Posted on 08-08-2010 by microbuzzer
Recently, a client mentioned on the buzzer, speaker of the PA cavity why the overall impact of such a big sound reasons, as follows:
We know that buzzer, speaker of the PA cavity design, is often understood as follows:
1: to have sound chamber, from the PA with, as to why should tone chamber, not sure.
2: Sealing [...]
Tags: Buzzer, sound chamber, speaker
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Posted on 08-08-2010 by microbuzzer
When welding buzzer should note the following:
A, lead-free :280-290 degrees;
B, a lead :330-350 degrees;
Substrate (copper / iron / steel) General welding time: 3S
Silver surface of general welding time: 1.5S
Tags: Buzzer, Electric soldering iron
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Posted on 08-08-2010 by microbuzzer
Buzzer Category:
1, according to the principle of sub-drive mode can be divided into: active buzzer (includes driver circuits) and passive buzzer (external drive);
Tags: Buzzer, Buzzer classification
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Posted on 08-08-2010 by microbuzzer
Buzzer resonant frequency of the piezoelectric actuator
Piezoelectric buzzer as the audio signal generator has a wide range of applications, because they are low power, voice clear and penetrating. Buzzer drive circuit or from an external drive circuit requirements oscillations in the resonant frequency of the piezoelectric element. Piezoelectric elements in its resonance frequency to provide [...]
Tags: Buzzer, Piezoelectric, resonant frequency
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Posted on 08-08-2010 by microbuzzer
Triode transistor in buzzer role is the role of the voice signal amplification. Triode is a control component, mainly used to control the current size to a total emitter Connection Example (signal from the base input, the output from the collector , emitter grounded), when the base voltage UB has a small change, base current [...]
Tags: Buzzer, Transistor's role
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Posted on 08-08-2010 by microbuzzer
The definition of the decibel value of the buzzer
DB (decibel) is mainly used for measuring short dB decibel sounds, commonly used dB that is the sound pressure level of the size of the unit.
sound pressure per doubling of sound pressure increase of 6 dB magnitude. “Sub” means one-tenth digit is a “shell”, but generally only [...]
Tags: Buzzer, decibel
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Posted on 07-08-2010 by microbuzzer
Magnetic buzzer easy way to active and passive
First, visual: the former is very similar form as the county upwards of two buzzer pin placement, you can see the green circuit board is a passive buzzer, no circuit boards with vinyl A buzzer is active closed. However, this is only the preliminary judging criteria, but not [...]
Tags: active electromagnetic buzzer, Buzzer, passive electromagnetic buzzer
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Posted on 07-08-2010 by microbuzzer
Fault Analysis of Electromagnetic buzzer
1, no do not ring before installation. – This is a quality in itself is a buzzer not work (the first one kind of buzzer such cases the probability of occurrence of more);
2, after welding when no sound or sound without sound. – This situation could be used in iron welding [...]
Tags: Buzzer, Electromagnetic buzzer, Fault
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Posted on 06-08-2010 by microbuzzer
Distinguish between active and passive buzzer
On the market because of their small size, a small buzzer (diameter only llmm), light weight, low price, solid structure, and is widely used in electrical equipment needs sound, electronic production and microcontroller circuits, etc. . From the exterior view, both the buzzer as the same, but a closer look, [...]
Tags: Buzzer, Buzzer difference
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Posted on 06-08-2010 by microbuzzer
Buzzer sound principle is current through electromagnetic coil, electromagnetic coil creates a magnetic field to drive the diaphragm sound, and therefore need a certain current to drive it, MCU IO pin output current is small, microcontroller output TTL level Basically, a buzzer driver can not, therefore need to increase a current amplification circuit. S51 Enhanced [...]
Tags: Buzzer, Buzzer driving
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