Posted on 18-07-2010 by microbuzzer
Buzzers: piezoelectric PZT film sound effects, infinite DC resistance, AC impedance is great;
Moving coil speaker: permanent magnetic field in general is driven cone vibrating voice coil, DC resistance is almost 0, EIS general a few dozen in Europe to Europe;
Buzzer: the need for a larger voltage to drive, but the current is very small, a [...]
Tags: Active buzzer, Buzzer, difference, passive buzzer
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Posted on 17-07-2010 by microbuzzer
Electromagnetic and piezoelectric buzzer is divided into two major categories of style
Electromagnetic buzzer is electromagnetic theory, power absorption when the metal diaphragm, the diaphragm is not under power when the elastic bounce. Passive magnetic buzzer to 1 / 2 square wave drive, magnetic buzzer, can be issued with a 1.5V 85dB SPL above, and the [...]
Tags: Buzzer, Categories
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Posted on 16-07-2010 by microbuzzer
How to better grasp the buzzer test, method?
Buzzer exterior inspection
Buzzer surface of uniform, smooth, no distortion, warping phenomenon. Aluminum without grooves, riveting sound, no loose gaps. Silver layer is smooth, no rupture phenomenon. Lead without damage, even joints, bright, without drawing sharp, Weld, and loose soldering phenomenon.
Tags: Buzzer, method, test
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Posted on 15-07-2010 by microbuzzer
Different according to the driving signal, the sound is divided into self-excited oscillation and his second category, there are many different versions, but the means are these two categories,
Such as: contains (not including) line, DC DC / AC AC Type, active (passive),
Tags: Active buzzer, Buzzer, passive buzzer
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Posted on 15-07-2010 by microbuzzer
Many different kinds of buzzer, one must know a few parameters (voltage, current, drive method, size, connection / fixed mode), of course, more importantly, want to be sound (sound pressure size, frequency of high and low),
Operating voltage: electromagnetic buzzer, from 1.5 to 24V, piezoelectric from 3V to 220V are possible, but in general piezoelectric or [...]
Tags: Buzzer, quality buzzer
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Posted on 15-07-2010 by microbuzzer
Buzzer piezoelectric and electromagnetic into the two categories:
Piezoelectric buzzer is the piezoelectric effect to drive the vibration of the vocal pieces of metal;
Electromagnetic buzzer, it is the principle of electromagnetic, power absorption when the metal diaphragm, the diaphragm is not under power when the elastic rebound,
Therefore, the piezoelectric buzzer is driven by a square wave, [...]
Tags: Buzzer, electromagnetic, Piezoelectric
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Posted on 14-07-2010 by microbuzzer
About buzzer Case Material
ABS: is acrylonitrile, butadiene, styrene plastics
Acrylonitrile, butadiene, styrene monomer graft polymerization of three products, take them to the first letter of the English name names. It is a high strength, good toughness, good overall performance resin, widely used, commonly used for engineering plastics. Industry mostly polybutadiene rubber latex or styrene-based chain of [...]
Tags: Buzzer, Case Material
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Posted on 18-05-2009 by microbuzzer
Piezoelectric buzzer as the audio signal generator has a wide range of uses, low power consumption as they are, sound clarity and penetration. External buzzer drive circuit or drive circuit requirements of oscillation in the resonant frequency of piezoelectric components. Piezoelectric element at its resonant frequency to provide the maximum output sound pressure. However, a [...]
Tags: Buzzer, drive, Piezoelectric, Resonance frequency
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Posted on 18-05-2009 by microbuzzer
This is used in the lift button on a circuit through the hardware circuit to achieve the buzzer background about the driver as follows:
1. Due to the limited space available in the circuit can only choose SMD passive buzzer (original height-saving considerations, the high active), which implies the need for oscillation circuit, he can work.
2. [...]
Tags: Buzzer, circuit, drive, Passive
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Posted on 18-05-2009 by microbuzzer
Piezoelectric film is the buzz of high pressure after extreme pressure of the piezoelectric ceramic adhesive film on the vibration of sheet metal. When Add AC voltage, it will because the piezoelectric effect, and the generation of mechanical deformation of stretching and shrinkage of the use of This allows the issue of sheet metal vibration [...]
Tags: Buzzer, Piezoelectric, principle, structure
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