A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric. Typical uses of buzzers and beepers include alarm devices, timers and confirmation of user input such as a mouse click or keystroke.
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Mechanical [link]
A joy buzzer is an example of a purely mechanical buzzer.
Electromechanical [link]
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. Often these units were anchored to a wall or ceiling to use it as a sounding board. The word "buzzer" comes from the rasping noise that electromechanical buzzers made.
Piezoelectric [link]
A piezoelectric element may be driven by an oscillating electronic circuit or other audio signal source, driven with a piezoelectric audio amplifier. Sounds commonly used to indicate that a button has been pressed are a click, a ring or a beep.
Uses [link]
- Annunciator panels
- Electronic metronomes
- Game shows
- Microwave ovens and other household appliances
- Sporting events such as basketball games
- Electrical alarms
- Buzzers
See also [link]
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Buzzer (whirligig)
A buzzer (buzz, bullroarer, button-on-a-string), is an ancient mechanical device used for ceremonial purposes and as a toy. It is constructed by centring an object at the midpoint of a cord or thong and winding the cord while holding the ends stationary. The object is whirled by alternately pulling and releasing the tension on the cord. The whirling object makes a buzzing or humming sound, giving the device its common name.
A buzzer is often constructed by running string through two of the holes on a large button and is a common and easily made toy.
American Indians used the buzzer as a toy and, also ceremonially, as to call up the wind. Early Indian buzzers were constructed of wood, bone, or stone, and date from at least the Fourche Maline Culture, c. 500 B.C.
See also
References
Bibliography
Buzzer (disambiguation)
A buzzer is a signalling device.
Buzzer or The Buzzer may also refer to:
Vladimir Leontyevich Komarov
Vladimir Leontyevich Komarov (Russian: Влади́мир Лео́нтьевич Комаро́в; 1869–1945) was a Russian botanist.
Until his death in 1945, he was senior editor of the Flora SSSR (Flora of the U.S.S.R.), in full comprising 30 volumes published between 1934–1960. He was elected a corresponding member of the Russian Academy of Sciences in 1914 and its full member in 1920. He served as President of the Academy of Sciences of the USSR in 1936-1945.
The Komarov Botanical Institute and its associated Komarov Botanical Garden in Saint Petersburg are named after him.
References
KOM
Kom or KOM may refer to:
Cultures
Kom (song)
"Kom" (English: Come) is a song by the Swedish Europop group Timoteij. It was recorded in 2009 and written by Niclas Arn, Karl Eurén and Gustav Eurén and is the leading single of the group's debut album Längtan.
Timoteij participated in the Swedish Melodifestivalen 2010 with Kom and finished first in the third semi-final in Gothenburg, and therefore progressed to the final in the Globe Arena in Stockholm. The song finished at 5th place with a total of 95 points. It was eventually chosen to represent Sweden at the OGAE Second Chance Contest and finished at 1st place.
Track listing
(Released: February 28, 2010) (Universal)
(Released: March, 2010) (Universal)
