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  2. Electronic lock - Wikipedia

    en.wikipedia.org/wiki/Electronic_lock

    Electric locks use magnets, solenoids, or motors to actuate the lock by either supplying or removing power. Operating the lock can be as simple as using a switch, for example an apartment intercom door release, or as complex as a biometric based access control system. There are two basic types of locks: "preventing mechanism" or operation ...

  3. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    A "fail safe" magnetic lock requires power to remain locked and typically is not suitable for high security applications, because it is possible to disable the lock by disrupting the power supply. Despite this, by adding a magnetic bond sensor to the lock and by using a power supply that includes a battery backup capability, some specialized ...

  4. Electromechanics - Wikipedia

    en.wikipedia.org/wiki/Electromechanics

    Piezoelectric devices can create sound or vibration from an electrical signal or create an electrical signal from sound or mechanical vibration. To become an electromechanical engineer, typical college courses involve mathematics, engineering, computer science, designing of machines, and other automotive classes that help gain skill in ...

  5. Smart lock - Wikipedia

    en.wikipedia.org/wiki/Smart_lock

    A smart lock is an electromechanical lock that is designed to perform locking and unlocking operations on a door when it receives a prompt via an electronic keypad, biometric sensor, access card, Bluetooth, or Wi-FI from a registered mobile device. These locks are called smart locks because they use advanced technology and Internet ...

  6. Interlock (engineering) - Wikipedia

    en.wikipedia.org/wiki/Interlock_(engineering)

    An interlock device is designed to allow a generator to provide backup power in such a way that it (a) prevents main and generator power to be connected at the same time, and (b) allows circuit breakers to operate normally without interference in the event of an overload condition. Most interlock devices for electrical systems employ a ...

  7. Today's Wordle Hint, Answer for #1275 on Sunday, December 15 ...

    www.aol.com/todays-wordle-hint-answer-1275...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1275 ahead. Let's start with a few hints.

  8. Buzzer - Wikipedia

    en.wikipedia.org/wiki/Buzzer

    Early devices were based on an electromechanical system identical to an electric bell without the metal gong. Similarly, a relay may be connected to interrupt its own actuating current, causing the contacts to buzz (the contacts buzz at line frequency if powered by alternating current) Often these units were anchored to a wall or ceiling to use it as a sounding board.

  9. Here are 12 well-known companies that went bankrupt in 2024 - AOL

    www.aol.com/12-well-known-companies-went...

    The 75-year-old hardware store brand filed for bankruptcy in October and ended its legacy by substantially selling its operations to a rival. In court filings, True Value said it faces a ...

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