupants of the passenger vehicle may enjoy movies and other prerecorded programs as well as live television broadcasts. Video display screens are used in vehicles for providing information to the driver or entertainment to the passengers. Video screens used with navigation systems are typically mounted on the dashboard for providing GPS data to the driver. |
|
Read more...
|
|
|
Wednesday, 15 November 2006 |
|
A graphics card is a specialized graphics processing unit for a computer system. Graphics processing units (GPU) are commonly used in graphics systems to generate three-dimensional 3D graphics images in response to instructions from a central processing unit. A graphics processor receives primitives and textures, and from them determines the color intensity of individual pixels on the monitor. Graphics primitives may include lines, characters, areas such as triangles and ellipses, and solid or patterned shapes such as polygons, spheres, and cylinders. The typical GPU is a highly complex integrated circuit device optimized to perform graphics computations and write the results to the graphics memory. Modern computers produce graphical output using a sequence of tasks known as a graphics pipeline. |
|
Read more...
|
|
|
Wednesday, 15 November 2006 |
|
Optical fibers are commonly used for the transmission of all types of data, including telecommunications, video, and computer data. Fiber optic cables have become an alternative to conventional wire transmission. In optic communication networks, optical switches can be used in optical networks to switch light beams from input optical fibers to output optical fibers. Fiber optic switches play very important roles in advanced technologies such as telecommunications, data communications, computer interconnects, optical computing and optical signal processing. Optical switches use various mechanisms to switch light beams from an input to a selected output. Mechanical optic switch realizes switching operation by moving optic fibers or optic elements with mechanical or electromagnetic means. |
|
Read more...
|
|
|
|
<< Start < Prev 1 2 3 4 5 6 7 8 9 10 Next > End >>
|
| Results 137 - 153 of 322 |
Electronics Information
