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  2. Reed switch - Wikipedia

    en.wikipedia.org/wiki/Reed_switch

    Commonly-used circuit symbol Operation of the reed switch The reed switch [ i ] is an electromechanical switch operated by an applied magnetic field . It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [ 1 ] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into ...

  3. Reed relay - Wikipedia

    en.wikipedia.org/wiki/Reed_relay

    A reed relay [i] is a type of relay that uses an electromagnet to control one or more reed switches. The contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Sealed in a long, narrow glass tube, the contacts are protected from corrosion. The glass envelope may contain multiple ...

  4. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    Relay. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.

  5. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    Contactor with overload relay. A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load. Magnetic starters also provide under-voltage and overload protection and an automatic cutoff in the event of a power failure.

  6. Solenoid valve - Wikipedia

    en.wikipedia.org/wiki/Solenoid_valve

    A solenoid valve is an electromechanically operated valve . Solenoid valves differ in the characteristics of the electric current they use, the strength of the magnetic field they generate, the mechanism they use to regulate the fluid, and the type and characteristics of fluid they control. The mechanism varies from linear action, plunger-type ...

  7. Electronic switch - Wikipedia

    en.wikipedia.org/wiki/Electronic_switch

    Hall switches are a type of Hall sensor that combine the analog Hall effect with threshold detection to produce a magnetically-operated switch. The opto-isolator uses light from an LED controlled by a current which is received by a phototransistor to switch a galvanically-isolated circuit.

  8. Bosch will use tiny explosions to make EVs safer in a crash

    www.engadget.com/2019-10-01-bosch-ev-battery...

    The pyrotechnical safety switch system, or pyrofuse, sets off a series of small explosions. Those drive a wedge into the high-voltage cable linking the battery and the power electronics ...

  9. Contactor - Wikipedia

    en.wikipedia.org/wiki/Contactor

    Contactor. A contactor is an electrically controlled switch used for switching an electrical power circuit. [1] A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch. Unlike general-purpose relays, contactors are ...

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