CN205168321U - On -vehicle with dazzle sound circuit - Google Patents
On -vehicle with dazzle sound circuit Download PDFInfo
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- CN205168321U CN205168321U CN201521000610.8U CN201521000610U CN205168321U CN 205168321 U CN205168321 U CN 205168321U CN 201521000610 U CN201521000610 U CN 201521000610U CN 205168321 U CN205168321 U CN 205168321U
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Abstract
The utility model discloses an on -vehicle with dazzle sound circuit, including the control unit, power supply output circuit, sound -producing circuit, volume drive circuit and tone drive circuit. The utility model discloses on -vehicle with dazzle sound circuit has audio advantage such as good, with low costs.
Description
Technical field
The utility model relates to vehicle electronics technical field, is specifically a kind of vehicle-mounted and dazzle sound circuit.
Background technology
Auto trade development, vehicle electronics also makes rapid progress, and also gets more and more to the requirement of vehicle electronics, requires low cost again, high safety simultaneously.Hommization for audible alarm is also more and more higher, and meanwhile, cost is low again.
At present, following three kinds of design plans are mainly contained for audible alarm circuit:
Scheme one: adopt first stage amplifier, by first stage amplifier amplifying signal rear drive loud speaker or buzzer warning.
Advantage: cost is very low.Lack and account for: sound is relatively dull.
Scheme two: adopt speech chip, drives loud speaker or buzzer warning by speech chip.
Advantage: audio alert and music alarm can be realized.Shortcoming: cost is high.
Scheme three: adopt two roads to drive, the wherein pitch frequency of a road input control sounding, another road input control working power, powers during work, during PTO Power Take Off, the electric charge in charge-discharge circuit, when meeting time delay is closed, can produce the coda that a volume is descending.
Advantage: cost is low.Shortcoming: the descending coda of a volume can only be produced when closing electricity, other audio can not be produced, also cannot cancel.
In order to solve the problem, this case is life therefrom.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of audio is good, that cost is low is vehicle-mounted and dazzle sound circuit.
To achieve these goals, the technical solution of the utility model is as follows: one is vehicle-mounted and dazzle sound circuit, comprises control unit, power output circuit, phonation circuit, volume driving circuit and tone driving circuit; Power output circuit comprises power supply, the first diode and the first resistance; Phonation circuit comprises microphone device and the second diode; Volume driving circuit comprises the first aerotron, the second resistance, the 3rd resistance and the first electric capacity; Tone driving circuit comprises the second aerotron, the 4th resistance, the 5th resistance and the second electric capacity; Power supply is connected with the anode of the first diode, and the cathode of the first diode is connected with one end of the first resistance, and the other end of the first resistance is connected with the positive pole of microphone device; The anode of the second diode, cathode are connected with the negative pole of microphone device, positive pole respectively; Control unit is connected with one end of the second resistance, and the other end of the second resistance is connected with the first transistor base, and the collecting electrode of the first aerotron is connected with the anode of the second diode; 3rd resistance and the first electric capacity are connected in parallel between the first transistor base and ground wire respectively; Control unit is connected with one end of the 4th resistance, and the other end of the 42 resistance is connected with the second transistor base; The collecting electrode of the second aerotron is connected with the emitting stage of the first aerotron, the emitting stage ground connection of the second aerotron; 5th resistance and the second electric capacity are connected in parallel between the second transistor base and ground wire respectively.
As preferably, described microphone device is buzzer phone or loud speaker.
Adopt after technique scheme, the utility model compared with prior art, has the following advantages: the utility model is vehicle-mounted and dazzle sound circuit and can produce multiple musical sound and audio, realizes polyphonic ring tone, has the advantages such as audio is good, with low cost.
Accompanying drawing explanation
Fig. 1 is the vehicle-mounted circuit structure diagram with dazzling sound circuit of the utility model.
Shown in figure: 1, power output circuit P, power supply D1, the first diode R1, the first resistance 2, phonation circuit B, microphone device D2, the second diode 3, volume driving circuit Q1, the first aerotron R2, the second resistance R3, the 3rd resistance C1, the first electric capacity 4, tone driving circuit Q2, the second aerotron R4, the 4th resistance R5, the 5th resistance C2, the second electric capacity 5, control unit.
Detailed description of the invention
Below by drawings and Examples, the utility model is further elaborated.
As shown in Figure 1: one is vehicle-mounted and dazzle sound circuit, comprises control unit 5, power output circuit 1, phonation circuit 2, volume driving circuit 3 and tone driving circuit 4.
Power output circuit 1 comprises power supply P, the first diode D1 and the first resistance R1.Phonation circuit 2 comprises microphone device B and the second diode D2.Volume driving circuit 3 comprises the first aerotron Q1, the second resistance R2, the 3rd resistance R3 and the first electric capacity C1.Tone driving circuit 4 comprises the second aerotron Q2, the 4th resistance R4, the 5th resistance R5 and the second electric capacity C2.
Power supply P is connected with the anode of the first diode D1, and the cathode of the first diode D1 is connected with one end of the first resistance R1, and the other end of the first resistance R1 is connected with the positive pole of microphone device B; The anode of the second diode D2, cathode are connected with the negative pole of microphone device B, positive pole respectively; Control unit 5 is connected with one end of the second resistance R2, and the other end of the second resistance R2 is connected with the first aerotron Q1 base stage, and the collecting electrode of the first aerotron Q1 is connected with the anode of the second diode D2; 3rd resistance R3 and the first electric capacity C1 is connected in parallel between the first aerotron Q1 base stage and ground wire respectively; Control unit 5 is connected with one end of the 4th resistance R4, and the other end of the 4th resistance R4 is connected with the second aerotron Q2 base stage; The collecting electrode of the second aerotron Q2 is connected with the emitting stage of the first aerotron Q1, the emitting stage ground connection of the second aerotron Q2; 5th resistance R5 and the second electric capacity C2 is connected in parallel between the second aerotron Q2 base stage and ground wire respectively.
In the present embodiment, control unit 5 adopts model to be the micro controller system of AT89C51.The micro controller system of this model can export high-frequency PWM (dutycycle) signal and pitch frequency.
In the present embodiment, microphone device B is loud speaker.Certainly, the utility model does not do concrete restriction to the kind of microphone device B, and in other embodiment, microphone device B also can be buzzer phone etc.
Principle of work:
Power output circuit 1: power supply P output voltage signal, by providing protection and operating voltage to loud speaker after the first diode D1 and the first resistance R1.Wherein the first diode D1 plays anti-reverse protective effect, and the first resistance R1 plays current limiting pressure-limiting protective effect.
Volume control circuit: control unit 5 exports high-frequency PWM signal, by being input in the first aerotron Q1, eventually through the volume of the first aerotron Q1 control loudspeaker after the second resistance R2 current limliting step-down and RC filter circuit (being made up of the 3rd resistance R3 and the first electric capacity C1) filtering.In this process, can the different voltage of enable generation, superposed by control circuit, thus reach control amplitude, finally reach the object of control loudspeaker volume.
Tone control circuit: control unit 5 exports the pitch frequency of sound, by being input in the second aerotron Q2 after the 4th resistance R4 current limliting step-down and RC filter circuit (being made up of the 5th resistance R5 and the second electric capacity C2) filtering, loud speaker is driven to send the sound of various frequency eventually through the second aerotron Q2.
The utility model is vehicle-mounted and dazzle sound circuit and can produce multiple musical sound and audio, realizes polyphonic ring tone, has the advantages such as audio is good, with low cost.
Upper described foundation embodiment is enlightenment, and by above-mentioned description, relevant staff in the scope not departing from this utility model thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification sheets, must determine its scope protected according to right.
Claims (2)
1. vehicle-mounted and dazzle a sound circuit, it is characterized in that: comprise control unit, power output circuit, phonation circuit, volume driving circuit and tone driving circuit; Power output circuit comprises power supply, the first diode and the first resistance; Phonation circuit comprises microphone device and the second diode; Volume driving circuit comprises the first aerotron, the second resistance, the 3rd resistance and the first electric capacity; Tone driving circuit comprises the second aerotron, the 4th resistance, the 5th resistance and the second electric capacity; Power supply is connected with the anode of the first diode, and the cathode of the first diode is connected with one end of the first resistance, and the other end of the first resistance is connected with the positive pole of microphone device; The anode of the second diode, cathode are connected with the negative pole of microphone device, positive pole respectively; Control unit is connected with one end of the second resistance, and the other end of the second resistance is connected with the first transistor base, and the collecting electrode of the first aerotron is connected with the anode of the second diode; 3rd resistance and the first electric capacity are connected in parallel between the first transistor base and ground wire respectively; Control unit is connected with one end of the 4th resistance, and the other end of the 4th resistance is connected with the second transistor base; The collecting electrode of the second aerotron is connected with the emitting stage of the first aerotron, the emitting stage ground connection of the second aerotron; 5th resistance and the second electric capacity are connected in parallel between the second transistor base and ground wire respectively.
2. one according to claim 1 is vehicle-mounted and dazzle sound circuit, it is characterized in that: described microphone device is buzzer phone or loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521000610.8U CN205168321U (en) | 2015-12-07 | 2015-12-07 | On -vehicle with dazzle sound circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521000610.8U CN205168321U (en) | 2015-12-07 | 2015-12-07 | On -vehicle with dazzle sound circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205168321U true CN205168321U (en) | 2016-04-20 |
Family
ID=55732341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521000610.8U Expired - Fee Related CN205168321U (en) | 2015-12-07 | 2015-12-07 | On -vehicle with dazzle sound circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205168321U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933825A (en) * | 2016-05-20 | 2016-09-07 | 浙江鑫网电子科技有限公司 | Double frequency circuit used for loudspeaker |
| CN109461294A (en) * | 2018-12-29 | 2019-03-12 | 上海正灏电子仪器有限公司 | A kind of medical instrument warning device and application method based on audible alert signal |
-
2015
- 2015-12-07 CN CN201521000610.8U patent/CN205168321U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933825A (en) * | 2016-05-20 | 2016-09-07 | 浙江鑫网电子科技有限公司 | Double frequency circuit used for loudspeaker |
| CN105933825B (en) * | 2016-05-20 | 2018-11-09 | 黄亮 | A kind of loud speaker double frequency circuit |
| CN109461294A (en) * | 2018-12-29 | 2019-03-12 | 上海正灏电子仪器有限公司 | A kind of medical instrument warning device and application method based on audible alert signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20211207 |