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.
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Thursday, 31 August 2006 |
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The internet is a communications system that routes packets based on internet addresses. A network's protocol specifies a common set of rules and/or signals which the networked devices use to communicate with each other. Gateways offer the advantage of IP telephony by bridging between the traditional telephone network and the Internet. Network firewalls provide important safeguards for any network connected to the Internet. A network gateway act as a firewall is that filters packets and separates an Intranet from Internet. A gateway acts as the interface between proximity local area protocols and wide area protocols. The internet gateway transfers the packets to the internet where internet routers forward the packets based on the internet address. |
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Wednesday, 30 August 2006 |
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Power adapters are commonly used to supply power to electrical and electronic devices, such as laptop and notebook computers, personal digital assistants (PDA), cellular phones, digital cameras, audio recorders, compact disc (CD) players, MP3 players, portable digital video disc (DVD) players, electric toothbrushes, shavers, hand-held vacuum cleaners, radios, and telephone sets. AC adapters are used for various purposes such as the recharging of mobile phones and the converting of AC voltage into a desired AC voltage or a DC voltage. Portable electronics devices have a port for connecting to the adapter, and the port has a plurality of contacts. A power adapter is usually one of the accessories transported along with a portable electronic device. |
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Wednesday, 30 August 2006 |
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A cordless telephone refers to a phone handset in which electromagnetic radiation is utilized to carry communications to and from the handset. Cordless telephones provide greater flexibility than traditional landline phones by permitting a user to move freely and not be physically restricted by a telephone cord. The primary benefit of the cordless phone is that the handset need not be at a fixed location and need not be located close to the base unit. A typical cordless telephone is comprised of a base unit or base station and a portable handset unit which both have antennas and transceivers for communicating with each other. The handset is capable of receiving and transmitting signals over a wireless link to the base unit. Cordless telephone handsets also typically include a microphone and a speaker. |
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Tuesday, 29 August 2006 |
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The television industry is beginning to use flat panel displays to replace cathode ray tube (CRT) technologies. The cathode ray tubes also have major drawbacks such as excessive bulk and weight, fragility, high power and voltage requirements. A flat panel display is lighter and smaller than a CRT display and has a low power consumption. Because of their light weight, small footprint, relatively sharp resolution, and low power consumption, flat panel displays enjoy wide appeal as television screens, electronic game displays, computer screens, avionics or vehicular displays. A liquid crystal display has characteristics of being thin and light-weight, and low power consumption. The liquid display devices provide richer and fuller colors and higher resolutions as compared with conventional display devices. |
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Tuesday, 29 August 2006 |
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An attenuator is a device passing an input signal while operating to attenuate the signal by a precise amount. An attenuator attenuates electromagnetic energy. Attenuators are used in applications that require signal level control. There are many applications for attenuators. A microwave attenuator may be implemented as a fixed attenuator or a variable attenuator. A variable attenuator allows the level of attenuation to be adjusted. Variable waveguide attenuators are commonly used to attenuate microwave signals propagating within a waveguide. In broadband microwave amplifiers, microwave attenuators are indispensable for temperature compensation of gain variation. Voltage-controlled variable attenuators have been widely used for automatic gain control circuits. |
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Tuesday, 29 August 2006 |
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Digital signal processors are designed to process digital signals in real time using built in computational units. Digital signal processors are designed to process digital signals in real time using built in computational units. A digital signal processor (DSP) performs computations which generally require large numbers of arithmetic operations to be performed rapidly. Digital signal processing can be performed more rapidly than analog signal processing using techniques such as high-precision and stability processing, pipeline control, and parallel processing. Digital signal processors (DSPs) are becoming prevalent in the electronics industry. Digital signal processors can be found in communications devices, image processors, video processors, and pattern recognition processors. |
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Monday, 28 August 2006 |
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Electrical connectors are used to connect different electrical devices to make the electrical devices electrically connected. Electrical connectors are typically used to connect multiple electrical devices such that the electrical devices may electrically communicate. Electrical connectors are used within many systems, such as personal computers, industrial systems, networks and power supplies. A typical electrical connector includes some form of insulating or dielectric housing having an opening or receptacle for receiving a complementary mating connector or other mating connecting device. Electrical connectors are provided in many different varieties for numerous applications. Electrical connectors are widely used in personal computer systems to electrically connect a plurality of wires. |
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Electronics Information
