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Electrical outlet

An electrical outlet or receptacle is a socket that connects an electrical device to an electricity supply. In buildings, electrical outlets are usually installed in the wall, although they can also be installed in the floor. Occasionally, they a ...

Knob and tube wiring

Knob and tube wiring was an early type of electrical wiring. It was commonly used from the 1880s to the early 1940s, and is occasionally, but very rarely, still used today. In knob and tube wiring, wires were held to the wooden structure by ceram ...

Field-programmable gate array

A Field-programmable gate array is an electronic component used to build reconfigurable digital circuits. That means that an FPGA is different from a logic gate, because a logic gate has a fixed function. In contrast an FPGA has an undefined func ...

Integrated circuit

An integrated circuit is a piece of specially prepared silicon into which an electronic circuit is etched using photolithography. Silicon chips can contain logic gates, computer processors, memory and special devices. The chip is very fragile and ...

Logic gate

A logic gate is an electronic component that can be used to conduct electricity based on a rule. The output of the gate is the result of applying this rule to one or more "inputs". These inputs may be two wires or the output of other logic gates. ...

Electronic component

An electronic component is a basic electronic element. These components can be connected together to make circuits. Components can be single items or in more or less complex groups as integrated circuits.

Capacitor

A capacitor is an electronic device that stores electric energy. It is similar to a battery, but can be smaller, lightweight and a capacitor charges or discharges much quicker. Capacitors are used in many electronic devices today, and can be made ...

Cathode ray tube

The cathode ray tube or CRT was invented by Karl Ferdinand Braun. It was the most common type of display for many years. It was used in almost all computer monitors and televisions until LCD and plasma screens started being used. A cathode ray tu ...

Diode

A diode is an electronic component with two electrodes that allows electricity to go through it in one direction and not the other direction. Diodes can be used to turn alternating current into direct current Diode bridge. They are used in power ...

Doorbell

A doorbell is a device which is typically installed to or near a door. When a visitor presses a button, the bell rings inside the building, alerting the presence of the visitor.

Heterojunction bipolar transistor

The heterojunction bipolar transistor is a type of bipolar junction transistor which uses different semiconductor materials for the emitter and base regions, making a heterojunction. The HBT can handle signals of much higher frequencies, than BJT ...

Induction coil

An induction coil or "spark coil" is a type of electrical transformer. It is used to produce high-voltage pulses from a low-voltage direct current supply. To create the flux changes necessary to induce voltage in the secondary coil, the direct cu ...

Inductor

An inductor is an electrical device used in electrical circuits because of magnetic charge. An inductor is usually made from a coil of conducting material, like copper wire, that is then wrapped around a core made from either air or a magnetic me ...

Itanium

Itanium is a type of Intel microprocessors with 64-bit chip architecture. Itanium processors are sometimes used today for servers. Itanium processors where originally designed by HP and Intel with Intel making producing them, and several manufact ...

Light-emitting diode

A light-emitting diode is a semiconductor device that produces light from electricity. LEDs last a long time and do not break easily. They can produce many different colors. They are efficient - most of the energy turns into light, not heat. An L ...

Mercury-arc rectifier

A Mercury-arc rectifier is a type of rectifier used for converting alternating current to direct current. The cathode is made from a pool of liquid mercury. Mercury-arc rectifiers were rugged and durable. They could carry higher currents than mos ...

Metal rectifier

A metal rectifier is an early type of semiconductor rectifier in which the semiconductor is copper oxide or selenium. They were used to convert alternating current to direct current. They were often used in devices such as radios and battery char ...

Microprocessor

A microprocessor is an electronic component that is used by a computer to do its work. It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes t ...

MOSFET

A MOSFET is an electronic component that acts as an electrically-controlled switch. MOSFET stands for metal-oxide-semiconductor field-effect transistor. Transistors are small electrical devices that are used in, amongst other things, alarm clocks ...

N-type semiconductor

An N-type semiconductor is a type of material used in electronics. It is made by adding an impurity to a pure semiconductor such as silicon or germanium. The impurities used may be phosphorus, arsenic, antimony, bismuth or some other chemical ele ...

Organic light-emitting diode

Organic light-emitting diode is a type of light-emitting diode. The part of the OLED that creates light is made of a very thin layer of organic compounds. The main use of OLED technology is for flat panel displays for smartphones and other mobile ...

P-type semiconductor

A p-type semiconductor is a type of semiconductor. When the trivalent impurity is added to an intrinsic or pure semiconductor, it is said to be a p-type semiconductor. Trivalent impurities such as boron, gallium, indium, aluminium etc. are called ...

Potentiometer

Potentiometers are variable resistors. Potentiometers are resistors where the resistance can be changed using a knob or a slider. Potentiometers are used to control many things, including how bright or dim the lights in your house are and the vol ...

Resistor

A resistor limits the electric current that flows through a circuit. Resistance is the restriction of current. In a resistor the energy of the electrons that pass through the resistor are changed to heat and/or light. For example, in a light bulb ...

Silicon controlled rectifier

Silicon controlled rectifier is a type of thyristor. It is a four-layer solid-state current-controlling device. SCRs are unidirectional devices: they conduct current only in one direction. Normally, SCRs can be triggered only by currents going in ...

Solar cell

Solar cells have many applications. They have long been used in situations where electrical power from the grid is unavailable, such as in remote area power systems, Earth-orbiting satellites and space probes, consumer systems, e.g. handheld calc ...

Switch

A switch is something that changes the flow of an electrical circuit. The most common kind of switch is something which can be taken off of one course and put onto another. The term "switch" usually means electrical power. In applications where m ...

Transistor

A transistor is an electronic component that can be used as part of an amplifier, or as a switch. It is made of a semiconductor material. Transistors are found in most electronic devices. The transistor was a major advancement after the triode tu ...

Triode

A triode is a type of empty tube with wires in it. It is not a vacuum tube diode, which has only two wires, but has a third electrode, called the grid between the 2 wires and anode).

Vacuum tube

A vacuum tube, also called a valve in British English, is an electronic device used in many older model radios, television sets, and amplifiers to control electric current flow. The cathode is heated, as in a light bulb, so it will emit electrons ...

Video camera tube

The video camera tube was a type of vacuum tube used to capture television images between the 1930s and 1980s. A video camera tube uses a lens to focus the image on a photoelectric material a material which emits electrons when light hits it hous ...

AOC International

AOC International is a Taiwanese electronics company. It is based in Taipei and manufactures displays like computer monitors and televisions. It is a subsidiary from TPV Technology.

Fujifilm

Fujifilm Holdings Corporation or Fujifilm is a Japanese company that makes cameras, video and photo film, medical equipment and biotechnology. The company also produces medical equipment, consumables for the film industry, computers and other goo ...

NEC

NEC Corporation is a Japanese multinational provider of information technology services and products. It is headquartered in Minato, Tokyo, Japan. It provides IT and network solutions to businesses, communications services providers and to govern ...

Nokia

In 2011, Nokia and Microsoft began a partnership which created Nokia Lumia, a series of smartphones that use the Windows Phone operating system and was meant to replace Symbian as the OS on Nokias smartphones. Not many of these phones were sold a ...

OnePlus

OnePlus Technology is a Chinese company who makes smartphones, headphones, and backpacks. OnePlus was made in 2013 by Pete Lau and Carl Pei. Carl Pei left in October of 2020 to "pursue new ventures" and to "take some time to decompress and spend ...

Sprint Corporation

Sprint Nextel Corporation was a telecommunications company based in Overland Park, Kansas. It operated under the name Sprint, and was once the fourth largest wireless telecommunications network in the United States behind Verizon, AT&T and T- ...

Taito Corporation

The Taito Corporation is an innovator of coin operated video games. Taito was founded in 1953 to import peanuts and vodka to Japan. They also made vending machines for the vodka and peanuts. The next year, Taito began making jukeboxes and other a ...

Xiaomi

Xiaomi Corporation) is a Chinese multinational electronics company founded in April 2010 and headquartered in Beijing. Xiaomi makes and invests in smartphones, mobile apps, laptops, home appliances, bags, shoes, consumer electronics, and many oth ...

Zenith Electronics

Zenith Electronics is an American research and development company. It develops Advanced Television Systems Committee standards and digital rights management technologies. It is owned by the South Korean company LG Electronics. Zenith was earlier ...

Magnetic tape

Magnetic tape is a long and narrow strip of plastic that thin magnetic material is coated on. Nearly all recording tape is of this type, whether used for recording audio or video or computer data storage. Magnetic tape recording uses magnetic tap ...

8 track tape

The 8-track is a music format which first appeared in the 1960s. It is a tape format which was created so people could play music in their cars. Unlike cassettes, 8 tracks are a continuous loop of tape. They did not need to be turned over to keep ...

Reel-to-reel tape recorders

Reel-to-reel tape recorders were used during the 20th century, mostly in professional studios from the 1940’s and quickly spread into people’s homes in the 1950s and 1960s. The biggest popularity was in the 1970s, probably because people needed h ...

Radio

Radio is a way to send electromagnetic signals over a long distance, to deliver information from one place to another. A machine that sends radio signals is called a transmitter, while a machine that "picks up" the signals is called a receiver or ...

Amateur radio

Amateur radio is a hobby for people who like to talk using radio transmitters. Many people enjoy using amateur radio to talk to other amateur radio hobbyists in other countries. Amateur radio hobbyists also use their radio transmitters to get hel ...

Arecibo message

The Arecibo message was a short radio message sent into space to celebrate the remodeling of the Arecibo radio telescope in Puerto Rico in 1974. It was aimed at the globular star cluster M13, about 25.000 light years from Earth. M13 was chosen be ...

BandNews FM

Radio BandNews FM is a Brazilian all news radio network. It first started in 20 March 2005. It is owned by Grupo Bandeirantes de Comunicação. The network started broadcasting at exactly midnight in 20 March 2005, after at 23:59, Radio Cidade said ...

Christian radio

Christian radio is a kind of radio station that has mostly Christian programs. Some Christian radio stations play Christian music. Some Christian radio stations have talk or news programs.

Citizens band radio

Citizens band radio is, in many countries, a system of short-distance radio communications between individuals on a selection of 40 channels within the 27 MHz band. Citizens band not the same as the Amateur Radio Service which has a much longer r ...

Indestructible Records

The Indestructible Record Company was started in 1906 by William Messer, who used to work for Thomas Lambert, the inventor of plastic cylinder records. They started making 4-minute cylinders in 1909. In the 1910s they started dubbing cylinder mas ...