Sound effect control device

Abstract

The utility model provides a sound effect control device, which relates to the technical field of sound effect control, and comprises a single chip microcomputer, a sounder, a current amplification circuit and a sound effect control circuit, the single chip microcomputer is connected with the sounder through the current amplification circuit and the sound effect control circuit respectively, the current amplification circuit is electrically connected with the sound effect control circuit, and the sound effect control circuit is electrically connected with the sound effect control circuit. Firstly, the current amplification circuit and the sound effect control circuit are controlled through the single-chip microcomputer, then the current amplification circuit is used for amplifying driving current to the sounder for driving, and the sound effect control circuit is used for driving the sounder to perform single sound effect sounding or / and dazzling sound effect sounding. Furthermore, by means of the connection relation of the single-chip microcomputer, the sounder, the current amplification circuit and the sound effect control circuit, circuit components are reduced, the circuit structure is simple, due to the fact that the circuit structure is simple, the circuit is simple and convenient in various safety regulation and voltage withstanding testing processes, the circuit components are not prone to being damaged, and the manufacturing cost and the manufacturing difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sound effect control, in particular to a sound effect control device. Background Art

[0002] As an important sound prompt device, the buzzer is widely used in various household appliances. Whether it is the instant feedback of button operation, the reminder of function completion, or the preview of function startup, the buzzer provides users with an intuitive and convenient interaction experience with its unique audio signal.

[0003] Currently, the sound effect control circuit of the buzzer usually can only generate a buzzer sound with a fixed frequency, which often appears monotonous and rigid, lacking the harmony and pleasantness of music. At present, when pursuing a high-quality life experience, users have higher requirements for the sound feedback of household appliances, requiring the buzzer to be able to emit music or pleasant ding-dong sounds. To meet this user demand, the buzzer and the dazzling sound drive circuit have emerged. The existing buzzer and dazzling sound drive circuit can simulate more complex and diverse sound effects, bringing a richer auditory experience to users. However, due to the large number of circuit components, the circuit connection becomes complex. Moreover, during the testing and manufacturing process of the buzzer and the dazzling sound drive circuit, in order to ensure circuit safety, various safety regulations and withstand voltage tests need to be carried out. However, due to the circuit complexity, these tests may damage some components in the circuit, thus increasing the manufacturing cost and manufacturing difficulty. Summary of the Utility Model

[0004] To solve the problems of complex circuit structure, high manufacturing cost, and large manufacturing difficulty existing in the above-mentioned prior art, the utility model proposes a sound effect control device, which not only has a simple circuit structure, but also has a low manufacturing cost and manufacturing difficulty.

[0005] To achieve the above technical effects, the technical solution of the utility model is as follows:

[0006] A sound effect control device includes a single-chip microcomputer and a sound generator, and further includes a current amplification circuit and a sound effect control circuit. The single-chip microcomputer is respectively connected to the sound generator through the current amplification circuit and the sound effect control circuit, and the current amplification circuit is connected to the sound effect control circuit.

[0007] Here, first, a single-chip microcomputer controls the current amplification circuit and the sound effect control circuit. Then, the current amplification circuit is used to amplify and drive the current to the sound generator for driving, and the sound effect control circuit is used to drive the sound generator to produce a single sound effect or a chord sound effect. Further, through the connection relationship of the single-chip microcomputer, the sound generator, the current amplification circuit, and the sound effect control circuit, the number of circuit components is reduced, and the circuit structure becomes simple. Due to the simple circuit structure, the circuit is simple and convenient during various safety regulations and withstand voltage tests, and it is not easy to damage the circuit components, reducing the manufacturing cost and manufacturing difficulty.

[0008] Preferably, the single-chip microcomputer is provided with a first input / output port and a second input / output port. The first input / output port of the single-chip microcomputer is connected to the input end of the current amplification circuit, and the second input / output port of the single-chip microcomputer is connected to the input end of the sound effect control circuit. The single-chip microcomputer is convenient for transmitting control signals to the current amplification circuit through the first input / output port, and the single-chip microcomputer is convenient for transmitting control signals to the sound effect control circuit through the second input / output port.

[0009] Preferably, the single-chip microcomputer is further provided with a VCC pin and a GND pin. The VCC pin of the single-chip microcomputer is connected to an external power supply, and the GND pin of the single-chip microcomputer is grounded, which is convenient for providing power to the single-chip microcomputer.

[0010] Preferably, the current amplification circuit includes a first input end, a current-limiting resistor U1, and a semiconductor triode Q1. The first input / output port of the single-chip microcomputer is connected to the first input end. The first input end is connected to one end of the current-limiting resistor U1. The other end of the current-limiting resistor U1 is connected to the base of the semiconductor triode Q1. The collector of the semiconductor triode Q1 is respectively connected to the first pin of the sound generator and the sound effect control circuit. The emitter of the semiconductor triode Q1 is grounded.

[0011] Here, the first input end receives the control signal output from the first input / output port of the single-chip microcomputer. The control signal passes through the current-limiting resistor U1 and reaches the semiconductor triode Q1 to amplify and drive the current to the sound generator for driving.

[0012] Preferably, the semiconductor triode Q1 is an NPN triode, and the NPN triode plays the role of amplifying and driving the current and the role of a switch.

[0013] Preferably, the resistance value of the current-limiting resistor U1 is 1 - 2 kΩ, which plays a role in limiting the current of the control signal output from the first input / output port of the single-chip microcomputer.

[0014] Preferably, the sound effect control circuit includes a second input terminal, a voltage dividing resistor R1, a pull-down resistor R2, and an electrolytic capacitor C1. The second input / output port of the single-chip microcomputer is connected to the second input terminal. The second input terminal is respectively connected to the second pin of the sound generator, one end of the voltage dividing resistor R1, and one end of the pull-down resistor R2. The other end of the voltage dividing resistor R1 is respectively connected to the first pin of the sound generator and the collector of the semiconductor triode Q1. The other end of the pull-down resistor R2 is connected to one end of the electrolytic capacitor C1. The other end of the electrolytic capacitor C1 and the emitter of the semiconductor triode Q1 are grounded together.

[0015] Here, the second input terminal receives the voltage signal output from the second input / output port of the single-chip microcomputer. The output voltage signal is divided by the voltage dividing resistor R1. The voltage of the pull-down resistor R2 is stored on the electrolytic capacitor C1. By controlling the time of the output voltage signal through the second input terminal, charge and discharge will be formed on the electrolytic capacitor C1. The charge and discharge of the electrolytic capacitor C1 will release different frequencies on the sound generator, and different frequencies generate chord sounds. At this time, the sound effect control circuit is used for multi-audio control. The voltage signal output from the second input terminal generates voltage current through the voltage dividing resistor R1, making Q1 conduct, and enabling the control signal output from the first input terminal to conduct and connect to the sound generator to drive the sound generator to generate sound.

[0016] Preferably, the resistance value of the voltage dividing resistor R1 is larger than that of the pull-down resistor R2; this is convenient for the voltage dividing resistor R1 to play a voltage dividing role.

[0017] Preferably, the resistance value of the voltage dividing resistor R1 is 1 - 2 kΩ, the resistance value of the pull-down resistor R2 is 100 - 200 Ω, and the capacitance of the electrolytic capacitor C1 is 100 - 200 uF.

[0018] Preferably, the type of the sound generator is a tablet type buzzer.

[0019] Compared with the prior art, the beneficial effects of the technical solution of the present utility model are:

[0020] The utility model provides a sound effect control device, which includes a single-chip microcomputer, a sound generator, a current amplification circuit and a sound effect control circuit. The single-chip microcomputer is respectively connected to the sound generator through the current amplification circuit and the sound effect control circuit. The current amplification circuit is electrically connected to the sound effect control circuit. First, the single-chip microcomputer controls the current amplification circuit and the sound effect control circuit. Then, the current amplification circuit is used to amplify and drive the current to the sound generator for driving, and the sound effect control circuit is used to drive the sound generator to produce a single sound effect or a chord sound effect. Further, due to the connection relationship among the single-chip microcomputer, the sound generator, the current amplification circuit and the sound effect control circuit, the number of circuit components is reduced and the circuit structure becomes simple. Since the circuit structure is simple, the circuit is simple and convenient in various safety regulations and withstand voltage tests, and it is not easy to damage the circuit components, reducing the manufacturing cost and manufacturing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Fig. shows a structural diagram of a sound effect control device proposed in an embodiment of the utility model;

[0022] Figure 2 Fig. shows another structural diagram of a sound effect control device proposed in an embodiment of the utility model;

[0023] Figure 3 Fig. shows a circuit schematic diagram of a sound effect control device proposed in an embodiment of the utility model.

[0024] 1. Single-chip microcomputer; 2. Sound generator; 3. Current amplification circuit; 4. Sound effect control circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The drawings are only for illustrative purposes and should not be construed as a limitation to this application;

[0026] For better illustration of this embodiment, some parts of the drawings are omitted, enlarged or reduced, which do not represent the actual size. The description of directions such as "upper" and "lower" is not a limitation to this application;

[0027] For those skilled in the art, it is understandable that some well-known content descriptions in the drawings may be omitted;

[0028] The terms used to describe the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to this application;

[0029] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0030] Embodiment 1

[0031] As Figure 1As shown in the figure, this embodiment proposes a sound effect control device, which includes a single-chip microcomputer 1 and a sound generator 2, and also includes a current amplification circuit 3 and a sound effect control circuit 4. The single-chip microcomputer 1 is respectively connected to the sound generator 2 through the current amplification circuit 3 and the sound effect control circuit 4, and the current amplification circuit 3 is connected to the sound effect control circuit 4.

[0032] See Figure 2 , in which the single-chip microcomputer 1 is provided with a first input / output port and a second input / output port. The first input / output port of the single-chip microcomputer 1 is connected to the input end of the current amplification circuit 3, and the second input / output port of the single-chip microcomputer 1 is connected to the input end of the sound effect control circuit 4; the first input / output port is the IO1 pin, and the second input / output port is the IO2 pin; it is convenient for the single-chip microcomputer to transmit control signals to the current amplification circuit through the first input / output port, and it is convenient for the single-chip microcomputer to transmit control signals to the sound effect control circuit through the second input / output port.

[0033] The single-chip microcomputer 1 is also provided with a VCC pin and a GND pin. The VCC pin of the single-chip microcomputer 1 is connected to an external power supply, and the GND pin of the single-chip microcomputer 1 is grounded, which is convenient for providing power to the single-chip microcomputer 1. The type of the sound generator 2 is a piezoelectric buzzer, and the sounding frequency is 4 kHz. The piezoelectric buzzer has the advantages of long service life, high reliability, clear and diverse sounds, miniaturization and high volume, and is convenient for installation and maintenance.

[0034] In this embodiment, first, the single-chip microcomputer controls the current amplification circuit and the sound effect control circuit, which expands the compatibility and expandability in the design. Then, the current amplification circuit is used to amplify and drive the current to the sound generator for driving, and the sound effect control circuit is used to drive the sound generator to produce a single sound effect or a chord sound effect; further, through the connection relationship of the single-chip microcomputer, the sound generator, the current amplification circuit and the sound effect control circuit, the number of circuit components is reduced, and the circuit structure becomes simple. Because the circuit structure is simple, the circuit is simple and convenient in various safety regulations and withstand voltage tests, and it is not easy to damage the circuit components, reducing the manufacturing cost and manufacturing difficulty. It should be particularly stated that a sound effect control device proposed in this embodiment can be compatible with single sound effect sound control or can be used as chord sound effect sound control. At the same time, the circuit structure of the sound effect control device is simple, the manufacturing cost is low, the fewer the devices on the circuit, the better its reliability, reducing the development cycle, extending the circuit usage, and shortening the development cycle.

[0035] Embodiment 2

[0036] See Figure 3, the current amplification circuit 3 includes a first input terminal BUZ, a current-limiting resistor U1, and a semiconductor triode Q1. The first input / output port of the single-chip microcomputer 1 is connected to the first input terminal BUZ. The first input terminal BUZ is connected to one end of the current-limiting resistor U1. The other end of the current-limiting resistor U1 is connected to the base of the semiconductor triode Q1. The collector of the semiconductor triode Q1 is respectively connected to the first pin of the sound generator 2 and the sound effect control circuit 4. The emitter of the semiconductor triode Q1 is grounded.

[0037] Among them, the first input / output port is the IO1 pin of the single-chip microcomputer. The first input terminal BUZ receives the control signal output from the IO1 pin of the single-chip microcomputer. The control signal output from the IO1 pin of the single-chip microcomputer is a PWM wave signal. The PWM wave signal is a digital signal composed of high level and low level, and the time ratio of its high level and low level can be adjusted to realize the control of the analog signal. The control signal passes through the current-limiting resistor U1 and reaches the semiconductor triode Q1 to amplify and drive the current to the sound generator for driving. The semiconductor triode Q1 is an NPN triode, and the NPN triode plays the role of amplifying and driving the current and the role of a switch. The resistance value of the current-limiting resistor U1 is 1 kΩ, and the current-limiting resistor U1 plays a role in limiting the current of the control signal output from the IO1 pin of the single-chip microcomputer.

[0038] Embodiment 3

[0039] See Figure 3 , the sound effect control circuit 4 includes a second input terminal BUZ1, a voltage-dividing resistor R1, a pull-down resistor R2, and an electrolytic capacitor C1. The second input / output port of the single-chip microcomputer 1 is connected to the second input terminal BUZ1. The second input terminal BUZ1 is respectively connected to the second pin of the sound generator 2, one end of the voltage-dividing resistor R1, and one end of the pull-down resistor R2. The other end of the voltage-dividing resistor R1 is respectively connected to the first pin of the sound generator 2 and the collector of the semiconductor triode Q1. The other end of the pull-down resistor R2 is connected to one end of the electrolytic capacitor C1. The other end of the electrolytic capacitor C1 and the emitter of the semiconductor triode Q1 are grounded together.

[0040] Among them, the second input terminal BUZ1 receives a 5V voltage signal output from the second input / output port of the single-chip microcomputer. If the second input terminal BUZ1 always maintains the output of the 5V voltage signal, the sound generator 2 can emit a single sound effect. If the second input terminal BUZ1 does not maintain the output of the 5V voltage signal, that is, the output time of the 5V voltage signal controlled by the second input terminal BUZ1 changes, the voltage signal output will also stop and start, and the voltage signal becomes a signal with a variable amount. Since the voltage-dividing resistor R1 and the pull-down resistor R2 are in parallel, the 5V voltage signal output from the second input terminal is divided by the voltage-dividing resistor R1, and the voltage of the pull-down resistor R2 is stored on the electrolytic capacitor C1. By controlling the output voltage signal time through the second input terminal BUZ1, charge and discharge will be formed on the electrolytic capacitor C1. The charge and discharge of the electrolytic capacitor C1 will release different frequencies on the sound generator, and different frequencies will generate a chord sound. At this time, the sound effect control circuit is used for multi-audio control; the voltage signal output from the second input terminal BUZ1 generates a voltage current through the voltage-dividing resistor R1, which makes Q1 conduct, and makes the control signal output from the first input terminal BUZ conduct and connect to the sound generator to drive the sound generator.

[0041] The resistance value of the voltage-dividing resistor R1 is larger than that of the pull-down resistor R2, which is convenient for the voltage-dividing resistor R1 to play a voltage-dividing role; the resistance value of the voltage-dividing resistor R1 is 2kΩ, the resistance value of the pull-down resistor R2 is 100Ω, and the capacitance of the electrolytic capacitor C1 is 100uF; the size values of the voltage-dividing resistor R1, the pull-down resistor R2, and the electrolytic capacitor C1 are not limited to the above specific values. In the actual application process, specific values within the range can also be taken. For example, the resistance value of the voltage-dividing resistor R1 is 1kΩ, the resistance value of the pull-down resistor R2 is 200Ω, and the capacitance of the electrolytic capacitor C1 is 200uF.

[0042] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An audio effect control device, comprising a single-chip microcomputer (1) and a sound generator (2), characterized in that: It also includes a current amplification circuit (3) and a sound effect control circuit (4). The single-chip microcomputer (1) is connected to the sound generator (2) through the current amplification circuit (3) and the sound effect control circuit (4) respectively, and the current amplification circuit (3) is connected to the sound effect control circuit (4).

2. The sound effect control device according to claim 1, wherein The single-chip microcomputer (1) is provided with a first input / output port and a second input / output port. The first input / output port of the single-chip microcomputer (1) is connected to the input end of the current amplification circuit (3), and the second input / output port of the single-chip microcomputer (1) is connected to the input end of the sound effect control circuit (4).

3. The sound effect control device according to claim 1, characterized in that, The single-chip microcomputer (1) is also provided with a VCC pin and a GND pin. The VCC pin of the single-chip microcomputer (1) is connected to an external power supply, and the GND pin of the single-chip microcomputer (1) is grounded.

4. The sound effect control device according to claim 2, wherein The current amplification circuit (3) includes a first input end, a current-limiting resistor U1 and a semiconductor triode Q1. The first input / output port of the single-chip microcomputer (1) is connected to the first input end, the first input end is connected to one end of the current-limiting resistor U1, the other end of the current-limiting resistor U1 is connected to the base of the semiconductor triode Q1, the collector of the semiconductor triode Q1 is respectively connected to the first pin of the sound generator (2) and the sound effect control circuit (4), and the emitter of the semiconductor triode Q1 is grounded.

5. The sound effect control device according to claim 4, characterized in that, The semiconductor triode Q1 is an NPN triode.

6. The sound effect control device according to claim 4, characterized in that The resistance value of the current-limiting resistor U1 is 1 - 2 kΩ.

7. The sound effect control device according to claim 4, wherein The sound effect control circuit (4) includes a second input end, a voltage-dividing resistor R1, a pull-down resistor R2 and an electrolytic capacitor C1. The second input / output port of the single-chip microcomputer (1) is connected to the second input end, the second input end is respectively connected to the second pin of the sound generator (2), one end of the voltage-dividing resistor R1 and one end of the pull-down resistor R2, the other end of the voltage-dividing resistor R1 is respectively connected to the first pin of the sound generator (2) and the collector of the semiconductor triode Q1, the other end of the pull-down resistor R2 is connected to one end of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C1 and the emitter of the semiconductor triode Q1 are commonly grounded.

8. The sound effect control device according to claim 7, wherein The resistance value of the voltage-dividing resistor R1 is larger than that of the pull-down resistor R2.

9. The sound effect control device according to claim 7, wherein The resistance value of the voltage-dividing resistor R1 is 1 - 2 kΩ, the resistance value of the pull-down resistor R2 is 100 - 200 Ω, and the capacitance of the electrolytic capacitor C1 is 100 - 200 uF.

10. The sound effect control device according to any one of claims 1-9, characterized in that, The type of the sound generator (2) is a tablet type buzzer.

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