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What are the advantages of piezoelectric buzzers

Piezoelectric buzzer is an electro-acoustic conversion device that produces mechanical deformation and sound due to inverse piezoelectric effect. This product is widely used in various electrical products for alarm and sounding purposes, and is generally used more in music greeting cards, electronic watches, pocket calculators and so on. In order to ensure the quality of their use, when buying and selling, we should be strict to choose the most suitable products.


1The piezoelectric buzzer has a wider range of use


In terms of the scope of use, this type of buzzer can be used in the following kinds of products, such as gas alarms, burglar alarms, speed alarms, navigators, car stereos and automotive equipment, but also in a variety of household appliances, such as air conditioners, microwave ovens, microcomputer control, toys, teaching appliances, etc.


2Can make more kinds of sound


Because the piezoelectric buzzer is controlled by electronic circuit, it can issue a variety of pleasant sounds and analog sounds and intermittent sounds. The tone is pure and not easily covered by noise.


3Ability to save power


The piezoelectric buzzer is excited by the voltage used, so the current consumption is small, generally below 20mA, and will not exceed 100mA.

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In addition to the above three advantages, the piezoelectric buzzer also does not produce flying arc or RF noise, no interference to other lines, and the sound frequency can be controlled to make the effect of high and low tone scale. In some special cases, it is also possible to multiplex a control port with the LED.


By definition, we would call a sound generator with a piezoelectric ceramic as the electroacoustic transducer a piezoelectric buzzer. In terms of components, it is mainly composed of a multi-harmonic oscillator, a piezoelectric buzzer, an impedance matcher and a resonance box, and a housing. Besides, it has the following features compared with other buzzer products.


Feature 1: The component does not produce flying arc or RF noise, does not interfere with other lines, and does not cause large vibrations due to looseness.


Feature two: It is controlled by electronic circuit, so it can issue a variety of pleasant sounds and analog and intermittent sounds. The tone is pure and not easily covered by noise.


Feature 3: The piezoelectric buzzer is easy to install and has no electromagnetic coils or moving coils, so there is no need to worry about insulation deterioration and no possibility of leakage.


Feature 4: It uses a voltage excitation method, so the current consumption is small, generally below 20ma, and will not exceed 100ma.


Method 1: Choose according to the voltage size.


The buzzer is generally driven by square wave (V P-P), the higher the voltage, the higher the volume.


Method 2: According to the size to choose.


According to the size to choose the buzzer is also a more common method, which is mainly based on the size will affect the principle of frequency. Generally small size will have a higher frequency.


Method 3: According to the pin spacing to choose.


Pin pitch can also be the reason why this factor is used to select a buzzer, mainly because there are many specifications of piezoelectric buzzers, and it is often not easy to find exactly the same specifications. In this case, we can first pick the one with the same pitch and close frequency to try.


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