|
USB Killer
A USB killer is a device that is designed to be portable and sends high-voltage power surges repeatedly into the data lines of the device it is connected to, which will damage hardware components (integrated circuits for ADC/ DAC providing transmission) on unprotected devices. Companies selling the device state it is designed to test components for protection from power surges and electrostatic discharge. Various overvoltage protection devices may be employed to make lines more resistant to high currents. Mechanism The device typically contains several capacitors and charge and discharge circuitry. When the device is connected to a USB port, the capacitors are charged from the USB port's 5volt supply. When they are fully charged, the device discharges them through step-up circuitry, which delivers a high voltage back into the USB port. Versions of the device have been reported to deliver a pulse of around negative 200V. This greatly exceeds the normal voltage the USB host ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog To Digital Converter
In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input voltage or current to a digital number representing the magnitude of the voltage or current. Typically the digital output is a two's complement binary number that is proportional to the input, but there are other possibilities. There are several ADC architectures. Due to the complexity and the need for precisely matched components, all but the most specialized ADCs are implemented as integrated circuits (ICs). These typically take the form of metal–oxide–semiconductor (MOS) mixed-signal integrated circuit chips that integrate both analog and digital circuits. A digital-to-analog converter (DAC) performs the reverse function; it converts a digital signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mains Electricity
Mains electricity, utility power, grid power, domestic power, wall power, household current, or, in some parts of Canada, hydro, is a general-purpose Alternating current, alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electrical grid in many parts of the world. People use this electricity to power everyday items (such as domestic appliances, televisions and lamps) by plugging them into a wall outlet. The voltage and utility frequency, frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz. Travellers' portable appliances may be inoperative or damaged by foreign electrical supplies. Non-interchangeable AC power plugs and sockets, plugs and sock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NDTV India
NDTV India (styled as NDTV इंडिया) is an Indian Hindi-language news channel, owned by NDTV. The channel was launched on 15 April 2003, along with its English counterpart, NDTV 24×7, after the end of the partnership with Disney Star, providing the news content for its Star News channel. In June 2016, NDTV decided to launch two separate channels called NDTV India and NDTV Spice in the United Kingdom. History NDTV was the brainchild of its chairman, Prannoy Roy, and his wife and managing director, Radhika Roy. In 1988, NDTV produced the news and current affairs show ''The World This Week'' for the national service broadcaster, Doordarshan. The show proved to be popular and NDTV established its image as a private news producer. It moved on to become the sole news content provider and producer for India’s first 24-hour news channel, Star News. On 15 April 2003, they launched two 24-hour news channels— NDTV 24x7 in English and NDTV India in Hindi. Telecast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albany, New York
Albany ( ) is the List of capitals in the United States, capital city of the U.S. state of New York (state), New York. It is located on the west bank of the Hudson River, about south of its confluence with the Mohawk River. Albany is the oldest city in New York, and the county seat of and most populous city in Albany County, New York, Albany County. Albany's population was 99,224 at the 2020 United States census, 2020 census and estimated at 101,228 in 2023. The city is the economic and cultural core of New York State's Capital District (New York), Capital District, a metropolitan area including the nearby cities and suburbs of Colonie, New York, Colonie, Troy, New York, Troy, Schenectady, New York, Schenectady, and Saratoga Springs, New York, Saratoga Springs. With a population of 1.23 million in 2020, the Capital District is the third-most populous metropolitan region in the state. The Hudson River area was originally inhabited by Algonquian languages, Algonquian-speaking Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
College Of Saint Rose
The College of Saint Rose was a private college in Albany, New York. It was founded in 1920 by the Sisters of St. Joseph of Carondelet as a Catholic women's college, and it became fully co-educational in the 1969–1970 academic year. The following year, the college added laypersons to its board and became an independent college sponsored by the Sisters of St. Joseph. The college was located in the Pine Hills neighborhood of Albany. It was a Division II member of the National Collegiate Athletic Association (NCAA). In June 2023, after many years of financial difficulties, the college's accreditor, the Middle States Commission on Higher Education, publicly warned the college that it was in danger of losing its accreditation. The college closed in June 2024. History The idea for The College of Saint Rose was conceived by Monsignor Joseph A. Delaney, the vicar general of the Roman Catholic Diocese of Albany, in 1920. Delaney contacted Sister Blanche Rooney, a member of the lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spark Gap
A spark gap consists of an arrangement of two Conductor (material), conducting electrodes separated by a gap usually filled with a gas such as air, designed to allow an electric spark to pass between the conductors. When the potential difference between the conductors exceeds the breakdown voltage of the gas within the gap, a electric spark, spark forms, Ionization, ionizing the gas and drastically reducing its electrical resistance. An electric current then flows until the path of ionized gas is broken or the current reduces below a minimum value called the "holding current". This usually happens when the voltage drops, but in some cases occurs when the heated gas rises, stretching out and then breaking the wiktionary:filament, filament of ionized gas. Usually, the action of ionizing the gas is violent and disruptive, often leading to sound (ranging from a ''snap'' for a spark plug to thunder for a lightning discharge), light, and heat. Spark gaps were used historically in e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royer Oscillator
A Royer oscillator is an electronic relaxation oscillator that employs a saturable-core transformer in the main power path. It was invented and patented in April 1954 by Richard L. Bright & George H. Royer, who are listed as co-inventors on the patent. It has the advantages of simplicity, low component count, rectangle waveforms, and transformer isolation. As well as being an inverter, it can be used as a galvanically-isolated DC-DC converter when the transformer output winding is connected to a suitable rectifying stage, in which case the resulting apparatus is usually called a "Royer Converter". It has some disadvantages, the most notable being that its output voltage (both amplitude and frequency thereof) is strongly dependent on the input voltage, and this cannot be overcome without significant changes to the original design as patented by Royer. The other disadvantage is that the power loss in the transformer can be very significant since it must operate at its maxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluorescent Lamp
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow. Fluorescent lamps convert electrical energy into visible light much more efficiently than Incandescent light bulb, incandescent lamps, but are less efficient than most LED lamps. The typical luminous efficacy of fluorescent lamps is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output (e.g. the luminous efficacy of an incandescent lamp may only be 16 lm/W). Fluorescent lamp fixtures are more costly than incandescent lamps because, among other things, they require a electrical ballast, ballast to regulate Electric current, current through the lamp, but the initial cost is offset by a much lower running cost. Compact fluorescent lamps (CFL) made in the same sizes a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camera Flash
A flash is a device used in photography that produces a brief burst of light (lasting around of a second) at a color temperature of about 5500 K to help illuminate a scene. The main purpose of a flash is to illuminate a dark scene. Other uses are capturing quickly moving objects or changing the quality of light. ''Flash'' refers either to the flash of light itself or to the electronic flash unit discharging the light. Most current flash units are electronic, having evolved from single-use flashbulbs and flammable powders. Modern cameras often activate flash units automatically. Flash units are commonly built directly into a camera. Some cameras allow separate flash units to be mounted via a standardized accessory mount bracket (a '' hot shoe''). In professional studio equipment, flashes may be large, standalone units, or studio strobes, powered by special battery packs or connected to mains power. They are either synchronized with the camera using a flash synchronization cab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Independent
''The Independent'' is a British online newspaper. It was established in 1986 as a national morning printed paper. Nicknamed the ''Indy'', it began as a broadsheet and changed to tabloid format in 2003. The last printed edition was published on Saturday 26 March 2016, leaving only the online edition. The daily edition was named National Newspaper of the Year at the 2004 British Press Awards. ''The Independent'' won the Brand of the Year Award in The Drum Awards for Online Media 2023. History 1980s Launched in 1986, the first issue of ''The Independent'' was published on 7 October in broadsheet format.Dennis Griffiths (ed.) ''The Encyclopedia of the British Press, 1422–1992'', London & Basingstoke: Macmillan, 1992, p. 330. It was produced by Newspaper Publishing plc and created by Andreas Whittam Smith, Stephen Glover and Matthew Symonds. All three partners were former journalists at ''The Daily Telegraph'' who had left the paper towards the end of Lord Hartwell' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modular Connector
A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. Probably the best-known applications of modular connectors are for telephone and Ethernet. Accordingly, various electronic interface specifications exis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southbridge (computing)
In computing, a southbridge is a component of a traditional two-part chipset architecture on motherboards, historically used in personal computers. It works alongside the northbridge to manage communications between the central processing unit (CPU) and lower-speed peripheral interfaces. The northbridge typically handled high-speed connections such as RAM and GPU interfaces, while the southbridge managed lower-speed functions. The southbridge controls a range of input/output (I/O) functions, including USB, audio, firmware (e.g., BIOS or UEFI), storage interfaces such as SATA, NVMe, and legacy PATA, as well as buses like PCI, LPC, and SPI. Southbridge and northbridge components were often designed to work in pairs, though there was no universal standard for interoperability. In the 1990s and early 2000s, they commonly communicated via the PCI bus; more recent chipsets use Direct Media Interface (Intel) or PCI Express (AMD). Intel referred to its southbridge as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
