CN102419970A - Alarm buzzer - Google Patents
Alarm buzzer Download PDFInfo
- Publication number
- CN102419970A CN102419970A CN2011103891945A CN201110389194A CN102419970A CN 102419970 A CN102419970 A CN 102419970A CN 2011103891945 A CN2011103891945 A CN 2011103891945A CN 201110389194 A CN201110389194 A CN 201110389194A CN 102419970 A CN102419970 A CN 102419970A
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- crystal oscillator
- triode
- resistance
- buzzer
- control circuit
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Abstract
An alarm buzzer comprises a buzzer and a control circuit, wherein the control circuit comprises a variable resistance, a crystal oscillator, a monopolar crystal oscillator, a triode, a power source, an alarm chip and a plurality of resistance; after the variable resistance and the crystal oscillator are added in the control circuit, the circuit output is relatively stable; the volume size of the buzzer can be changed by adjusting the resistivity of the variable resistance; the crystal oscillator can stabilize the circuit and enables the buzzer to produce sound at a certain frequency, thereby monotonous buzzing is avoided; and the buzzer can give out rhythmical warning tone so that users feel comfortable and sweet-sounding.
Description
Technical field
The present invention relates to a kind of hummer, particularly relate to a kind of alarm buzzer.
Background technology
Pronunciation device adopts hummer mostly at present, and is as shown in Figure 1, adopts an output port just can control its sounding well; Control circuit is simple, as long as the square wave of importing about 4kHz at circuit input end just can make the hummer sounding, software is realized easily; Its shortcoming is when the signal input; Hummer can only send a kind of sound, and sound is dull, and the user is felt comfortably cool.
Summary of the invention
Technical matters to be solved by this invention provides a kind of alarm buzzer, and this hummer can send rhythmical prompt tone, makes the user feel comfortable melodious.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of alarm buzzer; Comprise hummer and control circuit; Said control circuit is made up of variable resistor, crystal oscillator, one pole crystal oscillator, triode, power supply, alarm chip and a plurality of resistance, and said positive source links to each other with power cathode with the one pole crystal oscillator through resistance, constitutes a closed-loop path; The base stage of said triode is connected with resistance; The collector of triode is connected with variable resistor, and the emitter of triode links to each other with power cathode, and said crystal oscillator is connected between positive source and the variable resistor; Two pin positions of said alarm chip are connected in parallel on the base stage and the emitter two ends of triode, and the 3rd pin position is connected between resistance and the one pole crystal oscillator.
The invention has the beneficial effects as follows: after having added variable resistor and crystal oscillator, the output of circuit is relatively stable, and can pass through to regulate variable-resistance resistance, and then changes the volume of hummer; Crystal oscillator can stabilizing circuit, and makes hummer become the sounding of certain frequency, the buzzer that avoids monotony.
Description of drawings
Fig. 1 is the synoptic diagram of existing pronunciation device.
Fig. 2 is a profile synoptic diagram of the present invention.
Fig. 3 is the synoptic diagram of control circuit of the present invention.
Wherein: 1-control circuit, 2-hummer, 3-alarm chip, 4-variable resistor, 5-1-resistance, 5-2-resistance, 6-crystal oscillator, 7-one pole crystal oscillator, V0-triode.
Embodiment
In order to deepen to understanding of the present invention, will combine embodiment that the present invention is made further detailed description below, this embodiment only is used to explain the present invention, does not constitute the qualification to protection domain of the present invention.
Like Fig. 1,2, shown in 3, the synoptic diagram of at present common pronunciation device is as shown in Figure 1, adopts its sounding of port controlling, and control circuit is simple, and input port needs only the square wave of importing about 4kHz at circuit just can make hummer 2 sounding.
Hummer profile of the present invention is cylindrical, and there are two leads the below.The present invention can be connected in the various circuit and report to the police.
Below in conjunction with description of drawings the preferred embodiments of the present invention: a kind of alarm buzzer; Comprise hummer 2 and control circuit 1; Control circuit is made up of variable resistor 4, crystal oscillator 6, one pole crystal oscillator 7, triode V0, power supply, alarm chip 3 and a plurality of resistance, and said positive source links to each other with power cathode with one pole crystal oscillator 7 through resistance 5-1, constitutes a closed-loop path; The base stage of said triode V0 is connected with resistance 5-2; The collector of triode V0 is connected with variable resistor 4, and the emitter of triode V0 links to each other with power cathode, and said crystal oscillator 6 is connected between positive source and the variable resistor 4; Two pin positions of said alarm chip 3 are connected in parallel on base stage and the emitter two ends of triode V0, and the 3rd pin position is connected between resistance 5-1 and the one pole crystal oscillator 7.
The rated voltage of hummer 2 is 12V, voltage range between 10 ~ 14V, rated current≤55mA, sound pressure level>=90dB.
After having added variable resistor 4 and crystal oscillator 6, the output of circuit is relatively stable, and can pass through to regulate the resistance of variable resistor 4, and then changes the volume of hummer 2; Crystal oscillator 6 can stabilizing circuit, and makes the sounding of 2 one-tenth certain frequencies of hummer, the buzzer that avoids monotony.
Claims (2)
1. alarm buzzer; It is characterized in that: comprise hummer (2) and control circuit (1); Said control circuit is made up of variable resistor (4), crystal oscillator (6), one pole crystal oscillator (7), triode (V0), power supply, alarm chip (3) and a plurality of resistance; Said positive source links to each other with power cathode with one pole crystal oscillator (7) through resistance (5-1); Constitute a closed-loop path, the base stage of said triode (V0) is connected with resistance (5-2), and the collector of triode (V0) is connected with variable resistor (4); The emitter of triode (V0) links to each other with power cathode; Said crystal oscillator (6) is connected between positive source and the variable resistor (4), and two pin positions of said alarm chip (3) are connected in parallel on the base stage and the emitter two ends of triode (V0), and the 3rd pin position is connected between resistance (5-1) and the one pole crystal oscillator (7).
2. alarm buzzer as claimed in claim 1 is characterized in that: the rated voltage of said hummer (2) is 12V, voltage range between 10 ~ 14V, rated current≤55mA, sound pressure level>=90dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103891945A CN102419970A (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103891945A CN102419970A (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102419970A true CN102419970A (en) | 2012-04-18 |
Family
ID=45944353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103891945A Pending CN102419970A (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102419970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108091320A (en) * | 2017-12-18 | 2018-05-29 | 兴化市天华机电有限公司 | A kind of buzzer for clock and watch |
| CN108806658A (en) * | 2017-05-03 | 2018-11-13 | 深圳市帝迈生物技术有限公司 | A kind of blood analyser and its buzzer volume adjust driving circuit |
-
2011
- 2011-11-30 CN CN2011103891945A patent/CN102419970A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108806658A (en) * | 2017-05-03 | 2018-11-13 | 深圳市帝迈生物技术有限公司 | A kind of blood analyser and its buzzer volume adjust driving circuit |
| CN108806658B (en) * | 2017-05-03 | 2024-04-16 | 深圳市帝迈生物技术有限公司 | Blood analyzer and buzzer volume adjustment driving circuit thereof |
| CN108091320A (en) * | 2017-12-18 | 2018-05-29 | 兴化市天华机电有限公司 | A kind of buzzer for clock and watch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120418 |