Get it on Google Play
New! Download Unionpedia on your Android™ device!
Faster access than browser!


Index Relay

A relay is an electrically operated switch. [1]

404 relations: A Symbolic Analysis of Relay and Switching Circuits, Acronyms and abbreviations in avionics, Alexander Stepanovich Popov, Algorithm, American Railway Engineering and Maintenance-of-Way Association, Amplifier, Analogue switch, Analytical Engine, ANSI device numbers, Apollo Guidance Computer, Arc-fault circuit interrupter, Armature (electrical engineering), Arnd Peiffer, ARRA (computer), Arteche Group, Atanasoff–Berry computer, Athletics at the 1960 Summer Olympics – Men's 4 × 100 metres relay, Athletics at the 1960 Summer Olympics – Men's 4 × 400 metres relay, Athletics at the 1960 Summer Olympics – Women's 4 × 100 metres relay, Aurizon electric locomotives, Australia at the World Championships in Athletics, Autogas, Automatic block signaling, Automatic test equipment, Automatic test switching, Automation, Avnet, BARK (computer), Basler Electric, Battery isolator, Bert Bolle Barometer, BESK, Bhim Rao Ambedkar College, Bhimsen Thapa, Bifilar coil, Bimetallic strip, Bit, Bobbin, Body control module, Borescope, British Rail Class 74, Brushed DC electric motor, Buchholz relay, Building automation, Burmester Audiosysteme, Business telephone system, Buzzer, Calculator, CALDIC, Catherine Hardy Lavender, ..., Cathode ray tube, Central Power Research Institute, Central processing unit, CER Computer, Charles Adler Jr., Cherry Valley O-scale, Circuit breaker, CircuitLogix, Clapham Junction rail crash, Claude Shannon, CMOS, Coil winding technology, Collective routing, Colossus computer, Communications system, Compact controller, Computer, Computer-based interlocking, Connectivity exchange, Contact protection, Contactor, Contesting technology, Control system, Cross-country skiing (sport), Cryptanalysis of the Lorenz cipher, Damper (flow), Dashpot, Data I/O, DC connector, Dean Corll, Delay line memory, Digifant engine management system, Digital electronics, Digital protective relay, DIN 72552, DIN rail, Diode, Dispatcher training simulator, Distributed operating system, Doncaster PSB, Double switching, Dry contact, Dual in-line package, Earth leakage circuit breaker, Edward Davy, Electric bell, Electrical contacts, Electrical telegraph, Electricity meter, Electromagnet, Electromechanics, Electronic component, Electronic gear-shifting system, Electronic symbol, Electronics, Electronics Technician distance education program, Emergency light, ENIAC, ER2 electric trainset, Ernst Reiter, Failure of electronic components, Fascination (game), Field magnet, Field-effect transistor, Finite-state machine, First Draft of a Report on the EDVAC, Fixed-point ocean observatory, Flip-flop (electronics), Floating-point arithmetic, Flyback diode, FR-4, FRABA, Francisco Stromp, Friden Flexowriter, FS Class E.636, FS Class E.656, Gábor Kornél Tolnai, Geniac, George Boole, George Stibitz, Gilbert Vernam, Glidcop, Glossary of electrical and electronics engineering, Grace Hopper, Grant Building, H bridge, Harvard Mark I, Harvey mannequin, Harwell CADET, Harwell computer, Hawthorne effect, Health and Sports Day, Heath Robinson (codebreaking machine), Hengstler GmbH, Hesselberg, High voltage interface relays, History of computing hardware, History of mobile phones, History of numerical control, Holography, Homebuilt computer, Homebuilt machines, IBM 1620, IBM 305 RAMAC, IBM 407, IBM 557, IBM 6400 Series, IBM SSEC, ICT 1301, IMDT, Immobiliser, Index of electrical engineering articles, Index of electronics articles, Industrial control system, Inertial switch, Information technology, Instrumentation, Intelsat IV F-1, Intelsat IV F-2, Intelsat IV F-4, Intelsat IV F-5, Intelsat IV F-6, Intelsat IV F-7, Intelsat IV F-8, Interlocking, Invention of the integrated circuit, James W. Bryce, Jarlsberg Tunnel, Jim Kelley Amplifiers, John Kennedy College, Joseph Henry, Keypunch, Killer poke, Knife switch, Konrad Zuse, Korndörfer autotransformer starter, Kristen Heiss, KW-26, Ladder logic, Lagardère Group, Language lab, Latch (disambiguation), Latching switch, Lens Controller, Leslie speaker, Light switch, Lighting control system, Limit switch, LINC-8, Link 22, List of acronyms: N, List of computer term etymologies, List of European Aquatics Championships medalists in swimming (men), List of European Aquatics Championships medalists in swimming (women), List of International Electrotechnical Commission standards, List of inventors, List of vacuum tube computers, List of vacuum tubes, Live: Sadler's Wells, Logic gate, Magnetic circuit, Magnetic starter, Magnetism, Märklin Digital, Mechanical Engineering Heritage (Japan), Media in Atlanta, Megger Group Limited, Mercury relay, Mercury switch, Mercury-Redstone 1, Metaphorical extension, Microcontroller, Minivac 601, Mobile incinerator, Motor controller, Motorola MC14500B, Motorola Minitor, Multi Rolle Radio, Multiway switching, Muni Metro, Music sequencer, NEMA contact ratings, New York Transit Museum, Nominal impedance, Non-dim circuit, Nonblocking minimal spanning switch, North American railroad signals, North Sea Mine Barrage, Northern Barrage, NSI-63, Number One Electronic Switching System, Omron, On-board data handling, Open collector, OpenSafety, Opto 22, Otylia Jędrzejczak, Passive infrared sensor, Passivity (engineering), Phoenix Contact, PID controller, Pinball, Plugboard, Power-system protection, Pre-charge, Principles of Electronics, Productivity improving technologies, Programmable logic controller, Programmable thermostat, Protective relay, Public safety answering point, Pull-up resistor, Pulse-address multiple access, QSK operation (full break-in), Qualitrol, R. E. B. Crompton, RaceCam, Radio control, Radio receiver, Radio-controlled model, Raelene Boyle, Railway signal, Railway signalling, Railway slide fence, Random-access memory, Real Time Digital Simulator, Reed receiver, Reed relay, Reference designator, Relaxation oscillator, Relay, Relay (disambiguation), Relay logic, Release time (telecommunication), Repeater, Retrotronics, Revox, Rhine–Main–Danube Canal, Ringdown, Robert Hope-Jones, Robert W. Lucky, Robin Armstrong, Robosquirrel, Royal Radar Establishment Automatic Computer, RY, Safety instrumented system, Safety relay, Samuel Morse, SAPO (computer), Satellite modem, SBB-CFF-FFS Be 4/6 12302, Schafer automation system, Schleicher Electronic, Schweitzer Engineering Laboratories, Scoreboard, September 9, Sergey Ustiugov, Simon (computer), Ski-orienteering, Slate, Snubber, Solar transit, Solenoid, Solid State Interlocking, Solid-state electronics, Solid-state relay, Spark-gap transmitter, Stack light, Starter (engine), Starter solenoid, Static relay, Stepping switch, Stop action magnet, Struthers-Dunn, Subaudible tone, Subcarrier, Super Bowl XLVII, Swedish Board for Computing Machinery, Swimming (sport), Switch, Switching circuit theory, Sydenham rail disaster, Synchronization (alternating current), Synchronous Data Link Control, Tabulating machine, Tail lift, Tech Model Railroad Club, Technological singularity, Telegraph sounder, Telemeter, Telenor Maritim Radio, Telephone exchange, Tennis for Two, Terminal equipment, Thermistor, Thermostat, Through-hole technology, Thyratron, Time switch, Timeline of computing hardware before 1950, Timeline of electrical and electronic engineering, Timeline of electromagnetism and classical optics, Timeline of historic inventions, Timeline of United States inventions (before 1890), Timer, Track circuit, Tradesman, Traffic light control and coordination, Transmission gate, Transmission Voie-Machine, Trembler coil, TRIAC, TTI, Inc., Tube socket, ULN2003A, Union Switch & Signal, Unit record equipment, University of Western Ontario Faculty of Engineering, UTEC, Utilization categories, Vacuum tube, Vibrator (electronic), Virtual sensor network, Vista Ridge Tunnels, Vladimir Igorevich Gurevich, Voltage regulator, Voltage-sensitive relay, Wedge base, WGTV, Whisker (metallurgy), White matter, Wigwag (railroad), Wire spring relay, Women's Little 500, Wrexham-Rhos transmitting station, Wrong-side failure, WUBL, X10 (industry standard), Xi'an Y-20, Yaesu FT-221, Yokomo YZ-834B, Z11 (computer), Z2 (computer), Z3 (computer), Zone valve, 1835 in science, 1940 in science, 1945 in the United States, 1947, 1947 in science, 19th century, 2006 in Canada, 2012 India blackouts, 7-1-1. Expand index (354 more) »

A Symbolic Analysis of Relay and Switching Circuits

A Symbolic Analysis of Relay and Switching Circuits is the title of a master's thesis written by computer science pioneer Claude E. Shannon while attending the Massachusetts Institute of Technology (MIT) in 1937.

New!!: Relay and A Symbolic Analysis of Relay and Switching Circuits · See more »

Acronyms and abbreviations in avionics

This is a list of the acronyms and abbreviations used in avionics.

New!!: Relay and Acronyms and abbreviations in avionics · See more »

Alexander Stepanovich Popov

Alexander Stepanovich Popov (sometimes spelled Popoff; Алекса́ндр Степа́нович Попо́в; –) was a Russian physicist who is acclaimed in his homeland and some eastern European countries as the inventor of radio.

New!!: Relay and Alexander Stepanovich Popov · See more »


In mathematics and computer science, an algorithm is an unambiguous specification of how to solve a class of problems.

New!!: Relay and Algorithm · See more »

American Railway Engineering and Maintenance-of-Way Association

The American Railway Engineering and Maintenance-of-Way Association (AREMA) is a North American railway industry group.

New!!: Relay and American Railway Engineering and Maintenance-of-Way Association · See more »


An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).

New!!: Relay and Amplifier · See more »

Analogue switch

The analogue (or analog) switch, also called the bilateral switch, is an electronic component that behaves in a similar way to a relay, but has no moving parts.

New!!: Relay and Analogue switch · See more »

Analytical Engine

The Analytical Engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage.

New!!: Relay and Analytical Engine · See more »

ANSI device numbers

In the design of electrical power systems, the ANSI standard device numbers (ANSI /IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations) identifies the features of a protective device such as a relay or circuit breaker.

New!!: Relay and ANSI device numbers · See more »

Apollo Guidance Computer

The Apollo Guidance Computer (AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo Command Module (CM) and Lunar Module (LM).

New!!: Relay and Apollo Guidance Computer · See more »

Arc-fault circuit interrupter

An arc-fault circuit interrupter (AFCI) also known as an arc-fault detection device (AFDD) is a circuit breaker that breaks the circuit when it detects an electric arc in the circuit it protects to prevent electrical fires.

New!!: Relay and Arc-fault circuit interrupter · See more »

Armature (electrical engineering)

In electrical engineering, an armature is the power-producing component of an electric machine.

New!!: Relay and Armature (electrical engineering) · See more »

Arnd Peiffer

Arnd Peiffer (born 18 March 1987) is a German biathlete.

New!!: Relay and Arnd Peiffer · See more »

ARRA (computer)

The ARRA (for "Automatische Relais Rekenmachine Amsterdam", Automatic Relay Calculator Amsterdam) was the first Dutch computer, and was built from relays for the Dutch Mathematical Centre (Dutch: Mathematisch Centrum), which later became the Centrum Wiskunde & Informatica (CWI).

New!!: Relay and ARRA (computer) · See more »

Arteche Group

Arteche is a multinational corporation headquartered in Mungia, Basque Country (Spain).

New!!: Relay and Arteche Group · See more »

Atanasoff–Berry computer

The Atanasoff–Berry Computer (ABC) was the first automatic electronic digital computer, an early electronic digital computing device that has remained somewhat obscure.

New!!: Relay and Atanasoff–Berry computer · See more »

Athletics at the 1960 Summer Olympics – Men's 4 × 100 metres relay

The men's 4 x 100 metres relay event at the 1960 Olympic Games took place between September 7 and September 8.

New!!: Relay and Athletics at the 1960 Summer Olympics – Men's 4 × 100 metres relay · See more »

Athletics at the 1960 Summer Olympics – Men's 4 × 400 metres relay

The men's 4 x 400 metres relay event at the 1960 Olympic Games took place between September 7 and September 8.

New!!: Relay and Athletics at the 1960 Summer Olympics – Men's 4 × 400 metres relay · See more »

Athletics at the 1960 Summer Olympics – Women's 4 × 100 metres relay

The Women's 4 x 100 metres relay event at the 1960 Olympic Games took place between September 7 and September 8.

New!!: Relay and Athletics at the 1960 Summer Olympics – Women's 4 × 100 metres relay · See more »

Aurizon electric locomotives

Aurizon electric locomotives are used by Australian rail operator Aurizon in Queensland.

New!!: Relay and Aurizon electric locomotives · See more »

Australia at the World Championships in Athletics

Australia has participated in all the World Championships in Athletics since the beginning in 1983.

New!!: Relay and Australia at the World Championships in Athletics · See more »


Autogas is the common name for liquefied petroleum gas (LPG) when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators.

New!!: Relay and Autogas · See more »

Automatic block signaling

Automatic block signaling (ABS) is a railroad communications system that consists of a series of signals that divide a railway line into a series of sections, or "blocks".

New!!: Relay and Automatic block signaling · See more »

Automatic test equipment

Automatic test equipment or automated test equipment (ATE) is any apparatus that performs tests on a device, known as the device under test (DUT), equipment under test (EUT) or unit under test (UUT), using automation to quickly perform measurements and evaluate the test results.

New!!: Relay and Automatic test equipment · See more »

Automatic test switching

Automatic test system switching test equipment allows for high-speed testing of a device or devices in a test situation, where strict sequences and combinations of switching must be observed.

New!!: Relay and Automatic test switching · See more »


Automation is the technology by which a process or procedure is performed without human assistance.

New!!: Relay and Automation · See more »


Avnet, Inc. is one of the world's largest distributors of electronic components and embedded solutions and is headquartered in Phoenix, Arizona.

New!!: Relay and Avnet · See more »

BARK (computer)

BARK was an early electromechanical computer.

New!!: Relay and BARK (computer) · See more »

Basler Electric

Basler Electric is a manufacturer of power systems products based in Highland, Illinois.

New!!: Relay and Basler Electric · See more »

Battery isolator

A battery isolator is an electrical device that divides direct current (DC) into multiple branches and only allows current in one direction in each branch.

New!!: Relay and Battery isolator · See more »

Bert Bolle Barometer

The Bert Bolle Barometer is a large water barometer.

New!!: Relay and Bert Bolle Barometer · See more »


BESK (Binär Elektronisk SekvensKalkylator, Swedish for "Binary Electronic Sequence Calculator") was Sweden's first electronic computer, using vacuum tubes instead of relays.

New!!: Relay and BESK · See more »

Bhim Rao Ambedkar College

Bhim Rao Ambedkar College came into existence in 1991 during the birth centenary year of Bharat Ratna Baba Saheb Bhim Rao Ambedkar.

New!!: Relay and Bhim Rao Ambedkar College · See more »

Bhimsen Thapa

Bhimsen Thapa (भीमसेन थापा; August 1775 – 5 August 1839) was the Mukhtiyar (equivalent to prime minister) and de facto ruler of Nepal from 1806 to 1837.

New!!: Relay and Bhimsen Thapa · See more »

Bifilar coil

A bifilar coil is an electromagnetic coil that contains two closely spaced, parallel windings.

New!!: Relay and Bifilar coil · See more »

Bimetallic strip

A bimetallic strip is used to convert a temperature change into mechanical displacement.

New!!: Relay and Bimetallic strip · See more »


The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

New!!: Relay and Bit · See more »


A bobbin is a spindle or cylinder, with or without flanges, on which wire, yarn, thread or film is wound.

New!!: Relay and Bobbin · See more »

Body control module

In automotive electronics, body control module or 'body computer' is a generic term for an electronic control unit responsible for monitoring and controlling various electronic accessories in a vehicle's body.

New!!: Relay and Body control module · See more »


A borescope (occasionally called a boroscope, though this spelling is nonstandard) is an optical device consisting of a rigid or flexible tube with an eyepiece on one end, an objective lens on the other linked together by a relay optical system in between.

New!!: Relay and Borescope · See more »

British Rail Class 74

British Rail Class 74 was an electro-diesel locomotive that operated on the Southern Region of British Railways, rebuilt from redundant Class 71 locomotives in the late 1960s.

New!!: Relay and British Rail Class 74 · See more »

Brushed DC electric motor

A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source.

New!!: Relay and Brushed DC electric motor · See more »

Buchholz relay

In the field of electric power distribution and transmission, a Buchholz relay is a safety device mounted on some oil-filled power transformers and reactors, equipped with an external overhead oil reservoir called a "conservator".

New!!: Relay and Buchholz relay · See more »

Building automation

Building automation is the automatic centralized control of a building's heating, ventilation and air conditioning, lighting and other systems through a building management system or building automation system (BAS).

New!!: Relay and Building automation · See more »

Burmester Audiosysteme

No description.

New!!: Relay and Burmester Audiosysteme · See more »

Business telephone system

A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.

New!!: Relay and Business telephone system · See more »


A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short).

New!!: Relay and Buzzer · See more »


An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.

New!!: Relay and Calculator · See more »


CALDIC (the California Digital Computer) was an electronic digital computer built with the assistance of the Office of Naval Research at the University of California, Berkeley between 1951 and 1955 to assist and enhance research being conducted at the university with a platform for high-speed computing.

New!!: Relay and CALDIC · See more »

Catherine Hardy Lavender

Catherine Hardy Lavender (née Catherine Hardy) (February 8, 1930 – September 8, 2017) was an American athlete who competed mainly in the 100-meter dash.

New!!: Relay and Catherine Hardy Lavender · See more »

Cathode ray tube

The cathode ray tube (CRT) is a vacuum tube that contains one or more electron guns and a phosphorescent screen, and is used to display images.

New!!: Relay and Cathode ray tube · See more »

Central Power Research Institute

Central Power Research Institute (CPRI) was established by the Government of India in 1960 with headquarters in Bangalore.

New!!: Relay and Central Power Research Institute · See more »

Central processing unit

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

New!!: Relay and Central processing unit · See more »

CER Computer

CER (– Digital Electronic Computer) was a series of early computers (based on vacuum tubes and transistors) developed by Mihajlo Pupin Institute in Yugoslavia in the 1960s and 1970s.

New!!: Relay and CER Computer · See more »

Charles Adler Jr.

Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer.

New!!: Relay and Charles Adler Jr. · See more »

Cherry Valley O-scale

Cherry Valley O Scale is a not-for-profit club dedicated to the promotion of 2-rail O-scale (1:48) model railroading,"Choo Choo", All Around Pennsauken, December 2012 located in Merchantville, New Jersey, United States, in the basement/undercroft of the Grace Episcopal Church.

New!!: Relay and Cherry Valley O-scale · See more »

Circuit breaker

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

New!!: Relay and Circuit breaker · See more »


CircuitLogix is a software electronic circuit simulator which uses PSpice to simulate thousands of electronic devices, models, and circuits.

New!!: Relay and CircuitLogix · See more »

Clapham Junction rail crash

On the morning of 12 December 1988, a crowded passenger train crashed into the rear of another train that had stopped at a signal, just south of Clapham Junction railway station in London, and subsequently sideswiped an empty train travelling in the opposite direction.

New!!: Relay and Clapham Junction rail crash · See more »

Claude Shannon

Claude Elwood Shannon (April 30, 1916 – February 24, 2001) was an American mathematician, electrical engineer, and cryptographer known as "the father of information theory".

New!!: Relay and Claude Shannon · See more »


Complementary metal–oxide–semiconductor, abbreviated as CMOS, is a technology for constructing integrated circuits.

New!!: Relay and CMOS · See more »

Coil winding technology

In electrical engineering, coil winding is the manufacture of electromagnetic coils.

New!!: Relay and Coil winding technology · See more »

Collective routing

Collective routing is routing in which a switching center automatically delivers messages to a specified list of destinations.

New!!: Relay and Collective routing · See more »

Colossus computer

Colossus was a set of computers developed by British codebreakers in the years 1943–1945 to help in the cryptanalysis of the Lorenz cipher.

New!!: Relay and Colossus computer · See more »

Communications system

In telecommunication, a communications system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE) usually capable of interconnection and interoperation to form an integrated whole.

New!!: Relay and Communications system · See more »

Compact controller

A compact controller is a generic name given to a small autonomous controller which can control one or several control loops.

New!!: Relay and Compact controller · See more »


A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.

New!!: Relay and Computer · See more »

Computer-based interlocking

Computer Based Interlocking is the generic term for railway signal interlocking implemented with computers rather than older technologies such as relays or mechanics.

New!!: Relay and Computer-based interlocking · See more »

Connectivity exchange

Connectivity exchange (CONEX): In an adaptive or manually operated high-frequency (HF) radio network, the automatic or manual exchange of information concerning routes to stations that are not directly reachable by the exchange originator.

New!!: Relay and Connectivity exchange · See more »

Contact protection

Contact protection methods are designed to limit the wear and degradation that occur during the normal use of contacts within an electromechanical switch, relay or contactor.

New!!: Relay and Contact protection · See more »


A contactor is an electrically-controlled switch (relay) used for switching an electrical power circuit.

New!!: Relay and Contactor · See more »

Contesting technology

The sport of amateur radio contesting has been responsible for the development of contesting technology specific to the sport.

New!!: Relay and Contesting technology · See more »

Control system

A control system manages, commands, directs, or regulates the behavior of other devices or systems using control loops.

New!!: Relay and Control system · See more »

Cross-country skiing (sport)

The sport of cross-country skiing encompasses a variety of formats for cross-country skiing races over courses of varying lengths according to rules sanctioned by the International Ski Federation and by various national organizations, such as the U.S. Ski and Snowboard Association (USSA) and Cross Country Ski Canada.

New!!: Relay and Cross-country skiing (sport) · See more »

Cryptanalysis of the Lorenz cipher

Cryptanalysis of the Lorenz cipher was the process that enabled the British to read high-level German army messages during World War II.

New!!: Relay and Cryptanalysis of the Lorenz cipher · See more »

Damper (flow)

A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment.

New!!: Relay and Damper (flow) · See more »


A dashpot is a mechanical device, a damper which resists motion via viscous friction.

New!!: Relay and Dashpot · See more »

Data I/O

Data I/O Corporation is a manufacturer of programming and automated device handling systems for programmable integrated circuits.

New!!: Relay and Data I/O · See more »

DC connector

A DC connector (or DC plug, for one common type of connector) is an electrical connector for supplying direct current (DC) power.

New!!: Relay and DC connector · See more »

Dean Corll

Dean Arnold Corll (December 24, 1939 – August 8, 1973) was an American serial killer who, along with two teenaged accomplices named David Owen Brooks and Elmer Wayne Henley, Jr., abducted, raped, tortured, and murdered at least 28 teenage boys and young men in a series of killings spanning from 1970 to 1973 in Houston, Texas.

New!!: Relay and Dean Corll · See more »

Delay line memory

Delay line memory is a form of computer memory, now obsolete, that was used on some of the earliest digital computers.

New!!: Relay and Delay line memory · See more »

Digifant engine management system

The Digifant engine management system is an electronic engine control unit (ECU), which monitors and controls the fuel injection and ignition systems in petrol engines, designed by Volkswagen Group, in cooperation with Robert Bosch GmbH.

New!!: Relay and Digifant engine management system · See more »

Digital electronics

Digital electronics or digital (electronic) circuits are electronics that operate on digital signals.

New!!: Relay and Digital electronics · See more »

Digital protective relay

In utility and industrial electric power transmission and distribution systems, a digital protective relay is a computer-based system with software-based protection algorithms for the detection of electrical faults.

New!!: Relay and Digital protective relay · See more »

DIN 72552

DIN 72552 is a DIN standard for automobile electric terminal numbers, standardizing almost every contact in an automobile with a number code.

New!!: Relay and DIN 72552 · See more »

DIN rail

A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks.

New!!: Relay and DIN rail · See more »


A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.

New!!: Relay and Diode · See more »

Dispatcher training simulator

A dispatcher training simulator (DTS), also known as an operator training simulator (OTS), is a computer-based training system for operators (known as dispatchers) of electrical power grids.

New!!: Relay and Dispatcher training simulator · See more »

Distributed operating system

A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes.

New!!: Relay and Distributed operating system · See more »

Doncaster PSB

Doncaster PSB (Power Signal Box) is a signalling centre on the East Coast Main Line (ECML) railway in the United Kingdom, principally covering the line from London to Edinburgh but also encompassing other lines diverging and converging to the ECML.

New!!: Relay and Doncaster PSB · See more »

Double switching

A single-switched relay can close inadvertently in response to a single false feed current. A double-switched relay cannot close inadvertently with the application of the same current. At least two separate faults would be required to allow this relay to close inadvertently. Double switching, double cutting, or double breaking is the practice of using a multipole switch to close or open both the positive and negative sides of a DC electrical circuit, or both the hot and neutral sides of an AC circuit.

New!!: Relay and Double switching · See more »

Dry contact

Dry contact may mean any of the following in electronics.

New!!: Relay and Dry contact · See more »

Dual in-line package

In microelectronics, a dual in-line package (DIP or DIL), or dual in-line pin package (DIPP) is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins.

New!!: Relay and Dual in-line package · See more »

Earth leakage circuit breaker

An Earth-leakage circuit breaker (ELCB) is a safety device used in electrical installations with high Earth impedance to prevent shock.

New!!: Relay and Earth leakage circuit breaker · See more »

Edward Davy

Edward Davy (16 June 1806 – 26 January 1885) was an English physician, scientist, and inventor who played a prominent role in the development of telegraphy, and invented an electric relay.

New!!: Relay and Edward Davy · See more »

Electric bell

An electric bell is a mechanical bell that functions by means of an electromagnet.

New!!: Relay and Electric bell · See more »

Electrical contacts

An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers.

New!!: Relay and Electrical contacts · See more »

Electrical telegraph

An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via dedicated telecommunication circuit or radio.

New!!: Relay and Electrical telegraph · See more »

Electricity meter

analog electricity meter. Electricity meter with transparent plastic case (Israel) North American domestic electronic electricity meter An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device.

New!!: Relay and Electricity meter · See more »


An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

New!!: Relay and Electromagnet · See more »


In engineering, electromechanics combines processes and procedures drawn from electrical engineering and mechanical engineering.

New!!: Relay and Electromechanics · See more »

Electronic component

An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields.

New!!: Relay and Electronic component · See more »

Electronic gear-shifting system

An electronic gear-shifting system is a method of changing gears on a bicycle, which enables riders to shift with electronic switches instead of using conventional control levers and mechanical cables.

New!!: Relay and Electronic gear-shifting system · See more »

Electronic symbol

An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit.

New!!: Relay and Electronic symbol · See more »


Electronics is the discipline dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors.

New!!: Relay and Electronics · See more »

Electronics Technician distance education program

The Electronics Technician (ET) Distance Education program provides flexible, skills-based training in electronics.

New!!: Relay and Electronics Technician distance education program · See more »

Emergency light

An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage.

New!!: Relay and Emergency light · See more »


ENIAC (Electronic Numerical Integrator and Computer) was amongst the earliest electronic general-purpose computers made.

New!!: Relay and ENIAC · See more »

ER2 electric trainset

The ER2 electric trainset is a DC electric multiple unit which was in production by the Railroad Machinery Plants of Riga (in consortium with the Electrical Machinery Plants of Riga and the Railroad Machinery Plants of Kalinin) from June 1962 to mid-1984.

New!!: Relay and ER2 electric trainset · See more »

Ernst Reiter

Ernst Reiter (born 1962-10-31).

New!!: Relay and Ernst Reiter · See more »

Failure of electronic components

Electronic components have a wide range of failure modes.

New!!: Relay and Failure of electronic components · See more »

Fascination (game)

Fascination is a game commonly found in North American amusement parks, boardwalks and arcades.

New!!: Relay and Fascination (game) · See more »

Field magnet

Field magnet refers to a magnet used to produce a magnetic field in a device.

New!!: Relay and Field magnet · See more »

Field-effect transistor

The field-effect transistor (FET) is a transistor that uses an electric field to control the electrical behaviour of the device.

New!!: Relay and Field-effect transistor · See more »

Finite-state machine

A finite-state machine (FSM) or finite-state automaton (FSA, plural: automata), finite automaton, or simply a state machine, is a mathematical model of computation.

New!!: Relay and Finite-state machine · See more »

First Draft of a Report on the EDVAC

The First Draft of a Report on the EDVAC (commonly shortened to First Draft) is an incomplete 101-page document written by John von Neumann and distributed on June 30, 1945 by Herman Goldstine, security officer on the classified ENIAC project.

New!!: Relay and First Draft of a Report on the EDVAC · See more »

Fixed-point ocean observatory

A fixed-point ocean observatory is an autonomous system of automatic sensors and samplers that continuously gathers data from deep sea, water column and lower atmosphere, and transmits the data to shore in real or near real-time.

New!!: Relay and Fixed-point ocean observatory · See more »

Flip-flop (electronics)

In electronics, a flip-flop or latch is a circuit that has two stable states and can be used to store state information.

New!!: Relay and Flip-flop (electronics) · See more »

Floating-point arithmetic

In computing, floating-point arithmetic is arithmetic using formulaic representation of real numbers as an approximation so as to support a trade-off between range and precision.

New!!: Relay and Floating-point arithmetic · See more »

Flyback diode

A flyback diode is a diode connected across an inductor used to eliminate flyback, which is the sudden voltage spike seen across an inductive load when its supply current is suddenly reduced or interrupted.

New!!: Relay and Flyback diode · See more »


FR-4 (or FR4) is a NEMA grade designation for glass-reinforced epoxy laminate material.

New!!: Relay and FR-4 · See more »


FRABA is a worldwide company founded in Germany.

New!!: Relay and FRABA · See more »

Francisco Stromp

Francisco Stromp was a football player and coach, founding member and Club official of the Sporting Clube de Portugal.

New!!: Relay and Francisco Stromp · See more »

Friden Flexowriter

The Friden Flexowriter was a teleprinter, a heavy-duty electric typewriter capable of being driven not only by a human typing, but also automatically by several methods, including direct attachment to a computer and by use of paper tape.

New!!: Relay and Friden Flexowriter · See more »

FS Class E.636

The FS E.636 is a class of Italian articulated electric locomotives.

New!!: Relay and FS Class E.636 · See more »

FS Class E.656

The Class E.656 is an Italian articulated rheostatic-type electric locomotive built from 1975 to 1989.

New!!: Relay and FS Class E.656 · See more »

Gábor Kornél Tolnai

Gábor Kornél Tolnai, born November 22, 1902 in Budapest, died on February 3, 1982 in Stockholm, was a Hungarian-Swedish Diploma engineer, inventor, constructor, mechanical engineer, precision engineer, electrical engineer and a self-employed person. He is best known for his inventions and patents for spinning machines, devices for the Swedish National Defense and several types of tape recorders.

New!!: Relay and Gábor Kornél Tolnai · See more »


Geniac was an educational toy billed as a "computer" designed and marketed by Edmund Berkeley, with Oliver Garfield from 1955 to 1958, but with Garfield continuing without Berkeley through the 1960s.

New!!: Relay and Geniac · See more »

George Boole

George Boole (2 November 1815 – 8 December 1864) was a largely self-taught English mathematician, philosopher and logician, most of whose short career was spent as the first professor of mathematics at Queen's College, Cork in Ireland.

New!!: Relay and George Boole · See more »

George Stibitz

George Robert Stibitz (April 30, 1904 – January 31, 1995) was a Bell Labs researcher internationally recognized as one of the fathers of the modern first digital computer.

New!!: Relay and George Stibitz · See more »

Gilbert Vernam

Gilbert Sandford Vernam (3 April 1890 – 7 February 1960) was a Worcester Polytechnic Institute 1914 graduate and AT&T Bell Labs engineer who, in 1917, invented an additive polyalphabetic stream cipher and later co-invented an automated one-time pad cipher.

New!!: Relay and Gilbert Vernam · See more »


Glidcop is the registered trademark name of North American Höganäs, that refers to a family of copper-based metal matrix composite (MMC) alloys mixed primarily with aluminum oxide ceramic particles.

New!!: Relay and Glidcop · See more »

Glossary of electrical and electronics engineering

Most of the terms listed in Wikipedia glossaries are already defined and explained within Wikipedia itself.

New!!: Relay and Glossary of electrical and electronics engineering · See more »

Grace Hopper

Grace Brewster Murray Hopper (December 9, 1906 – January 1, 1992) was an American computer scientist and United States Navy rear admiral.

New!!: Relay and Grace Hopper · See more »

Grant Building

The Grant Building is 40-story, skyscraper at 310 Grant Street in downtown Pittsburgh, Pennsylvania.

New!!: Relay and Grant Building · See more »

H bridge

An H bridge is an electronic circuit that enables a voltage to be applied across a load in opposite direction.

New!!: Relay and H bridge · See more »

Harvard Mark I

The IBM Automatic Sequence Controlled Calculator (ASCC), called Mark I by Harvard University’s staff, was a general purpose electromechanical computer that was used in the war effort during the last part of World War II.

New!!: Relay and Harvard Mark I · See more »

Harvey mannequin

Harvey was one of the earliest medical simulators available for training of health care professionals.

New!!: Relay and Harvey mannequin · See more »

Harwell CADET

The Harwell CADET was the first fully transistorized computer in Europe, and may have been the first fully transistorized computer in the world.

New!!: Relay and Harwell CADET · See more »

Harwell computer

The Harwell computer, later known as the Wolverhampton Instrument for Teaching Computing from Harwell (WITCH), or the Harwell Dekatron Computer, is an early British relay-based computer of the 1950s.

New!!: Relay and Harwell computer · See more »

Hawthorne effect

The Hawthorne effect (also referred to as the observer effect) is a type of reactivity in which individuals modify an aspect of their behavior in response to their awareness of being observed.

New!!: Relay and Hawthorne effect · See more »

Health and Sports Day

, also known as Health-Sports Day or Sports Day, is a national holiday in Japan held annually on the second Monday in October.

New!!: Relay and Health and Sports Day · See more »

Heath Robinson (codebreaking machine)

Heath Robinson was a machine used by British codebreakers at the Government Code and Cypher School (GC&CS) at Bletchley Park during World War II in Cryptanalysis of the Lorenz cipher.

New!!: Relay and Heath Robinson (codebreaking machine) · See more »

Hengstler GmbH

Hengstler is a medium-sized company, which is specialized in the production of industrial counting and control components.

New!!: Relay and Hengstler GmbH · See more »


Hesselberg (689 m above sea level) is the highest point in Middle Franconia and the Franconian Jura and is situated 60 km south west of Nuremberg, Germany.

New!!: Relay and Hesselberg · See more »

High voltage interface relays

High voltage interface relays, a.k.a., interface relays: or coupling relays or insulating interfaces is a special class of electrical relays designed to provide informational and electrical compatibility between functional components isolated from each other and not allowing for a direct connection due to a high difference of potentials.

New!!: Relay and High voltage interface relays · See more »

History of computing hardware

The history of computing hardware covers the developments from early simple devices to aid calculation to modern day computers.

New!!: Relay and History of computing hardware · See more »

History of mobile phones

The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network.

New!!: Relay and History of mobile phones · See more »

History of numerical control

The history of numerical control (NC) began when the automation of machine tools first incorporated concepts of abstractly programmable logic, and it continues today with the ongoing evolution of computer numerical control (CNC) technology.

New!!: Relay and History of numerical control · See more »


Holography is the science and practice of making holograms.

New!!: Relay and Holography · See more »

Homebuilt computer

A custom-built or homebuilt computer is a computer assembled from available components, usually commercial off-the-shelf (COTS) components, rather than purchased as a complete system from a computer system supplier, also known as pre-built systems.

New!!: Relay and Homebuilt computer · See more »

Homebuilt machines

Homebuilt machines are machines built outside of specialised workshops or factories.

New!!: Relay and Homebuilt machines · See more »

IBM 1620

The IBM 1620 was announced by IBM on October 21, 1959, and marketed as an inexpensive "scientific computer".

New!!: Relay and IBM 1620 · See more »


The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage.

New!!: Relay and IBM 305 RAMAC · See more »

IBM 407

The IBM 407 Accounting Machine, introduced in 1949, was one of a long line of IBM tabulating machines dating back to the days of Herman Hollerith.

New!!: Relay and IBM 407 · See more »

IBM 557

The IBM 557 Alphabetic Interpreter allowed holes in punched cards to be interpreted and the punched card characters printed on any row or column, selected by a control panel.

New!!: Relay and IBM 557 · See more »

IBM 6400 Series

The IBM 6400 series is a series of four calculating and accounting machines produced by IBM starting in 1962.

New!!: Relay and IBM 6400 Series · See more »


The IBM Selective Sequence Electronic Calculator (SSEC) was an electromechanical computer built by IBM.

New!!: Relay and IBM SSEC · See more »

ICT 1301

The ICT 1301 and its smaller derivative ICT 1300 were early business computers from International Computers and Tabulators.

New!!: Relay and ICT 1301 · See more »


IMDT may refer to.

New!!: Relay and IMDT · See more »


An immobiliser or immobilizer is an electronic security device fitted to an automobile that prevents the engine from running unless the correct transponder car key (or other token) is present.

New!!: Relay and Immobiliser · See more »

Index of electrical engineering articles

This is an alphabetical list of articles pertaining specifically to electrical and electronics engineering.

New!!: Relay and Index of electrical engineering articles · See more »

Index of electronics articles

This is an index of articles relating to electronics and electricity or natural electricity and things that run on electricity and things that use or conduct electricity.

New!!: Relay and Index of electronics articles · See more »

Industrial control system

Industrial control system (ICS) is a general term that encompasses several types of control systems and associated instrumentation used for industrial process control.

New!!: Relay and Industrial control system · See more »

Inertial switch

An inertial switch is a switch, firmly mounted upon a vehicle or other mobile device, that triggers in the event of shock or vibration.

New!!: Relay and Inertial switch · See more »

Information technology

Information technology (IT) is the use of computers to store, retrieve, transmit, and manipulate data, or information, often in the context of a business or other enterprise.

New!!: Relay and Information technology · See more »


Instrumentation is a collective term for measuring instruments used for indicating, measuring and recording physical quantities, and has its origins in the art and science of scientific instrument-making.

New!!: Relay and Instrumentation · See more »

Intelsat IV F-1

Intelsat IV F-1 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-1 · See more »

Intelsat IV F-2

Intelsat IV F-2 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-2 · See more »

Intelsat IV F-4

Intelsat IV F-4 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-4 · See more »

Intelsat IV F-5

Intelsat IV F-5 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-5 · See more »

Intelsat IV F-6

Intelsat IV F-6 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-6 · See more »

Intelsat IV F-7

Intelsat IV F-7 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-7 · See more »

Intelsat IV F-8

Intelsat IV F-8 was a geostationary communication satellite built by Hughes, it was owned by Intelsat.

New!!: Relay and Intelsat IV F-8 · See more »


In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings.

New!!: Relay and Interlocking · See more »

Invention of the integrated circuit

The idea of integrating electronic circuits into a single device was born when the German physicist and engineer developed and patented the first known integrated transistor amplifier in 1949 and the British radio engineer Geoffrey Dummer proposed to integrate a variety of standard electronic components in a monolithic semiconductor crystal in 1952.

New!!: Relay and Invention of the integrated circuit · See more »

James W. Bryce

James Wares Bryce (1880 – 1949) was an American engineer and inventor.

New!!: Relay and James W. Bryce · See more »

Jarlsberg Tunnel

The Jarlsberg Tunnel (Jarlsbergtunnelen) is a long double track railway tunnel which runs through Frodeåsen in Tønsberg, Norway.

New!!: Relay and Jarlsberg Tunnel · See more »

Jim Kelley Amplifiers

Jim Kelley Amplifiers is the trademark for the vacuum tube guitar amplifiers designed by Jim Kelley and manufactured by his company Active Guitar Electronics of Tustin, California between the years of 1978 and 1985.

New!!: Relay and Jim Kelley Amplifiers · See more »

John Kennedy College

John Kennedy College is a boys school in Beau-Bassin, Mauritius.

New!!: Relay and John Kennedy College · See more »

Joseph Henry

Joseph Henry (December 17, 1797 – May 13, 1878) was an American scientist who served as the first Secretary of the Smithsonian Institution.

New!!: Relay and Joseph Henry · See more »


A keypunch is a device for precisely punching holes into stiff paper cards at specific locations as determined by keys struck by a human operator.

New!!: Relay and Keypunch · See more »

Killer poke

In computer jargon, a killer poke is a method of inducing physical hardware damage on a machine or its peripherals by the insertion of invalid values, via, for example, BASIC's POKE command, into a memory-mapped control register.

New!!: Relay and Killer poke · See more »

Knife switch

A knife switch is a type of switch used to control the flow of electricity in a circuit.

New!!: Relay and Knife switch · See more »

Konrad Zuse

Konrad Zuse (22 June 1910 – 18 December 1995) was a German civil engineer, inventor and computer pioneer.

New!!: Relay and Konrad Zuse · See more »

Korndörfer autotransformer starter

In electrical engineering, the Korndorfer starter is a technique used for reduced voltage soft starting of induction motors.

New!!: Relay and Korndörfer autotransformer starter · See more »

Kristen Heiss

Kristen Pritchett formerly Kristen Elizabeth Heiss (born May 12, 1987) is an American backstroke and freestyle swimmer.

New!!: Relay and Kristen Heiss · See more »


The TSEC/KW-26, code named ROMULUS, (in 1966 the machine based encryption system was not code-named "Romulus," rather the code-name was "Orion," at least in the US Army's variant) was an encryption system used by the U.S. Government and, later, by NATO countries.

New!!: Relay and KW-26 · See more »

Ladder logic

Ladder logic was originally a written method to document the design and construction of relay racks as used in manufacturing and process control.

New!!: Relay and Ladder logic · See more »

Lagardère Group

Lagardère is a multinational media conglomerate headquartered in the 16th arrondissement of Paris.

New!!: Relay and Lagardère Group · See more »

Language lab

The language laboratory is an audio or audio-visual installation used as an aid in modern language teaching.

New!!: Relay and Language lab · See more »

Latch (disambiguation)

A latch is a type of door or window fastener.

New!!: Relay and Latch (disambiguation) · See more »

Latching switch

A latching switch is a switch that maintains its state after being activated.

New!!: Relay and Latching switch · See more »

Lens Controller

A Lens Controller is device that controls motorized photographic lens functions such as zoom, focus, and iris or aperture.

New!!: Relay and Lens Controller · See more »

Leslie speaker

The Leslie speaker is a combined amplifier and loudspeaker that projects the signal from an electric or electronic instrument and modifies the sound by rotating the loudspeakers.

New!!: Relay and Leslie speaker · See more »

Light switch

In electrical wiring, a light switch is a switch, most commonly used to operate electric lights, permanently connected equipment, or electrical outlets.

New!!: Relay and Light switch · See more »

Lighting control system

A lighting control system is an intelligent network based lighting control solution that incorporates communication between various system inputs and outputs related to lighting control with the use of one or more central computing devices.

New!!: Relay and Lighting control system · See more »

Limit switch

In electrical engineering a limit switch is a switch operated by the motion of a machine part or presence of an object.

New!!: Relay and Limit switch · See more »


LINC-8 was the name of a minicomputer manufactured by Digital Equipment Corporation between 1966 and 1969.

New!!: Relay and LINC-8 · See more »

Link 22

Link 22 is a secure digital radio link in the HF and UHF bands, primarily used by military forces as a tactical data link.

New!!: Relay and Link 22 · See more »

List of acronyms: N

(Main list of acronyms).

New!!: Relay and List of acronyms: N · See more »

List of computer term etymologies

This is a list of the origins of computer-related terms or terms used in the computing world (i.e., a list of computer term etymologies).

New!!: Relay and List of computer term etymologies · See more »

List of European Aquatics Championships medalists in swimming (men)

This is the complete list of men's LEN European Aquatics Championships medalists in swimming from 1926 to 2016.

New!!: Relay and List of European Aquatics Championships medalists in swimming (men) · See more »

List of European Aquatics Championships medalists in swimming (women)

This is the complete list of women's LEN European Aquatics Championships medalists in swimming from 1927 to 2016.

New!!: Relay and List of European Aquatics Championships medalists in swimming (women) · See more »

List of International Electrotechnical Commission standards

This is an incomplete list of standards published by the International Electrotechnical Commission (IEC).

New!!: Relay and List of International Electrotechnical Commission standards · See more »

List of inventors

This is a list of notable inventors.

New!!: Relay and List of inventors · See more »

List of vacuum tube computers

Vacuum tube computers, now termed first generation computers, are programmable digital computers using vacuum tube logic circuitry.

New!!: Relay and List of vacuum tube computers · See more »

List of vacuum tubes

This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes.

New!!: Relay and List of vacuum tubes · See more »

Live: Sadler's Wells

Pete Townshend Live: Sadler's Wells 2000 is a live album released by Pete Townshend in 2000.

New!!: Relay and Live: Sadler's Wells · See more »

Logic gate

In electronics, a logic gate is an idealized or physical device implementing a Boolean function; that is, it performs a logical operation on one or more binary inputs and produces a single binary output.

New!!: Relay and Logic gate · See more »

Magnetic circuit

A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux.

New!!: Relay and Magnetic circuit · See more »

Magnetic starter

A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load.

New!!: Relay and Magnetic starter · See more »


Magnetism is a class of physical phenomena that are mediated by magnetic fields.

New!!: Relay and Magnetism · See more »

Märklin Digital

Märklin Digital was among the earlier digital model railway control systems.

New!!: Relay and Märklin Digital · See more »

Mechanical Engineering Heritage (Japan)

The is a list of sites, landmarks, machines, and documents that made significant contributions to the development of mechanical engineering in Japan.

New!!: Relay and Mechanical Engineering Heritage (Japan) · See more »

Media in Atlanta

As of 2011, metro Atlanta was the ninth-largest media market in the United States.

New!!: Relay and Media in Atlanta · See more »

Megger Group Limited

Megger Group Limited is a company that manufactures electronic test equipment and measuring instruments for electrical power applications.

New!!: Relay and Megger Group Limited · See more »

Mercury relay

A mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercury as the switching element.

New!!: Relay and Mercury relay · See more »

Mercury switch

A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit.

New!!: Relay and Mercury switch · See more »

Mercury-Redstone 1

Mercury-Redstone 1 (MR-1) was the first Mercury-Redstone unmanned flight test in Project Mercury and the first attempt to launch a Mercury spacecraft with the Mercury-Redstone Launch Vehicle.

New!!: Relay and Mercury-Redstone 1 · See more »

Metaphorical extension

A metaphorical extension is the "extension of meaning in a new direction" through popular adoption of an original metaphorical comparison.

New!!: Relay and Metaphorical extension · See more »


A microcontroller (MCU for microcontroller unit, or UC for μ-controller) is a small computer on a single integrated circuit.

New!!: Relay and Microcontroller · See more »

Minivac 601

Minivac 601 Digital Computer Kit was an electromechanical digital computer system created by information theory pioneer Claude Shannon as an educational kit using digital circuits.

New!!: Relay and Minivac 601 · See more »

Mobile incinerator

The role of incineration of waste and equipment used for it has changed radically in the recent years.

New!!: Relay and Mobile incinerator · See more »

Motor controller

A motor controller is a device or group of devices that serves to govern in some predetermined manner the performance of an electric motor.

New!!: Relay and Motor controller · See more »

Motorola MC14500B

The MC14500B Industrial Control Unit (ICU) is a CMOS one-bit microprocessor designed by Motorola for simple control applications in 1977.

New!!: Relay and Motorola MC14500B · See more »

Motorola Minitor

The Motorola Minitor is a portable, analog, receive only, voice pager typically carried by fire, rescue, and EMS personnel (both volunteer and career) to alert of emergencies.

New!!: Relay and Motorola Minitor · See more »

Multi Rolle Radio

Multi Rolle Radio (English: Multi Role Radio) is a modular radio set which supports high speed frequency hopping and strong encryption.

New!!: Relay and Multi Rolle Radio · See more »

Multiway switching

In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load (often, but not always, lighting) from more than one location.

New!!: Relay and Multiway switching · See more »

Muni Metro

The Muni Metro is a light rail system serving San Francisco, California, operated by the San Francisco Municipal Railway (Muni), a division of the San Francisco Municipal Transportation Agency (SFMTA).

New!!: Relay and Muni Metro · See more »

Music sequencer

A music sequencer (or simply sequencer) is a device or application software that can record, edit, or play back music, by handling note and performance information in several forms, typically CV/Gate, MIDI, or Open Sound Control (OSC), and possibly audio and automation data for DAWs and plug-ins.

New!!: Relay and Music sequencer · See more »

NEMA contact ratings

NEMA contact ratings are how much current at a rated voltage a relay or other pilot device can switch.

New!!: Relay and NEMA contact ratings · See more »

New York Transit Museum

The New York Transit Museum (also called the NYC Transit Museum) is a museum that displays historical artifacts of the New York City Subway, bus, and commuter rail systems in the greater New York City metropolitan region.

New!!: Relay and New York Transit Museum · See more »

Nominal impedance

Nominal impedance in electrical engineering and audio engineering refers to the approximate designed impedance of an electrical circuit or device.

New!!: Relay and Nominal impedance · See more »

Non-dim circuit

A non-dim circuit is a special electrical network.

New!!: Relay and Non-dim circuit · See more »

Nonblocking minimal spanning switch

A nonblocking minimal spanning switch is a device that can connect N inputs to N outputs in any combination.

New!!: Relay and Nonblocking minimal spanning switch · See more »

North American railroad signals

North American railroad signals generally fall into the category of multi-headed electrically lit units displaying speed-based or weak route signaling. Signals may be of the searchlight, color light, position light, or color position light types, each displaying a variety of aspects which inform the locomotive engineer of track conditions so that he or she may keep their train under control and able to stop short of any obstruction or dangerous condition.

New!!: Relay and North American railroad signals · See more »

North Sea Mine Barrage

The North Sea Mine Barrage, also known as the Northern Barrage, was a large minefield laid easterly from the Orkney Islands to Norway by the United States Navy (assisted by the Royal Navy) during World War I. The objective was to inhibit the movement of U-boats from bases in Germany to the Atlantic shipping lanes bringing supplies to the British Isles.

New!!: Relay and North Sea Mine Barrage · See more »

Northern Barrage

The Northern Barrage was the name given to an extensive series of defensive minefields laid by the British during World War II in order to restrict German access to the Atlantic Ocean.

New!!: Relay and Northern Barrage · See more »


NSI-63 is a railway signaling system used for interlocking on the Norwegian railway network.

New!!: Relay and NSI-63 · See more »

Number One Electronic Switching System

The Number One Electronic Switching System (1ESS) was the first large-scale stored program control (SPC) telephone exchange or electronic switching system in the Bell System.

New!!: Relay and Number One Electronic Switching System · See more »


is an electronics company based in Kyoto, Japan.

New!!: Relay and Omron · See more »

On-board data handling

The on-board data handling (OBDH) subsystem of a spacecraft is the subsystem which carries and stores data between the various electronics units and the ground segment, via the telemetry, tracking and command (TT&C) subsystem.

New!!: Relay and On-board data handling · See more »

Open collector

An open collector is a common type of output found on many integrated circuits (IC), which behaves like a switch that is either connected to ground or disconnected.

New!!: Relay and Open collector · See more »


openSAFETY is a communications protocol used to transmit information that is crucial for the safe operation of machinery in manufacturing lines, process plants, or similar industrial environments.

New!!: Relay and OpenSafety · See more »

Opto 22

Opto 22 is a manufacturing company specializing in hardware and software products for industrial automation, remote monitoring, and data acquisition.

New!!: Relay and Opto 22 · See more »

Otylia Jędrzejczak

Otylia Jędrzejczak (born 13 December 1983) is a Polish swimmer.

New!!: Relay and Otylia Jędrzejczak · See more »

Passive infrared sensor

A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view.

New!!: Relay and Passive infrared sensor · See more »

Passivity (engineering)

Passivity is a property of engineering systems, used in a variety of engineering disciplines, but most commonly found in analog electronics and control systems.

New!!: Relay and Passivity (engineering) · See more »

Phoenix Contact

Phoenix Contact manufactures industrial automation, interconnection, and interface solutions.

New!!: Relay and Phoenix Contact · See more »

PID controller

A proportional–integral–derivative controller (PID controller or three term controller) is a control loop feedback mechanism widely used in industrial control systems and a variety of other applications requiring continuously modulated control.

New!!: Relay and PID controller · See more »


Pinball is a type of arcade game, in which points are scored by a player manipulating one or more steel balls on a play field inside a glass-covered cabinet called a pinball table (or "pinball machine").

New!!: Relay and Pinball · See more »


A plugboard, or control panel (the term used depended on the application area), is an array of jacks, or sockets (often called hubs), into which patch cords can be inserted to complete an electrical circuit.

New!!: Relay and Plugboard · See more »

Power-system protection

Power-system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults through the isolation of faulted parts from the rest of the electrical network.

New!!: Relay and Power-system protection · See more »


Pre-charge of the powerline voltages in a high voltage DC application is a preliminary mode which limits the inrush current during the power up procedure.

New!!: Relay and Pre-charge · See more »

Principles of Electronics

Principles of Electronics is a 2002 book by Colin Simpson designed to accompany the Electronics Technician distance education program and contains a concise and practical overview of the basic principles, including theorems, circuit behavior and problem-solving procedures of Electronic circuits and devices.

New!!: Relay and Principles of Electronics · See more »

Productivity improving technologies

This article is about the important technologies that have historically increased productivity and is intended to serve as the History section of Productivity from which it was moved.

New!!: Relay and Productivity improving technologies · See more »

Programmable logic controller

A programmable logic controller (PLC), or programmable controller is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.

New!!: Relay and Programmable logic controller · See more »

Programmable thermostat

A programmable thermostat is a thermostat which is designed to adjust the temperature according to a series of programmed settings that take effect at different times of the day.

New!!: Relay and Programmable thermostat · See more »

Protective relay

In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected.

New!!: Relay and Protective relay · See more »

Public safety answering point

A public-safety answering point (PSAP), sometimes called "public-safety access point", is a call center in Canada and the United States responsible for answering calls to an emergency telephone number for police, firefighting, and ambulance services.

New!!: Relay and Public safety answering point · See more »

Pull-up resistor

In electronic logic circuits, a pull-up resistor is a resistor used to ensure a known state for a signal.

New!!: Relay and Pull-up resistor · See more »

Pulse-address multiple access

In telecommunications, pulse-address multiple access (PAMA) is a channel access method that enables the ability of a communication satellite to receive signals from several Earth terminals simultaneously and to amplify, translate, and relay the signals back to Earth, based on the addressing of each station by an assignment of a unique combination of time and frequency slots.

New!!: Relay and Pulse-address multiple access · See more »

QSK operation (full break-in)

Turning over a communications channel is the change in communications protocol transmission status that occurs when a transmitting station releases transmitting control of a communications channel thus turning it over to allow another station to transmit.

New!!: Relay and QSK operation (full break-in) · See more »


Qualitrol is a condition monitoring technology company headquartered in Fairport, New York.

New!!: Relay and Qualitrol · See more »

R. E. B. Crompton

Rookes Evelyn Bell Crompton, CB, FRS (31 May 1845 – 15 February 1940) was a British electrical engineer, industrialist and inventor.

New!!: Relay and R. E. B. Crompton · See more »


RaceCam is a video camera system used primarily in motor racing, which uses a network of car-mounted cameras, microwave radio transmitters, and relays from helicopters to send live images from inside a race car to both pit crews and television audiences.

New!!: Relay and RaceCam · See more »

Radio control

Radio control (often abbreviated to R/C or simply RC) is the use of radio signals to remotely control a device.

New!!: Relay and Radio control · See more »

Radio receiver

In radio communications, a radio receiver (receiver or simply radio) is an electronic device that receives radio waves and converts the information carried by them to a usable form.

New!!: Relay and Radio receiver · See more »

Radio-controlled model

A radio-controlled model (or RC model) is a model that is steerable with the use of radio control.

New!!: Relay and Radio-controlled model · See more »

Raelene Boyle

Raelene Ann Boyle (born 24 June 1951) is an Australian retired athlete, who represented Australia at three Olympic Games as a sprinter, winning three silver medals.

New!!: Relay and Raelene Boyle · See more »

Railway signal

A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to engine drivers (engineers in North America).

New!!: Relay and Railway signal · See more »

Railway signalling

Railway signalling is a system used to direct railway traffic and keep trains clear of each other at all times.

New!!: Relay and Railway signalling · See more »

Railway slide fence

Part of a railway signaling system, a slide fence is a fence whose purpose is to prevent trains from being derailed by rock slides in mountainous areas where rock slides may occur without warning.

New!!: Relay and Railway slide fence · See more »

Random-access memory

Random-access memory (RAM) is a form of computer data storage that stores data and machine code currently being used.

New!!: Relay and Random-access memory · See more »

Real Time Digital Simulator

Real Time Digital Simulator or RTS as the abbreviation recommended by IEEE committee on real-time simulator applied for power systems provides power systems simulation technology for fast, reliable, accurate and cost-effective study of power systems with complex High Voltage Alternating Current (HVAC) and High Voltage Direct Current (HVDC) networks.

New!!: Relay and Real Time Digital Simulator · See more »

Reed receiver

A reed receiver or tuned reed receiver (US) was a form of multi-channel signal decoder used for early radio control systems.

New!!: Relay and Reed receiver · See more »

Reed relay

A reed relay is a type of relay that uses an electromagnet to control one or more reed switches.

New!!: Relay and Reed relay · See more »

Reference designator

A reference designator unambiguously identifies a component in an electrical schematic or on a printed circuit board.

New!!: Relay and Reference designator · See more »

Relaxation oscillator

In electronics a relaxation oscillator is a nonlinear electronic oscillator circuit that produces a nonsinusoidal repetitive output signal, such as a triangle wave or square wave.

New!!: Relay and Relaxation oscillator · See more »


A relay is an electrically operated switch.

New!!: Relay and Relay · See more »

Relay (disambiguation)

A relay is an electronic component; a form of switch.

New!!: Relay and Relay (disambiguation) · See more »

Relay logic

Relay logic is a method of implementing combinational logic in electrical control circuits by using several electrical relays wired in a particular configuration.

New!!: Relay and Relay logic · See more »

Release time (telecommunication)

In telecommunication, release time is the time interval for a circuit to respond when an enabling signal is discontinued, for example.

New!!: Relay and Release time (telecommunication) · See more »


In telecommunications, a repeater is an electronic device that receives a signal and retransmits it.

New!!: Relay and Repeater · See more »


Retrotronics (a portmanteau of "retro" and "electronics", also retro-tronics) is the making of electric circuits or appliances using older electric components, such as vacuum tubes, Nixie displays, relays, uniselectors, analogue meters, etc.

New!!: Relay and Retrotronics · See more »


ReVox is a brand name, registered by Studer on March 27, 1951, for Swiss audio equipment.

New!!: Relay and Revox · See more »

Rhine–Main–Danube Canal

The Rhine–Main–Danube Canal (German: Rhein-Main-Donau-Kanal; also called Main-Danube Canal, RMD Canal or Europa Canal), in Bavaria, Germany, connects the Main and the Danube rivers across the European Watershed, running from Bamberg via Nuremberg to Kelheim.

New!!: Relay and Rhine–Main–Danube Canal · See more »


In telephony, ringdown is a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp or cause the operation of a self-locking relay known as a drop.

New!!: Relay and Ringdown · See more »

Robert Hope-Jones

Robert Hope-Jones (9 February 1859 – 13 September 1914) was an English musician, who is considered to be the inventor of the theatre organ in the early 20th century.

New!!: Relay and Robert Hope-Jones · See more »

Robert W. Lucky

Robert Wendell Lucky (born January 9, 1936) is an electrical engineer, inventor, and research manager who worked at Bell Labs and Telcordia Technologies.

New!!: Relay and Robert W. Lucky · See more »

Robin Armstrong

Robin Armstrong (born April 22, 1969) is an African-American politician and physician who served as vice chairman of the Republican Party of Texas from 2006 to 2010.

New!!: Relay and Robin Armstrong · See more »


Robosquirrel refers to several versions of robotic squirrels developed by researchers at the University of California, Davis and San Diego State University.

New!!: Relay and Robosquirrel · See more »

Royal Radar Establishment Automatic Computer

The Royal Radar Establishment Automatic Computer, or the RREAC, was an early solid-state computer in 1962.

New!!: Relay and Royal Radar Establishment Automatic Computer · See more »


Ry or RY may refer to: Arts and entertainment.

New!!: Relay and RY · See more »

Safety instrumented system

A safety instrumented system (SIS) consists of an engineered set of hardware and software controls which are especially used on critical process systems.

New!!: Relay and Safety instrumented system · See more »

Safety relay

Safety relays are devices that generally implement safety functions.

New!!: Relay and Safety relay · See more »

Samuel Morse

Samuel Finley Breese Morse (April 27, 1791 – April 2, 1872) was an American painter and inventor. After having established his reputation as a portrait painter, in his middle age Morse contributed to the invention of a single-wire telegraph system based on European telegraphs. He was a co-developer of the Morse code and helped to develop the commercial use of telegraphy.

New!!: Relay and Samuel Morse · See more »

SAPO (computer)

The SAPO (short for Samočinný počítač, “automatic computer”) was the first Czechoslovak computer.

New!!: Relay and SAPO (computer) · See more »

Satellite modem

A satellite modem or satmodem is a modem used to establish data transfers using a communications satellite as a relay.

New!!: Relay and Satellite modem · See more »

SBB-CFF-FFS Be 4/6 12302

The Be 4/6 12302 was one of four test locomotives ordered by the Schweizerischen Bundesbahnen (Swiss Federal Railways) (SBB) in June 1917, along with the Be 3/5 12201, Be 4/6 12301 and Ce 6/8I14201.

New!!: Relay and SBB-CFF-FFS Be 4/6 12302 · See more »

Schafer automation system

The first Schafer Automation System, installed at KGEE(AM) in Bakersfield, California in 1956, was dubbed the "blue-wire job" because all of the wiring in it was blue, its inventor, Paul Schafer said.

New!!: Relay and Schafer automation system · See more »

Schleicher Electronic

Schleicher Electronic GmbH und Co.

New!!: Relay and Schleicher Electronic · See more »

Schweitzer Engineering Laboratories

Schweitzer Engineering Laboratories, Inc. (SEL) designs, manufactures, and supports products and services ranging from generator and transmission protection to distribution automation and control systems.

New!!: Relay and Schweitzer Engineering Laboratories · See more »


A scoreboard is a large board for publicly displaying the score in a game.

New!!: Relay and Scoreboard · See more »

September 9

No description.

New!!: Relay and September 9 · See more »

Sergey Ustiugov

Sergey Aleksandrovich Ustiugov (Сергей Александрович Устюгов; born 8 April 1992) is a Russian cross-country skier, world champion and Tour de Ski winner.

New!!: Relay and Sergey Ustiugov · See more »

Simon (computer)

Simon was a relay-based computer, described by Edmund Berkeley in a series of thirteen construction articles in Radio-Electronics magazine, from October 1950.

New!!: Relay and Simon (computer) · See more »


Ski orienteering (SkiO) is a cross-country skiing endurance winter racing sport and one of the four orienteering disciplines recognized by the IOF.

New!!: Relay and Ski-orienteering · See more »


Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism.

New!!: Relay and Slate · See more »


A snubber is a device used to suppress ("snub") a phenomenon such as voltage transients in electrical systems, pressure transients in fluid systems (caused by for example water hammer) or excess force or rapid movement in mechanical systems.

New!!: Relay and Snubber · See more »

Solar transit

In astronomy, a solar transit is a movement of any object passing between the Sun and the Earth.

New!!: Relay and Solar transit · See more »


A solenoid (/ˈsolə.nɔɪd/) (from the French solénoïde, derived in turn from the Greek solen ("pipe, channel") and eidos ("form, shape")) is a coil wound into a tightly packed helix.

New!!: Relay and Solenoid · See more »

Solid State Interlocking

Solid State Interlocking (SSI) is the brand name of the first generation processor-based interlocking developed in the 1980s by British Rail's Research Division, GEC-General Signal and Westinghouse Signals Ltd in the UK.

New!!: Relay and Solid State Interlocking · See more »

Solid-state electronics

Solid-state electronics means semiconductor electronics; electronic equipment using semiconductor devices such as semiconductor diodes, transistors, and integrated circuits (ICs).

New!!: Relay and Solid-state electronics · See more »

Solid-state relay

A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals.

New!!: Relay and Solid-state relay · See more »

Spark-gap transmitter

A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.

New!!: Relay and Spark-gap transmitter · See more »

Stack light

Stack lights (aka: signal tower lights, indicator lights, AndOn lights, warning lights, industrial signal lights, tower lights and light towers) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine state or process event to machine operators, technicians, production managers and factory personnel.

New!!: Relay and Stack light · See more »

Starter (engine)

A starter (also self-starter, self, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power.

New!!: Relay and Starter (engine) · See more »

Starter solenoid

A starter solenoid (or starter relay) is the part of an automobile which switches a large electric current to the starter motor, in response to a small control current, and which in turn sets the engine in motion.

New!!: Relay and Starter solenoid · See more »

Static relay

In electrical systems, a static relay is a type of relay, an electrically operated switch, that has no moving parts.

New!!: Relay and Static relay · See more »

Stepping switch

In electrical controls, a stepping switch or stepping relay, also known as a uniselector, is an electromechanical device that switches an input signal path to one of several possible output paths, directed by a train of electrical pulses.

New!!: Relay and Stepping switch · See more »

Stop action magnet

The stop action magnet, usually abbreviated to SAM, is an electromagnetic device used for the control of pipe organs and virtual pipe organs, and forms part of the organ's combination action.

New!!: Relay and Stop action magnet · See more »


Struthers-Dunn LLC, formally known as Struthers-Dunn or Dunco, is a manufacturer of industrial controls since 1923.

New!!: Relay and Struthers-Dunn · See more »

Subaudible tone

For the use of subaudible tones in Two-way radio see: CTCSS A subaudible tone is a tone that is used to trigger an automated event at a radio station.

New!!: Relay and Subaudible tone · See more »


A subcarrier is a sideband of a radio frequency carrier wave, which is modulated to send additional information.

New!!: Relay and Subcarrier · See more »

Super Bowl XLVII

Super Bowl XLVII was an American football game between the American Football Conference (AFC) champion Baltimore Ravens and the National Football Conference (NFC) champion San Francisco 49ers to decide the National Football League (NFL) champion for the 2012 season.

New!!: Relay and Super Bowl XLVII · See more »

Swedish Board for Computing Machinery

The Swedish Board for Computing Machinery (Matematikmaskinnämnden, MMN), was a Swedish government agency which built Sweden's first computers, BARK and BESK.

New!!: Relay and Swedish Board for Computing Machinery · See more »

Swimming (sport)

Swimming is an individual or team sport that requires the use of ones arms and legs to move the body through water.

New!!: Relay and Swimming (sport) · See more »


In electrical engineering, a switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

New!!: Relay and Switch · See more »

Switching circuit theory

Switching circuit theory is the mathematical study of the properties of networks of idealized switches.

New!!: Relay and Switching circuit theory · See more »

Sydenham rail disaster

The Sydenham rail disaster occurred on 19 December 1953 when a New South Wales Government Railways electric passenger train travelling to Bankstown ran into the rear of another electric train travelling to East Hills at Sydenham.

New!!: Relay and Sydenham rail disaster · See more »

Synchronization (alternating current)

In an alternating current electric power system, synchronization is the process of matching the speed and frequency of a generator or other source to a running network.

New!!: Relay and Synchronization (alternating current) · See more »

Synchronous Data Link Control

Synchronous Data Link Control (SDLC) is a computer communications protocol.

New!!: Relay and Synchronous Data Link Control · See more »

Tabulating machine

The tabulating machine was an electromechanical machine designed to assist in summarizing information stored on punched cards.

New!!: Relay and Tabulating machine · See more »

Tail lift

A tail lift (term used in the UK, also called a "liftgate" in North America) is a mechanical device permanently installed on the rear of a work truck, van, or lorry, and is designed to facilitate the materials handling of goods from ground level or a loading dock to the level of the vehicle bed, or vice versa.

New!!: Relay and Tail lift · See more »

Tech Model Railroad Club

The Tech Model Railroad Club (TMRC) is a student organization at the Massachusetts Institute of Technology (MIT).

New!!: Relay and Tech Model Railroad Club · See more »

Technological singularity

The technological singularity (also, simply, the singularity) is the hypothesis that the invention of artificial superintelligence (ASI) will abruptly trigger runaway technological growth, resulting in unfathomable changes to human civilization.

New!!: Relay and Technological singularity · See more »

Telegraph sounder

A telegraph sounder is an antique electromechanical device used as a receiver on electrical telegraph lines during the 19th century.

New!!: Relay and Telegraph sounder · See more »


The original meaning of telemeter, and still one of the main uses of the word, was a device used to measure distances to remote objects, that is, a rangefinder.

New!!: Relay and Telemeter · See more »

Telenor Maritim Radio

Telenor Maritim Radio is a division of Telenor which provides maritime telecommunication services along the coast of Norway.

New!!: Relay and Telenor Maritim Radio · See more »

Telephone exchange

A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises.

New!!: Relay and Telephone exchange · See more »

Tennis for Two

Tennis for Two is a sports video game developed in 1958, which simulates a game of tennis, and was one of the first games developed in the early history of video games.

New!!: Relay and Tennis for Two · See more »

Terminal equipment

In telecommunication, the term terminal equipment has the following meanings.

New!!: Relay and Terminal equipment · See more »


A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors.

New!!: Relay and Thermistor · See more »


A thermostat is a component which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint.

New!!: Relay and Thermostat · See more »

Through-hole technology

Through-hole technology (tht), also spelled "thru-hole", refers to the mounting scheme used for electronic components that involves the use of leads on the components that are inserted into holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side either by manual assembly (hand placement) or by the use of automated insertion mount machines.

New!!: Relay and Through-hole technology · See more »


A thyratron is a type of gas-filled tube used as a high-power electrical switch and controlled rectifier.

New!!: Relay and Thyratron · See more »

Time switch

A time switch (also called a timer switch, or simply timer) is a timer that operates an electric switch controlled by the timing mechanism.

New!!: Relay and Time switch · See more »

Timeline of computing hardware before 1950

This article presents a detailed timeline of events in the history of computing hardware: from prehistory until 1949.

New!!: Relay and Timeline of computing hardware before 1950 · See more »

Timeline of electrical and electronic engineering

The following timeline tables list the discoveries and inventions in the history of electrical and electronic engineering.

New!!: Relay and Timeline of electrical and electronic engineering · See more »

Timeline of electromagnetism and classical optics

Timeline of electromagnetism and classical optics lists, within the history of electromagnetism, the associated theories, technology, and events.

New!!: Relay and Timeline of electromagnetism and classical optics · See more »

Timeline of historic inventions

The timeline of historic inventions is a chronological list of particularly important or significant technological inventions and the people who created the inventions.

New!!: Relay and Timeline of historic inventions · See more »

Timeline of United States inventions (before 1890)

A timeline of United States inventions (before 1890) encompasses the ingenuity and innovative advancements of the United States within a historical context, dating from the Colonial Period to the Gilded Age, which have been achieved by inventors who are either native-born or naturalized citizens of the United States.

New!!: Relay and Timeline of United States inventions (before 1890) · See more »


A timer is a specialized type of clock used for measuring specific time intervals.

New!!: Relay and Timer · See more »

Track circuit

A track circuit is a simple electrical device used to detect the absence of a train on rail tracks, used to inform signallers and control relevant signals.

New!!: Relay and Track circuit · See more »


A tradesman, tradesperson, tradie or skilled tradesman refers to a worker who specializes in a particular occupation that requires work experience, on-the-job training, and often formal vocational education, but often not a bachelor's degree.

New!!: Relay and Tradesman · See more »

Traffic light control and coordination

The normal function of traffic lights requires more than slight control and coordination to ensure that traffic and pedestrians move as smoothly, and safely as possible.

New!!: Relay and Traffic light control and coordination · See more »

Transmission gate

A transmission gate (TG) is similar to a relay that can conduct in both directions or block by a control signal with almost any voltage potential.

New!!: Relay and Transmission gate · See more »

Transmission Voie-Machine

Transmission Voie-Machine (TVM, English: track-to-train transmission) is a form of in-cab signalling originally deployed in France and used on high-speed railway lines.

New!!: Relay and Transmission Voie-Machine · See more »

Trembler coil

A trembler coil or vibrator coil is a type of high-voltage ignition coil used in the ignition system of early automobiles, most notably the Benz Patent-Motorwagen and the Ford Model T. Its distinguishing feature is a vibrating magnetically-activated contact called a trembler or interrupter, which breaks the primary current, generating multiple sparks during each cylinder's power stroke.

New!!: Relay and Trembler coil · See more »


TRIAC, from triode for alternating current, is a generic trademark for a three terminal electronic component that conducts current in either direction when triggered.

New!!: Relay and TRIAC · See more »

TTI, Inc.

TTI, Inc. is a specialty distributor of electronic components that include, but are not limited to: capacitors, resistors, connectors, switches, relays, circuit protection, electromagnetics, discrete semiconductors, sensors, RF modules, antennas, and more.

New!!: Relay and TTI, Inc. · See more »

Tube socket

Tube sockets are electrical sockets into which vacuum tubes (also known as valves) can be plugged, holding them in place and providing terminals, which can be soldered into the circuit, for each of the pins.

New!!: Relay and Tube socket · See more »


The ULN2003A is an array of seven NPN Darlington transistors capable of 500 mA, 50 V output.

New!!: Relay and ULN2003A · See more »

Union Switch & Signal

Union Switch and Signal (US&S) is a supplier of railway signaling equipment, systems and services in Pittsburgh, Pennsylvania.

New!!: Relay and Union Switch & Signal · See more »

Unit record equipment

Starting at the end of the nineteenth century, well before the advent of electronic computers, data processing was performed using electromechanical machines called unit record equipment, electric accounting machines (EAM) or tabulating machines.

New!!: Relay and Unit record equipment · See more »

University of Western Ontario Faculty of Engineering

The University of Western Ontario Faculty of Engineering, also known as Western Engineering, is an accredited engineering faculty within the University of Western Ontario, located in London, Ontario.

New!!: Relay and University of Western Ontario Faculty of Engineering · See more »


UTEC was a computer built at the University of Toronto (UofT) in the early 1950s.

New!!: Relay and UTEC · See more »

Utilization categories

In electrical engineering utilization categories are defined by IEC standards and indicate the type of electrical load and duty cycle of the loads to ease selection of contactors and relays.

New!!: Relay and Utilization categories · See more »

Vacuum tube

In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

New!!: Relay and Vacuum tube · See more »

Vibrator (electronic)

In electronics before the development of switch-mode power supplies and the introduction of semiconductor devices operating off low voltage, there was a requirement to generate voltages of about 50 to 250V DC from vehicle batteries.

New!!: Relay and Vibrator (electronic) · See more »

Virtual sensor network

Virtual sensor networks (VSNs) is an emerging form of collaborative wireless sensor networks.

New!!: Relay and Virtual sensor network · See more »

Vista Ridge Tunnels

The Vista Ridge Tunnels are highway tunnels through the Tualatin Mountains ("West Hills") of Portland, Oregon, United States.

New!!: Relay and Vista Ridge Tunnels · See more »

Vladimir Igorevich Gurevich

Vladimir Igorevich Gurevich (Russian: Владимир Игоревич Гуревич) is a prominent scientist, inventor and author in the field of Electrical Engineering with 15 books, more than 200 journal papers and over 100 patents on the topic of relays.

New!!: Relay and Vladimir Igorevich Gurevich · See more »

Voltage regulator

A voltage regulator is an electronic circuit that provides a stable DC voltage independent of the load current, temperature and AC line voltage variations.

New!!: Relay and Voltage regulator · See more »

Voltage-sensitive relay

A voltage-sensitive relay (VSR) is a relay used for automotive, truck and marine applications.

New!!: Relay and Voltage-sensitive relay · See more »

Wedge base

W2.1x9.5d base, a common 5-watt bulb in landscape lighting and some interior automotive applications such as the dome light A wedge base is a type of electrical connector used as a fitting for small light bulbs.

New!!: Relay and Wedge base · See more »


WGTV channel 8 is the metro Atlanta station and flagship for Georgia Public Broadcasting (formerly Georgia Public Television), Georgia's Public Broadcasting Service (PBS) state network.

New!!: Relay and WGTV · See more »

Whisker (metallurgy)

Metal whiskering is a phenomenon which occurs in electrical devices when metals form long whisker-like projections over time.

New!!: Relay and Whisker (metallurgy) · See more »

White matter

White matter refers to areas of the central nervous system (CNS) that are mainly made up of myelinated axons, also called tracts.

New!!: Relay and White matter · See more »

Wigwag (railroad)

Wigwag is the nickname given to a type of railroad grade crossing signal once common in North America, named for the pendulum-like motion it used to signal the approach of a train.

New!!: Relay and Wigwag (railroad) · See more »

Wire spring relay

A wire spring relay is a type of relay, that has springs made from drawn wires of nickel silver, rather than cut from flat sheet metal as in the flat-spring relay.

New!!: Relay and Wire spring relay · See more »

Women's Little 500

The Women's Little 500 is a bicycle race held annually at Bill Armstrong Stadium on the campus of Indiana University Bloomington.

New!!: Relay and Women's Little 500 · See more »

Wrexham-Rhos transmitting station

The Wrexham-Rhos transmitting station is a digital television relay of Moel-y-Parc, and forms part of the Wales television region.

New!!: Relay and Wrexham-Rhos transmitting station · See more »

Wrong-side failure

A wrong-side failure describes a failure condition in a piece of railway signalling equipment that results in an unsafe state.

New!!: Relay and Wrong-side failure · See more »


WUBL FM 94.9, known as "94-9 the Bull", is an Atlanta FM radio station that plays country music.

New!!: Relay and WUBL · See more »

X10 (industry standard)

X10 is a protocol for communication among electronic devices used for home automation (domotics).

New!!: Relay and X10 (industry standard) · See more »

Xi'an Y-20

The Xi'an Y-20 is a large military transport aircraft.

New!!: Relay and Xi'an Y-20 · See more »

Yaesu FT-221

The Yaesu FT-221 is a modular VHF 2M all mode (SSB, AM, CW and FM) amateur radio transceiver, built by the Yaesu Corporation in Japan during the 1970s.

New!!: Relay and Yaesu FT-221 · See more »

Yokomo YZ-834B

Yokomo YZ-834B "Dog Fighter" is a 1/10 scale electric-powered 4WD radio-controlled vehicle made by Yokomo.

New!!: Relay and Yokomo YZ-834B · See more »

Z11 (computer)

The Z11 was a computer, the first serially produced machine of the Zuse KG.

New!!: Relay and Z11 (computer) · See more »

Z2 (computer)

The Z2 was a mechanical and relay computer completed by Konrad Zuse in 1940.

New!!: Relay and Z2 (computer) · See more »

Z3 (computer)

The Z3 was a German electromechanical computer designed by Konrad Zuse.

New!!: Relay and Z3 (computer) · See more »

Zone valve

A zone valve is a specific type of valve used to control the flow of water or steam in a hydronic heating or cooling system.

New!!: Relay and Zone valve · See more »

1835 in science

The year 1835 in science and technology involved some significant events, listed below.

New!!: Relay and 1835 in science · See more »

1940 in science

The year 1940 in science and technology involved some significant events, listed below.

New!!: Relay and 1940 in science · See more »

1945 in the United States

Events from the year 1945 in the United States.

New!!: Relay and 1945 in the United States · See more »


No description.

New!!: Relay and 1947 · See more »

1947 in science

The year 1947 in science and technology involved some significant events, listed below.

New!!: Relay and 1947 in science · See more »

19th century

The 19th century was a century that began on January 1, 1801, and ended on December 31, 1900.

New!!: Relay and 19th century · See more »

2006 in Canada

Events from the year 2006 in Canada.

New!!: Relay and 2006 in Canada · See more »

2012 India blackouts

Two severe power blackouts affected most of northern and eastern India on 30 and 31 July 2012.

New!!: Relay and 2012 India blackouts · See more »


In Canada and the United States, the 711 telephone number is used for the Telecommunications Relay Service to translate from TDD for the deaf to speech, and vice versa.

New!!: Relay and 7-1-1 · See more »

Redirects here:

3000 Type Relay, 600 Type Relay, Bistable relay, Coaxial relay, Control relay, Electric relay, Electrical relay, Electromechanical relay, Impulse relay, Keep relay, Latching relay, Mercury-wetted relay, Overload protection relay, Relay switch, Relays, Stay relay.


[1] https://en.wikipedia.org/wiki/Relay

Hey! We are on Facebook now! »