CN206819728U - A kind of multiple tone buzzer circuit - Google Patents
A kind of multiple tone buzzer circuit Download PDFInfo
- Publication number
- CN206819728U CN206819728U CN201720655784.0U CN201720655784U CN206819728U CN 206819728 U CN206819728 U CN 206819728U CN 201720655784 U CN201720655784 U CN 201720655784U CN 206819728 U CN206819728 U CN 206819728U
- Authority
- CN
- China
- Prior art keywords
- circuit
- buzzer
- power supply
- control
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model provides a kind of multiple tone buzzer circuit, including buzzer, micro-control unit, power supply circuit, frequency control circuit, auxiliary circuit and the first discharge circuit, the auxiliary circuit is connected with the both ends of the buzzer, the power supply circuit accesses one end of the buzzer jointly after being connected with first discharge circuit, the frequency control circuit is connected with the other end of the buzzer, the power supply control end of the micro-control unit is connected with the control terminal of the power supply circuit, the frequency control terminal of the micro-control unit is connected with the control terminal of the frequency control circuit.Buzzer can send the sound of various tones, meet different demands of the same application scenario to buzzer.
Description
Technical field
Buzzer circuit is the utility model is related to, more particularly to a kind of multiple tone buzzer circuit.
Background technology
At present, in electronics field, the application of buzzer is ubiquitous, is widely used in computer, printer, answers
Make microphone device in the electronic products such as print machine, alarm, electronic toy, vehicle electronics, telephone set, timer, and in city
Under the extremely fierce modernization intelligent control technology background of field competition, existing buzzer circuit can only export the sound of single tone
Sound, it is difficult to adapt to the different demands of same application scenario.
Utility model content
The purpose of this utility model is can only to export the sound of single tone to solve buzzer circuit in the prior art
The problem of, propose a kind of multiple tone buzzer circuit.
In order to solve the above technical problems, the utility model uses following technical scheme：
A kind of multiple tone buzzer circuit, including buzzer, micro-control unit, power supply circuit, frequency control circuit, auxiliary
Circuit and the first discharge circuit, the auxiliary circuit are connected with the both ends of the buzzer, the power supply circuit and described first
One end of the buzzer is accessed after discharge circuit series connection jointly, the other end of the frequency control circuit and the buzzer connects
Connect, the power supply control end of the micro-control unit is connected with the control terminal of the power supply circuit, the frequency of the micro-control unit
Control terminal is connected with the control terminal of the frequency control circuit.
In some preferred embodiments, in addition to volume control circuit, the volume control circuit and the power supply
Circuit is connected, and the pulse width modulation end of the micro-control unit is connected with the control terminal of the volume control circuit.
In further preferred embodiment, in addition to filter circuit, the filter circuit connect with the power supply circuit
Connect and connected with the volume control circuit.
In further preferred embodiment, the power supply circuit, frequency control circuit and volume control circuit wrap
Include triode.
In further preferred embodiment, the volume control circuit includes a NPN type triode and a PNP
Type triode.
In further preferred embodiment, the power supply circuit includes a NPN type triode and a positive-negative-positive three
Pole pipe.
In embodiment still more preferably, the grounded emitter of the NPN type triode of the volume control circuit.
In embodiment still more preferably, the grounded emitter of the NPN type triode of the power supply circuit.
In embodiment still more preferably, the filter circuit includes a filter capacitor.
In some preferred embodiments, first discharge circuit is RC discharge circuits.
Compared with prior art, the beneficial effects of the utility model have：
In the utility model, power supply circuit controls the conduction time of buzzer, within conduction time, frequency control circuit
The pronouncing frequency of buzzer is then controlled, different pronouncing frequencies is the sound of different tones, power supply circuit and FREQUENCY CONTROL electricity
The cooperation on road can make buzzer send the sound of various tones, meet different demands of the same application scenario to buzzer.
In a preferred embodiment, the utility model also has the advantages that：
Further, volume control circuit output pulse width modulated signal is to power supply circuit, i.e. pwm signal, pwm signal
Dutycycle it is bigger, the actual output voltage of power supply circuit and the ratio of ceiling voltage are bigger, namely the volume of buzzer is bigger,
Conversely, the volume of buzzer is smaller.
Brief description of the drawings
Fig. 1 is the electrical block diagram of first embodiment of the present utility model；
Fig. 2 a are the upper electric musical waveform figure of first embodiment；
Fig. 2 b are the startup music oscillogram of first embodiment；
Fig. 2 c are the shutdown musical waveform figure of first embodiment；
Fig. 3 is the electrical block diagram of second embodiment of the present utility model.
Embodiment
Embodiment of the present utility model is elaborated below.It is emphasized that the description below is only example
Property, rather than in order to limit the scope of the utility model and its application.
Specific embodiment of the present utility model provides a kind of multiple tone buzzer circuit, including buzzer, microcontroller list
Member, power supply circuit, frequency control circuit, auxiliary circuit and the first discharge circuit, the auxiliary circuit and the two of the buzzer
End connection, the power supply circuit access one end of the buzzer, the frequency jointly after being connected with first discharge circuit
Control circuit is connected with the other end of the buzzer, the power supply control end of the micro-control unit and the control of the power supply circuit
End connection processed, the frequency control terminal of the micro-control unit are connected with the control terminal of the frequency control circuit.The power supply electricity
Road, frequency control circuit and volume control circuit include triode.First discharge circuit is RC discharge circuits.Specifically
Operation principle refer to first embodiment described later.
Multiple tone buzzer circuit also includes volume control circuit, and the volume control circuit connects with the power supply circuit
Connect, the pulse width modulation end of the micro-control unit is connected with the control terminal of the volume control circuit.Specific work is former
Reason refer to second embodiment described later.
First embodiment
With reference to figure 1, Fig. 2 a to Fig. 2 c.
With reference to figure 1, the multiple tone buzzer circuit of the present embodiment include buzzer 1, micro-control unit 2, power supply circuit 3,
Frequency control circuit 4, the discharge circuit 6 of auxiliary circuit 5 and first.
With reference to figure 1, buzzer 1 can send sound after powered up；Micro-control unit 2 is used for output control signal；Power supply electricity
Road 3 is used to power to buzzer 1；Frequency control circuit 4 is used for the pronouncing frequency for controlling buzzer 1；Auxiliary circuit 5 is used for buzzing
Device 1 discharges；First discharge circuit 6 discharges after the power-off of power supply circuit 3 powers to buzzer 1.Auxiliary circuit 5 and buzzer 1
Both ends 101 and 102 connect, one end 101 of the common access buzzer 1 after being connected with the first discharge circuit 6 of power supply circuit 3, frequency
Control circuit 4 is connected with the other end 102 of buzzer 1, the power supply control end 201 of micro-control unit 2 and the control of power supply circuit 3
The connection of end 301, the frequency control terminal 202 of micro-control unit 2 are connected with the control terminal 401 of frequency control circuit 4.
Auxiliary circuit 5 is a discharge resistance R5, in parallel with buzzer 1.Power supply circuit 3 is a PNP type triode Q3,
Q3 base stage namely control terminal 301 is connected with the power supply control end 201 of micro-control unit 2, and Q3 emitter stage is then with power supply (in figure
Be not shown) positive pole connection.First discharge circuit 6 is a RC discharge circuit, including discharge capacity EC6 and resistance R6, electric discharge
One end series connection of electric capacity EC6 positive pole and resistance R6, discharge capacity EC6 negative pole ground connection, resistance the R6 other end and triode
One end 101 of buzzer 1 is connected to after Q3 emitter stage connection jointly.Frequency control circuit 4 include NPN type triode Q4 and
Current-limiting resistance R4, Q4 base stage namely control terminal 401 are connected with the frequency control terminal 202 of micro-control unit 2, and Q4 emitter stage connects
Ground, colelctor electrode are then connected by current-limiting resistance R4 with the other end 102 of buzzer 1.
The power supply control end 201 of micro-control unit 2 exports low level, triode Q3 conductings, power supply to discharge capacity EC6 and
Buzzer 1 is powered, and when power supply control end 201 exports high level, power supply disconnects；The frequency control terminal 202 of micro-control unit 2 exports
High level, triode Q4 conductings, the other end 102 of buzzer 1 is grounded, when frequency control terminal 202 exports low level, buzzer 1
The other end 102 disconnect, when triode Q4 is with certain frequency break-make, buzzer 1 is with certain frequency sounding.Power supply control
The low level of the output of end 201 certain time interval T 1, the Output pulse frequency signal F1 of frequency control terminal 202, buzzer 1 is in time T1
The sound that frequency is F1 is sent, changes F1 frequency size in time T1, the sound that buzzer 1 is sent also is changing, you can
Realize that buzzer 1 sends the sound of different tones.When power supply control end 201 exports high level, discharge capacity EC6 discharges to honeybee
Ring device 1 is powered, and because now voltage is ever-reduced, the sound of buzzer 1 is also constantly reducing, and can also now change F1
Frequency size so that buzzer 1 sends the sound of different tones.
With reference to figure 2a to Fig. 2 c, by taking the switching on and shutting down of a mobile phone as an example, by changing power supply control end 201 and FREQUENCY CONTROL
The signal parameter at end 202, can make buzzer 1 send various music, such as Fig. 2 a upper electric music, Fig. 2 b startup music and figure
2c shutdown music.
Understood according to above-mentioned, in the utility model, power supply circuit 3 controls the conduction time of buzzer 1, in conduction time
Interior, frequency control circuit 4 then controls the pronouncing frequency of buzzer 1, and different pronouncing frequencies is the sound of different tones, power supply
The cooperation of circuit and frequency control circuit can make buzzer send the sound of various tones, meet same application scenario to buzzer
1 different demands.
Second embodiment
With reference to figure 3.
The difference of the present embodiment and second embodiment is, in addition to volume control circuit 7 and filter circuit 8, power supply electricity
Road 3 includes an a NPN type triode Q31 and PNP type triode Q32, wherein, triode Q32 base stage and emitter stage it
Between be connected with one and draw high shut-off resistance.
Volume control circuit 7 is connected with power supply circuit 3, and pulse width modulation end 203 and the volume of micro-control unit 2 control
The control terminal 701 of circuit 7 connects.Filter circuit 8 is connected with power supply circuit 3 and connected with volume control circuit 7.
With reference to figure 3.Volume control circuit 7 includes a NPN type triode Q71, a PNP type triode Q72, current limliting electricity
R71 and R72 is hindered, one is wherein connected between triode Q72 base stage and emitter stage and draws high shut-off resistance.Triode Q71's
Base stage is connected with the pulse width modulation end 203 of micro-control unit 2, and grounded emitter, colelctor electrode passes through current-limiting resistance R71 and three
Pole pipe Q72 base stage connection.Triode Q72 emitter stage connects the positive pole of power supply (not shown), and colelctor electrode passes through current limliting electricity
Resistance R72 is connected with filter circuit 8 and power supply circuit 3.The triode Q31 of power supply circuit 3 base stage and the power supply of micro-control unit 2
Control terminal 201 is connected, grounded emitter, and colelctor electrode is connected with triode Q32 base stage；Triode Q32 emitter stage and volume
Control circuit 7 and filter circuit 8 connect, and colelctor electrode is then connected to 101 ends of buzzer 1.Filter circuit 8 is a filter capacitor
EC8, electric capacity EC8 positive pole are connected with volume control circuit 7 and power supply circuit 3, and negative pole is then grounded, and filter circuit 8 gives volume control
Circuit 7 processed filters.
The pulse width modulation end 203 of micro-control unit 2 sends the pwm signal with certain dutycycle, Q71 conductings, Q71
Collector and emitter ground connection, Q72 is also switched on, and power supply is powered to power supply circuit 3, and filter circuit 8 then gives volume control circuit 7
Filtering, dutycycle is bigger, and the voltage of power supply circuit 3 is higher, on the contrary then lower.The power supply control end 201 of micro-control unit 2 exports
High level, triode Q31 and Q32 conducting, so as to be powered to buzzer 1.The pwm signal that pulse width modulation end 203 exports
Dutycycle is bigger, and the voltage that power supply is output to buzzer 1 is higher, and the volume of buzzer is bigger, conversely, then volume is smaller.
By volume control circuit 7, power supply circuit 3 and frequency control circuit 4, buzzer can be made to send the adjustable various tones of volume
The sound of sound and the various tones of volume change.
Understood according to above-mentioned, in the utility model, the output pulse width modulated signal of volume control circuit 7 to power supply electricity
Road 3, i.e. pwm signal, the dutycycle of pwm signal is bigger, and the actual output voltage of power supply circuit 3 and the ratio of ceiling voltage are got over
Greatly, namely buzzer 1 volume it is bigger, conversely, the volume of buzzer 1 is smaller.Pass through volume control circuit 7, the and of power supply circuit 3
Frequency control circuit 4, can send buzzer 1 with volume it is adjustable or change various tones sound.Realize and give great volume
Minor adjustment, volume control circuit 7 and power supply circuit 3 open and the turn-off time will it is synchronous, i.e., power supply circuit 3 open how long when
Between, volume control circuit 7 also simultaneously open how long, the shut-in time is same.
Above content is to combine specific/preferred embodiment further detailed description of the utility model, no
It can assert that specific implementation of the present utility model is confined to these explanations.For the common skill of the utility model art
For art personnel, without departing from the concept of the premise utility, it can also make to the embodiment that these have been described
Some replacements or modification, and these are substituted or variant should all be considered as belonging to the scope of protection of the utility model.
Claims (10)
1. a kind of multiple tone buzzer circuit, it is characterised in that including buzzer, micro-control unit, power supply circuit, FREQUENCY CONTROL
Circuit, auxiliary circuit and the first discharge circuit, the auxiliary circuit are connected with the both ends of the buzzer, the power supply circuit with
One end of the buzzer, the frequency control circuit and the buzzer are accessed after the first discharge circuit series connection jointly
The other end is connected, and the power supply control end of the micro-control unit is connected with the control terminal of the power supply circuit, the microcontroller list
The frequency control terminal of member is connected with the control terminal of the frequency control circuit.
2. buzzer circuit as claimed in claim 1, it is characterised in that also including volume control circuit, the volume control
Circuit is connected with the power supply circuit, the pulse width modulation end of the micro-control unit and the control of the volume control circuit
End connection.
3. buzzer circuit as claimed in claim 2, it is characterised in that also including filter circuit, the filter circuit and institute
State power supply circuit connection and connected with the volume control circuit.
4. buzzer circuit as claimed in claim 2, it is characterised in that the power supply circuit, frequency control circuit and volume
Control circuit includes triode.
5. buzzer circuit as claimed in claim 2, it is characterised in that the volume control circuit includes a NPN type three
Pole pipe and a PNP type triode.
6. buzzer circuit as claimed in claim 2, it is characterised in that the power supply circuit includes a NPN type triode
With a PNP type triode.
7. buzzer circuit as claimed in claim 5, it is characterised in that the NPN type triode of the volume control circuit
Grounded emitter.
8. buzzer circuit as claimed in claim 6, it is characterised in that the transmitting of the NPN type triode of the power supply circuit
Pole is grounded.
9. buzzer circuit as claimed in claim 3, it is characterised in that the filter circuit includes a filter capacitor.
10. the buzzer circuit as described in claim any one of 1-9, it is characterised in that first discharge circuit is put for RC
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655784.0U CN206819728U (en) | 2017-06-07 | 2017-06-07 | A kind of multiple tone buzzer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655784.0U CN206819728U (en) | 2017-06-07 | 2017-06-07 | A kind of multiple tone buzzer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206819728U true CN206819728U (en) | 2017-12-29 |
Family
ID=60759235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720655784.0U Active CN206819728U (en) | 2017-06-07 | 2017-06-07 | A kind of multiple tone buzzer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206819728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141220A (en) * | 2021-11-29 | 2022-03-04 | 深圳市太美亚电子科技有限公司 | Drive circuit of music passive buzzer |
-
2017
- 2017-06-07 CN CN201720655784.0U patent/CN206819728U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141220A (en) * | 2021-11-29 | 2022-03-04 | 深圳市太美亚电子科技有限公司 | Drive circuit of music passive buzzer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205945657U (en) | D class audio power amplifier's switching power supply | |
| CN206542179U (en) | A kind of load overcurrent overvoltage crowbar | |
| CN105007050B (en) | A kind of adjustable audio signal automatic amplitude limiting apparatus of threshold value | |
| CN206819728U (en) | A kind of multiple tone buzzer circuit | |
| CN201204447Y (en) | Power supply with surge current inhibition function | |
| CN104753327B (en) | Switching Power Supply | |
| CN204721319U (en) | The audio signal automatic amplitude limiting apparatus that a kind of threshold value is adjustable | |
| CN207718188U (en) | A kind of ON-OFF control circuit | |
| CN204206534U (en) | A kind of LED drive circuit and electronic equipment | |
| CN103458342A (en) | Circuit eliminating shutdown POP sound of audio power amplifier | |
| CN209358740U (en) | A kind of bluetooth headset reset control circuit | |
| CN204259144U (en) | A kind of circuit eliminating power amplifier impulsive sound | |
| CN208156170U (en) | A kind of initiative alarming circuit of bus power source | |
| CN203774843U (en) | Mobile terminal device battery charging circuit | |
| CN203217292U (en) | State machine-based multifunctional electronic appliance control circuit | |
| CN206314032U (en) | Inductive control circuit and LED power drive control circuit | |
| CN205069083U (en) | Overshoot prevention circuit | |
| CN208509218U (en) | A kind of wireless headset with function of power protection | |
| CN203104756U (en) | Mute circuit during turning on and off | |
| CN202840964U (en) | Intelligent switch power energy efficiency control circuit | |
| CN203912161U (en) | Noise eliminating circuit | |
| CN202496002U (en) | Audio signal outputting and processing circuit and television | |
| CN207737194U (en) | Vehicle-mounted light adjusting controller | |
| CN209329961U (en) | A kind of power control circuit and electronic equipment | |
| CN207518566U (en) | Controllable switch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190918 Address after: 518000 Guangdong city of Shenzhen province Nanshan District five road high tech Industrial Park South Yingtang technology building five floor Patentee after: Shenzhen Yitoa Electronics Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District five road high tech Industrial Park South Yingtang technology building five floor Patentee before: Shenzhen yitoa Intelligent Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |