CN103390401A - High-loudness buzzer - Google Patents
High-loudness buzzer Download PDFInfo
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- CN103390401A CN103390401A CN2013103449094A CN201310344909A CN103390401A CN 103390401 A CN103390401 A CN 103390401A CN 2013103449094 A CN2013103449094 A CN 2013103449094A CN 201310344909 A CN201310344909 A CN 201310344909A CN 103390401 A CN103390401 A CN 103390401A
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Abstract
The invention provides a high-loudness buzzer which is characterized by comprising a 9V direct current power source, an astable multivibrator circuit and a buzzing output circuit, wherein the astable multivibrator circuit comprises a time-base circuit IC1, a resistor R1, a resistor R2, a potentiometer RP and a capacitor C1, and the type of the time-base circuit IC1 is NE555. Although a common weldable type buzzer has the advantages of convenience in use and wide application range, the buzzing output power is small, and the buzzing coverage area is extremely limited, so that the common weldable type buzzer is not suitable for a few of noisy places; and in order to solve the problem of small power of the weldable type buzzer, the high-loudness buzzer only adopts a small quantity of common components to achieve an intended purpose through tests, analysis and comparison of various schemes.
Description
Technical field
The invention belongs to electronic technology field, relate to a kind of high loudness hummer.
Background technology
Its parameter of solderable hummer commonly used is that ￠ 10, operating voltage are 3～15V, working current≤7mA, electronic circuit is contained in hummer inside, as: the CPB14A12-4.0 type carries source of sound minisize dc piezoelectric buzzer, it contains the active acoustical generator of oscillatory circuit and piezoelectric ceramic piece, it does not need additional audio drive circuitry, and connecting direct supply can sounding.Although it is easy to use, applied widely that it has advantages of, its buzzer output power is little, and the buzzer coverage is also very limited, and some noisy occasion is inapplicable.
For solving little this problem of solderable hummer power, through kinds of schemes test, analysis and comparison, high loudness hummer of the present invention only uses a small amount of common components and parts namely to realize the expection purpose.
The circuit that below illustrates high loudness hummer of the present invention related correlation technique content in implementation process.
Summary of the invention
Goal of the invention and beneficial effect: although solderable hummer commonly used it have advantages of easy to usely, applied widely, its buzzer output power is little, the buzzer coverage is also very limited, some noisy occasion is inapplicable.For solving little this problem of solderable hummer power, through kinds of schemes test, analysis and comparison, high loudness hummer of the present invention only uses a small amount of common components and parts namely to realize the expection purpose.
The circuit working principle: it forms the stable multi-oscillation circuit by time base circuit IC1 and resistance R 1, resistance R 2, potentiometer RP and capacitor C 1.After buzzer circuit was connected the 9V direct supply, because the voltage on capacitor C 1 is very low, the 3rd pin of time base circuit IC1 output terminal was high level.The 9V direct supply charges to capacitor C 1 through resistance R 1, resistance R 2 and potentiometer RP, voltage on capacitor C 1 progressively rises, when the voltage on capacitor C 1 rises to 2/3 direct supply voltage, the upset of time base circuit IC1 internal trigger, the 3rd pin output low level of time base circuit IC1, the internal discharge pipe conducting of time base circuit IC1 simultaneously, capacitor C 1 power on to press off and begin through the 7th pin discharge of resistance R 2 by time base circuit IC1.When the voltage drop on capacitor C 1 during to 1/3 direct supply voltage, time base circuit IC1 internal trigger overturns again, the 3rd pin output high level of time base circuit IC1, internal discharge pipe cut-off simultaneously, the 9V direct supply charges to capacitor C 1 through resistance R 1, resistance R 2 and potentiometer RP again, so goes round and begins again and forms vibration.
Technical characterictic: high loudness hummer, it comprises 9V direct supply, stable multi-oscillation circuit and buzzer output circuit, it is characterized in that:
The stable multi-oscillation circuit: it is comprised of time base circuit IC1, resistance R 1, resistance R 2, potentiometer RP and capacitor C 1, the model that time base circuit IC1 selects is NE555, the anodal VCC of one termination circuit of the 4th pin of time base circuit IC1 and the 8th pin and resistance R 1, the 7th pin of time base circuit IC1 is connected with an end of the other end of resistance R 1, resistance R 2, the end of another termination potentiometer RP of resistance R 2, the 6th pin of time base circuit IC1 is connected with the other end and the movable end thereof of potentiometer RP with the 2nd pin, the 1st pin connection circuit ground GND of time base circuit IC1;
The buzzer output circuit: the 3rd pin of time base circuit IC1 connects the positive pole of electrochemical capacitor C2, and the negative pole of electrochemical capacitor C2 connects the end of piezoelectricity singing piece HA, the other end connection circuit ground GND of piezoelectricity singing piece HA;
The anodal VCC of 9V dc power anode connection circuit, the 9V dc power cathode is connected with circuit ground GND.
Description of drawings
Accompanying drawing is the embodiment circuit working schematic diagram that the invention provides a high loudness hummer; 9V dc power cathode in accompanying drawing is connected with circuit ground GND.
Embodiment
According to high loudness buzzer circuit fundamental diagram shown in the drawings and description of drawings, and according to annexation between components and parts in the described each several part circuit of summary of the invention, and the components and parts technical parameter described in embodiment requires and the circuit production main points are implemented to realize the present invention, below in conjunction with embodiment, correlation technique of the present invention is further described.
The selection of components and parts and technical parameter thereof
IC1 is time base circuit, and the model of selecting is NE555 or LM555, and packing forms is dual inline type 8 pins; Each pin function: 1 pin is circuit ground GND; 2 pin are trigger end; 3 pin output terminals; 4 pin preset ends; 5 pin are for controlling voltage; 6 pin thresholdings (threshold value); 7 pin are discharge end; 8 pin are positive source VCC;
The resistance of resistance R 1 is 6.8K Ω; The resistance of resistance R 2 is 2.2K Ω; The resistance of potentiometer RP is 12K Ω;
C1 is polypropylene capactive, and capacity is 0.022 μ F; C2 is electrochemical capacitor, and capacity is 1000 μ F/25V;
HA is piezoelectricity singing piece, diameter ￠ 42mm, and maximum sound intensity is 110dB, the diameter of piezoelectricity singing piece can not be less than 30mm, otherwise the responding range of frequency will be affected;
The operating voltage range of 9V direct supply is 9～12V, and the voltage of direct supply is higher, and the output power of buzzer is larger.
Circuit production main points and circuit debugging
Because of the circuit structure of high loudness hummer fairly simple, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing is welded to specifications, physical connection line and welding quality are after careful inspection is correct, circuit of the present invention does not need to carry out any debugging substantially, and connecting the 9V direct supply can work;
The electric capacity of capacitor C 1 is crucial, and it has determined the oscillation frequency of stable multi-oscillation circuit, most ceramic disc capacitor work less stable, and error is about 20%, and the polypropylene capactive of stable performance is adopted in suggestion; Because the capacity that is not easy to change capacitor C 1 changes the oscillation frequency of stable multi-oscillation circuit, to change the oscillation frequency of stable multi-oscillation circuit more convenient so the resistance of potentiometer RP is adjusted in suggestion;
The adjustment of potentiometer RP: the resistance of potentiometer RP is larger, and the oscillation frequency of stable multi-oscillation circuit is just lower.The oscillation frequency that potentiometer RP and capacitor C 1 produce is about 2.1HzK to 2.5kHz;
The complete machine maximum operating currenbt is 110mA, because circuitry is discontinuity work, so average working current is less than 95mA, therefore can use general dry battery as the 9V direct supply.
Claims (1)
1. one kind high loudness hummer, it comprises 9V direct supply, stable multi-oscillation circuit and buzzer output circuit, it is characterized in that:
Described stable multi-oscillation circuit is comprised of time base circuit IC1, resistance R 1, resistance R 2, potentiometer RP and capacitor C 1, the model that time base circuit IC1 selects is NE555, the anodal VCC of one termination circuit of the 4th pin of time base circuit IC1 and the 8th pin and resistance R 1, the 7th pin of time base circuit IC1 is connected with an end of the other end of resistance R 1, resistance R 2, the end of another termination potentiometer RP of resistance R 2, the 6th pin of time base circuit IC1 is connected with the other end and the movable end thereof of potentiometer RP with the 2nd pin, the 1st pin connection circuit ground GND of time base circuit IC1;
In described buzzer output circuit, the 3rd pin of time base circuit IC1 connects the positive pole of electrochemical capacitor C2, and the negative pole of electrochemical capacitor C2 connects the end of piezoelectricity singing piece HA, the other end connection circuit ground GND of piezoelectricity singing piece HA;
The anodal VCC of described 9V dc power anode connection circuit, the 9V dc power cathode is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103449094A CN103390401A (en) | 2013-08-09 | 2013-08-09 | High-loudness buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103449094A CN103390401A (en) | 2013-08-09 | 2013-08-09 | High-loudness buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103390401A true CN103390401A (en) | 2013-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103449094A Pending CN103390401A (en) | 2013-08-09 | 2013-08-09 | High-loudness buzzer |
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| CN (1) | CN103390401A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274801Y (en) * | 1996-07-12 | 1998-02-18 | 刘仁刚 | Contactless sounding controller for electric horn of vehicle |
| CN2590121Y (en) * | 2002-10-09 | 2003-12-03 | 乔发进 | Automobile electronic horn |
| CN2603478Y (en) * | 2003-03-06 | 2004-02-11 | 甘永平 | Environment protection type electric controlled horn for car |
| CN2870076Y (en) * | 2005-12-30 | 2007-02-14 | 哈尔滨工业大学固泰电子有限责任公司 | Self-adoptive intelligent electronic horn |
| CN201927337U (en) * | 2010-12-16 | 2011-08-10 | 西安理工大学 | Electronic lark |
-
2013
- 2013-08-09 CN CN2013103449094A patent/CN103390401A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274801Y (en) * | 1996-07-12 | 1998-02-18 | 刘仁刚 | Contactless sounding controller for electric horn of vehicle |
| CN2590121Y (en) * | 2002-10-09 | 2003-12-03 | 乔发进 | Automobile electronic horn |
| CN2603478Y (en) * | 2003-03-06 | 2004-02-11 | 甘永平 | Environment protection type electric controlled horn for car |
| CN2870076Y (en) * | 2005-12-30 | 2007-02-14 | 哈尔滨工业大学固泰电子有限责任公司 | Self-adoptive intelligent electronic horn |
| CN201927337U (en) * | 2010-12-16 | 2011-08-10 | 西安理工大学 | Electronic lark |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131113 |