CN105989828A - Parallel buzzer and chord tone drive circuit - Google Patents
Parallel buzzer and chord tone drive circuit Download PDFInfo
- Publication number
- CN105989828A CN105989828A CN201511016673.7A CN201511016673A CN105989828A CN 105989828 A CN105989828 A CN 105989828A CN 201511016673 A CN201511016673 A CN 201511016673A CN 105989828 A CN105989828 A CN 105989828A
- Authority
- CN
- China
- Prior art keywords
- buzzer
- parallel
- chord tone
- current
- drive 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Abstract
The invention discloses a parallel buzzer and chord tone drive circuit which is characterized by comprising a single-chip microcomputer. A current-limiting resistor R2, a voltage type buzzer BUZZER and a current-limiting resistor R3 are connected in series in turn between the I/O1 port and the I/O2 port of the single-chip microcomputer. The connecting end of the voltage type buzzer BUZZER and the current-limiting resistor R3 is provided with a lead and connected with the positive electrodes of electrolytic capacitors EC1 and EC2. The negative electrodes of the electrolytic capacitors EC1 and EC2 are grounded. The two ends of the voltage type buzzer BUZZER are connected in parallel with bias resistors R1 and R4. The advantages of the parallel buzzer and chord tone drive circuit are that the circuit is simple and the chord tone effect is great, and melodious chord tone is generated by using several simple resistors and capacitor devices so that the scheme is easy to use, software and hardware are quite concise, easy to learn and use and low in cost, and multiple triodes and peripheral devices are reduced on the basis of the conventional buzzer and chord tone circuit.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of parallel buzzer polyphonic ring tone drive circuit.
Background technology
In today that market competition is day by day fierce, the improvement that product is more paid attention to detail and lifting.The monolithic processor controlled household electrical appliance (relatively common is cabinet air-conditioner) of now a lot of uses have melodious polyphonic ring tone when button operation and send, generally have the polyphonic ring tone of different tone when operation machine open/close or other buttons, compare common ticking or operating experience that BI-BI-sound more pleases to people.
Content of the invention
The object of the invention is contemplated to make up the defect of prior art, provides a kind of parallel buzzer polyphonic ring tone drive circuit.
The present invention is achieved by the following technical solutions:
A kind of parallel buzzer polyphonic ring tone drive circuit, it is characterized in that: include single-chip microcomputer, it is sequentially connected in series current limiting resistance R2, voltage-type buzzer BUZZER and current-limiting resistance R3 between the I/O1 mouth and I/O2 mouth of described single-chip microcomputer, at the positive pole that the connection end of voltage-type buzzer BUZZER and current-limiting resistance R3 is provided with lead-in wire and connects electrochemical capacitor EC1 and EC2, the minus earth of electrochemical capacitor EC1 and EC2, is parallel with bias resistance R1 and R4 at the two ends of voltage-type buzzer BUZZER.
The I/O1 mouth of single-chip microcomputer is oscillator signal input, I/O2 mouth is power supply control end, when I/O2 is high level, by current-limiting resistance R3, electrochemical capacitor EC1 is started to charge up, electrochemical capacitor EC1 and EC2 is as the working power of buzzer BUZZER, if I/O1 mouth has the square-wave signal of certain frequency to export, then buzzer BUZZER can send polyphonic ring tone: chord tone is determined by I/O1 mouth, realize the effect of modified tone, then can switch I/O1 within a certain period of time and send the output signal of multiple different frequency to drive buzzer to realize.Sound amplitude is determined by electrochemical capacitor EC1 charging voltage.I/O2 mouth has several working ways when buzzer exports, output high level, low level or high-impedance state can be selected, the driving signal that corresponding I/O1 mouth exports at different conditions, achieve that the crescendo of sound, continue and the change of diminuendo, it is equipped with the different frequency change of I/O1 again, it is achieved polyphonic ring tone effect.
The invention have the advantage that circuit of the present invention is simple, polyphonic ring tone effect is good, only use several simple resistance, capacitor element, produce melodious polyphonic ring tone, scheme is easy to use, and software and hardware is all very terse, is easy to learn and use, low cost, decreases multiple triode and peripheral components on the basis of conventional buzzer polyphonic ring tone circuit.
Brief description
Fig. 1 is the circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by embodiment, the present invention is described in further detail:
A kind of parallel buzzer polyphonic ring tone drive circuit, it is characterized in that: include single-chip microcomputer, it is sequentially connected in series current limiting resistance R2, voltage-type buzzer BUZZER and current-limiting resistance R3 between the I/O1 mouth and I/O2 mouth of described single-chip microcomputer, at the positive pole that the connection end of voltage-type buzzer BUZZER and current-limiting resistance R3 is provided with lead-in wire and connects electrochemical capacitor EC1 and EC2, the minus earth of electrochemical capacitor EC1 and EC2, is parallel with bias resistance R1 and R4 at the two ends of voltage-type buzzer BUZZER.
Above-described embodiment is only the preferably embodiment of the present invention, and in addition, the present invention can also have other implementations.It should be noted that on the premise of without departing from present inventive concept, any conspicuously improved and modification all should fall under the scope of the present invention.
Claims (1)
1. a parallel buzzer polyphonic ring tone drive circuit, it is characterized in that: include single-chip microcomputer, it is sequentially connected in series current limiting resistance R2, voltage-type buzzer BUZZER and current-limiting resistance R3 between the I/O1 mouth and I/O2 mouth of described single-chip microcomputer, at the positive pole that the connection end of voltage-type buzzer BUZZER and current-limiting resistance R3 is provided with lead-in wire and connects electrochemical capacitor EC1 and EC2, the minus earth of electrochemical capacitor EC1 and EC2, is parallel with bias resistance R1 and R4 at the two ends of voltage-type buzzer BUZZER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016673.7A CN105989828A (en) | 2015-12-29 | 2015-12-29 | Parallel buzzer and chord tone drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016673.7A CN105989828A (en) | 2015-12-29 | 2015-12-29 | Parallel buzzer and chord tone drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105989828A true CN105989828A (en) | 2016-10-05 |
Family
ID=57040529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511016673.7A Pending CN105989828A (en) | 2015-12-29 | 2015-12-29 | Parallel buzzer and chord tone drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105989828A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847247A (en) * | 2016-12-06 | 2017-06-13 | 广州视源电子科技股份有限公司 | Polyphonic ring tone output control method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905326A (en) * | 1996-08-03 | 1999-05-18 | Eaton Corporation | Piezoelectric buzzer control circuit |
| CN101656068A (en) * | 2008-11-13 | 2010-02-24 | 深圳市海洋王照明科技股份有限公司 | Buzzer drive circuit, buzzer and electrical appliance with buzzer |
| CN201417602Y (en) * | 2009-06-19 | 2010-03-03 | 苏州路之遥科技有限公司 | Buzzer drive circuit |
| CN203288237U (en) * | 2013-05-31 | 2013-11-13 | 合肥龙多电子科技有限公司 | Buzzer chord driving circuit |
| CN204480658U (en) * | 2015-01-20 | 2015-07-15 | 北京惠朗时代科技有限公司 | A kind of buzzer drive circuit |
-
2015
- 2015-12-29 CN CN201511016673.7A patent/CN105989828A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905326A (en) * | 1996-08-03 | 1999-05-18 | Eaton Corporation | Piezoelectric buzzer control circuit |
| CN101656068A (en) * | 2008-11-13 | 2010-02-24 | 深圳市海洋王照明科技股份有限公司 | Buzzer drive circuit, buzzer and electrical appliance with buzzer |
| CN201417602Y (en) * | 2009-06-19 | 2010-03-03 | 苏州路之遥科技有限公司 | Buzzer drive circuit |
| CN203288237U (en) * | 2013-05-31 | 2013-11-13 | 合肥龙多电子科技有限公司 | Buzzer chord driving circuit |
| CN204480658U (en) * | 2015-01-20 | 2015-07-15 | 北京惠朗时代科技有限公司 | A kind of buzzer drive circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847247A (en) * | 2016-12-06 | 2017-06-13 | 广州视源电子科技股份有限公司 | Polyphonic ring tone output control method and system |
| CN106847247B (en) * | 2016-12-06 | 2020-08-04 | 广州视源电子科技股份有限公司 | Chord tone output control method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161005 |