Electric Bells and Buzzers: Difference between revisions
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[[File:ElectricBell.jpg|300px|right]] | [[File:ElectricBell.jpg|300px|right]] | ||
[http://en.wikipedia.org/wiki/Electric_bell '''Electric bells'''] are electromagnetic devices with contacts arranged so that once the coil is energized the [http://en.wikipedia.org/wiki/Armature_%28electrical_engineering%29 '''armature'''] is attracted to it and the circuit is broken. | [http://en.wikipedia.org/wiki/Electric_bell '''Electric bells'''] are electromagnetic devices with contacts arranged so that once the coil is energized the [http://en.wikipedia.org/wiki/Armature_%28electrical_engineering%29 '''armature'''] is attracted to it and the circuit is broken. | ||
Once broken the coil is de-energized and the armature springs back to complete the circuit once more. | Once broken the coil is de-energized and the armature springs back to complete the circuit once more. | ||
Each time the armature is attracted to the coil the hammer strikes the bell. This continues in an oscillatory manner until the power is switched off. | Each time the armature is attracted to the coil the hammer strikes the bell. This continues in an oscillatory manner until the power is switched off. | ||
Bells normally work on low voltage typically 6 volts. Bells are used as outputs for alarm circuits. | Bells normally work on low voltage typically 6 volts. Bells are used as outputs for alarm circuits. | ||
[[File:Buzzer.jpg|200px|right]] | |||
[http://en.wikipedia.org/wiki/Buzzer '''Buzzers'''] are usually of the single tone variety and are normally rated between 6 and 24 volts. | |||
They are suitable for alarm circuits, test equipment, timing and control. | They are suitable for alarm circuits, test equipment, timing and control. | ||
To achieve maximum sound ouput from the device it should be firmly mounted. | To achieve maximum sound ouput from the device it should be firmly mounted. | ||
Revision as of 13:56, 1 June 2015
Electric bells are electromagnetic devices with contacts arranged so that once the coil is energized the armature is attracted to it and the circuit is broken.
Once broken the coil is de-energized and the armature springs back to complete the circuit once more.
Each time the armature is attracted to the coil the hammer strikes the bell. This continues in an oscillatory manner until the power is switched off.
Bells normally work on low voltage typically 6 volts. Bells are used as outputs for alarm circuits.
Buzzers are usually of the single tone variety and are normally rated between 6 and 24 volts.
They are suitable for alarm circuits, test equipment, timing and control.
To achieve maximum sound ouput from the device it should be firmly mounted.