CN220731163U

CN220731163U - Circuit suitable for electronic harmonica

Info

Publication number: CN220731163U
Application number: CN202321730104.9U
Authority: CN
Inventors: 王中秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2024-04-05
Anticipated expiration: 2033-07-04

Abstract

A circuit suitable for an electronic harmonica relates to the field of electronic harmonica. The sound output end of the gas pressure sensor is connected with the sound input end of the control module; the semitone signal output end of the semitone button is connected with the semitone signal input end of the controller; the storage signal output end of the storage module is connected with the storage signal input end of the control module; the stereo signal output end of the control module is connected with the stereo signal input end of the stereo codec; the audio signal output end of the stereo codec is connected with the audio signal input end of the audio power amplifier circuit; the audio output signal output end of the stereo codec is simultaneously connected with the audio output connector socket and the audio output signal input end of the audio output connector socket. The multi-tone, wide-range, variable tone and rich tone requirements of the current user on the modern electronic harmonica are met, and the problems of less tone, insufficient reduction degree of tone, complex circuit structure and high cost of the current electronic harmonica are solved.

Description

Circuit suitable for electronic harmonica

Technical Field

The utility model relates to the field of electronic harmonica.

Background

With the continuous progress of power electronics, energy conservation and control technologies, harmonica has also evolved into electronic harmonica. The electronic harmonica is flexible and convenient to blow and portable, and is a pocket musical instrument which is popular with the masses. The structure principle of the device mainly utilizes the blowing and sucking free reeds to generate mechanical vibration sounding, and has the defects of monotonous tone, fixed tone, narrower range and capability of amplifying sound volume only through simple speaking.

The current electronic harmonica has the defects of less tone, unrealistic tone reduction degree (the current electronic musical instrument has sound storage of tone by using a sound source chip, the memory of the sound source chip is less and the sound of the musical instrument cannot be well stored), complex circuit structure and high cost (the current electronic harmonica generally uses one sound source chip and has high cost), and the current electronic harmonica generally adopts an RC oscillating circuit for electronic oscillation sounding, so that the current electronic harmonica is simpler, and along with the increasing demands of users, the requirements of the users on the electronic harmonica are higher and higher, and the users hope that the modern electronic harmonica has the functions of multiple tone colors, wide tone range, variable tone and rich tone.

Disclosure of Invention

The utility model provides a circuit suitable for an electronic harmonica, which aims to meet the requirements of current users on multiple timbres, wide gamut, variable tone and rich timbres of modern electronic harmonica and also aims to solve the problems of less timbres, insufficient reduction degree of timbres, complex circuit structure and high cost of the current electronic harmonica.

The technical scheme adopted by the utility model is as follows:

the circuit suitable for the electronic harmonica comprises an audio power amplifier circuit (1), a gas pressure sensor (2), a stereo codec (3), a control module (4), a storage module (5), a semitone button (6), a power management module (7), an audio output connector socket (8) and an audio output connector (9);

the sound output end of the gas pressure sensor (2) is connected with the sound input end of the control module (4); the power signal output end of the power management module (7) is connected with the power signal input end of the control module (4); the semitone signal output end of the semitone button (6) is connected with the semitone signal input end of the control module (4); the storage signal output end of the storage module (5) is connected with the storage signal input end of the control module (4); the stereo signal output end of the control module (4) is connected with the stereo signal input end of the stereo codec (3); the audio signal output end of the stereo codec (3) is connected with the audio signal input end of the audio power amplifier circuit (1); the audio output signal output end of the stereo codec (3) is connected with the audio output signal input end of the audio output connector socket (8); the audio output signal output end of the stereo codec (3) is also connected with the audio output signal input end of the audio output connector socket (8).

Preferably, the audio power amplifier circuit (1) comprises capacitors C15, C16, C28, C31, TC8002D chips, a resistor R1, a resistor R30 and a pin J9; the pin 1 of the TC8002D chip is connected with the pin 7 of the audio output connector (9); the method comprises the steps of carrying out a first treatment on the surface of the Pins 2 and 3 of the TC8002D chip are simultaneously connected with one end of a capacitor C15, and the other end of the capacitor C15 is grounded; the pin 4 of the TC8002D chip is connected with one end of a capacitor C16 and one end of a resistor R30 at the same time, the other end of the capacitor C16 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R29 in the stereo codec (3); the other end of the resistor R30 is simultaneously connected with a No. 5 pin of the TC8002D chip and a No. 2 pin of the pin J9; pin 1 of pin J9 is connected with pin 8 of TC8002D chip; the pin 7 of the TC8002D chip is connected with one end of the capacitor C28 and one end of the capacitor C31 at the same time; the other end of the capacitor C28 and the other end of the capacitor C31 are simultaneously connected with a No. 6 pin of the TC8002D chip;

the 51 # pin of the control module (4) is connected with the 7 # pin of the stereo codec (3); the 52 # pin of the control module (4) is connected with the 8 # pin of the stereo codec (3); the No. 53 pin of the control module (4) is connected with one end of a resistor R39 in the power management module (7); the 54 # pin of the control module (4) is connected with the 10 # pin of the stereo codec (3); the No. 63 pin of the control module (4) is connected with the No. 11 pin of the stereo codec (3); the 92 # pin of the control module (4) is connected with the 16 # pin of the stereo codec (3); the pin 93 of the control module (4) is connected with the pin 17 of the stereo codec (3);

the No. 29 pin of the stereo codec (3) is connected with one end of a capacitor C12, the other end of the capacitor C12 is connected with one end of a resistor R27, and the other end of the resistor R27 is connected with the No. 3 pin of the audio output connector (9);

the 30 # pin of the stereo codec (3) is connected with one end of a capacitor C14, the other end of the capacitor C14 is connected with one end of a resistor R29, and the other end of the resistor R29 is connected with the 2 # pin of the audio output connector (9);

the No. 4 pin of the audio output connector socket (8) is connected with the No. 70 pin of the control module (4); the No. 3 pin of the audio output connector socket (8) is connected with the No. 71 pin of the control module (4);

the No. 7 pin of the storage module (5) is connected with the No. 65 pin of the control module (4); the No. 8 pin of the storage module (5) is connected with the No. 66 pin of the control module (4); the No. 1 pin of the storage module (5) is connected with the No. 78 pin of the control module (4); the No. 2 pin of the storage module (5) is connected with the No. 79 pin of the control module (4); the No. 5 pin of the storage module (5) is connected with the No. 80 pin of the control module (4); the No. 3 pin of the storage module (5) is connected with the No. 83 pin of the control module (4);

the No. 1 pin of the semitone button (6) is connected with the No. 82 pin of the control module (4);

the power management module (7) comprises an ME6206 chip, a capacitor C29, a capacitor C30, a capacitor C52, a resistor R45, a resistor R39, a resistor R40, a resistor R44, a resistor R46, a resistor R32, a resistor R31, a pin J3, a diode D1, a triode Q1, a key S1, a field effect transistor KT1, a capacitor C48, a capacitor C47, a capacitor C45, a capacitor C44, a capacitor C46, an inductor L1, a fuse F1 and an IP6306 chip;

the pin 1 of the IP6306 chip is connected with one end of the capacitor C45; the other end of the capacitor C45 is grounded; the pin 6 of the IP6306 chip is connected with one end of the resistor R36 and one end of the capacitor C46 at the same time; the other end of the capacitor C36 is connected with one end of the inductor L1 and one end of the fuse F1 at the same time; the other end of the fuse F1 is connected with the cathode of the diode D1, and the anode of the diode D1 is simultaneously connected with one end of the resistor R31 and the pin 1 of the pin J3; the other end of the resistor R31 is connected with one end of the resistor R32; the other end of the resistor R32 is grounded; the pin 8 of the IP6306 chip is connected with one end of the capacitor C47 and one end of the capacitor C48 simultaneously, and the other end of the capacitor C47 and the other end of the capacitor C48 are grounded simultaneously;

one end of the capacitor C48 is simultaneously connected with one end of the key S1, one end of the resistor R46 and the No. 2 pin of the field effect tube KT 1; the other end of the key S1 is connected with one end of a resistor R39 and one end of a resistor R40 at the same time; the other end of the resistor R39 is connected with a No. 53 pin of the control module (4);

the other end of the resistor R40 is connected with one end of the resistor R45 and the base electrode of the triode Q1 at the same time; the other end of the resistor R45, the emitter of the triode Q1 and one end of the capacitor C52 are grounded at the same time; the other end of the capacitor C52 is connected with one end of the resistor R44 and the collector electrode of the triode Q1 at the same time; the other end of the resistor R44 is connected with the other end of the resistor R46 and the No. 1 pin of the field effect transistor KJ1 at the same time; the No. 3 pin of the field effect tube KJ1 is simultaneously connected with one end of the capacitor C29 and the No. 3 pin of the ME6206 chip; the No. 2 pin and the No. 0 pin of the ME6206 chip are simultaneously connected with a 3.3V power supply and one end of a capacitor C30; the other end of the capacitor C30 is simultaneously connected with the No. 1 pin of the ME6206 chip and the ground, and the other end of the capacitor C29 is grounded;

the No. 23 pin of the control module (4) is connected with the No. 4 pin of the J1 of the gas pressure sensor (2); the No. 24 pin of the control module (4) is connected with the No. 4 pin of the J2 of the gas pressure sensor (2); the pin 25 of the control module (4) is connected with the pin 4 of the J3 of the gas pressure sensor (2); the No. 26 pin of the control module (4) is connected with the No. 4 pin of the J4 of the gas pressure sensor (2); the No. 29 pin of the control module (4) is connected with the No. 4 pin of the J11 of the gas pressure sensor (2); the No. 30 pin of the control module (4) is connected with the No. 4 pin of the J12 of the gas pressure sensor (2); the No. 31 pin of the control module (4) is connected with the No. 4 pin of the J14 of the gas pressure sensor (2); the No. 32 pin of the control module (4) is connected with the No. 4 pin of the J15 of the gas pressure sensor (2); the No. 35 pin of the control module (4) is connected with the No. 4 pin of the J16 of the gas pressure sensor (2); the No. 36 pin of the control module (4) is connected with the No. 4 pin of the J17 of the gas pressure sensor (2); the 33 # pin of the control module (4) is connected with the 4 # pin of the J18 of the gas pressure sensor (2); and a pin 34 of the control module (4) is connected with a pin 4 of the J19 of the gas pressure sensor (2).

Preferably, the circuit further comprises an OLED display circuit (10), and a pin 3 of the OLED display circuit (10) is connected with a pin 63 of the control module (4).

Preferably, the circuit further comprises a USB socket connector (11), and a USB signal output end of the USB socket connector (11) is connected with a USB signal input end of the control module (4).

The beneficial effects are that: as a complete product, the utility model stores more than 100 sampling sounds of original musical instruments by using the TF memory card, and can store at least 500 timbres along with the upgrading of the timbres, thereby solving the defect of less timbres of the electronic harmonica; the utility model uses the high-capacity tf memory card to store the sampled timbre of the real musical instrument, and the fidelity consistency of the sampled timbre and the timbre of the real musical instrument reaches 98 percent, so that each timbre of the electronic harmonica is more like a true musical instrument, and the problem that the reduction degree of the timbre of the current electronic musical instrument is not true enough is solved; the circuit has simple structure and low cost, and effectively reduces the cost and the sales price of the harmonica. The utility model meets the requirements of the current user on multiple tone colors, wide tone range, variable tone and rich tone colors of the modern electronic harmonica, and solves the problems of less tone colors, insufficient reduction degree of tone colors, complex circuit structure and high cost of the current electronic harmonica.

Drawings

FIG. 1 is a schematic diagram of a circuit suitable for use in an electronic harmonica;

fig. 2 is a schematic circuit diagram of 12 gas pressure sensors, and fig. 2 (1) (2) (3) is a schematic circuit diagram of 12 gas pressure sensors;

fig. 3 is a schematic circuit configuration diagram of an audio DAC chip (stereo codec (3));

fig. 4 is a schematic circuit structure of an MCU control chip (control module);

fig. 5 is a schematic circuit configuration diagram of a harmonica-extended large-capacity TF memory card (storage module (5));

FIG. 6 is a schematic circuit diagram of a harmonica semitone button;

FIG. 7 is a schematic diagram of the circuit structure of the power management module (7);

FIG. 8 is a schematic circuit diagram of an audio output connector receptacle;

FIG. 9 is a schematic circuit diagram of an audio output connector;

FIG. 10 is a schematic diagram of a circuit structure of an OLCD display;

FIG. 11 is a schematic diagram of a circuit configuration of an audio power amplifier circuit;

reference numerals: the device comprises a 1 audio power amplifier circuit, a 2 gas pressure sensor, a 3 stereo codec, a 4 control module, a 5 storage module (5), a 6 semitone button, a 7 power module, an 8 audio output connector socket, a 9 audio output connector and a 10OLED display screen.

Detailed Description

A circuit for an electronic harmonica according to the present embodiment includes an audio power amplifier circuit (1), a gas pressure sensor (2), a stereo codec (3), a control module (4), a storage module (5), a half-tone button (6), a power management module (7), an audio output connector socket (8), and an audio output connector (9);

Second embodiment a circuit suitable for an electronic harmonica according to the present embodiment will be described with reference to fig. 1 to 10,

the audio power amplifier circuit (1) comprises capacitors C15, C16, C28, C31, TC8002D chips, a resistor R1, a resistor R30 and a pin J9; the pin 1 of the TC8002D chip is connected with the pin 7 of the audio output connector (9); the method comprises the steps of carrying out a first treatment on the surface of the Pins 2 and 3 of the TC8002D chip are simultaneously connected with one end of a capacitor C15, and the other end of the capacitor C15 is grounded; the pin 4 of the TC8002D chip is connected with one end of a capacitor C16 and one end of a resistor R30 at the same time, the other end of the capacitor C16 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R29 in the stereo codec (3); the other end of the resistor R30 is simultaneously connected with a No. 5 pin of the TC8002D chip and a No. 2 pin of the pin J9; pin 1 of pin J9 is connected with pin 8 of TC8002D chip; the pin 7 of the TC8002D chip is connected with one end of the capacitor C28 and one end of the capacitor C31 at the same time; the other end of the capacitor C28 and the other end of the capacitor C31 are simultaneously connected with a No. 6 pin of the TC8002D chip;

In the first and second embodiments, the gas pressure sensor 2 is used to measure the force of blowing or sucking by the player, so as to determine which note is to be given, and the total number of the notes is 12, which corresponds to the 12 holes of the harmonica. The stereo codec (3), also called audio DAC chip, is responsible for converting digital audio signals of the MCU control module (control module) into analog audio signals. The control module is used for running the procedure of the harmonica and is responsible for coordinating the sounding of the whole harmonica and the calling of tone.

The storage module is used for expanding the high-capacity TF memory card, is used for storing the adopted sound of various tone colors, and is convenient for calling each tone color when using the harmonica. The half-tone button of the harmonica is used for pressing the button to make the harmonica generate half-tone. The audio power amplifier circuit is used for pushing the loudspeaker to sound.

In the third embodiment, the circuit suitable for the electronic harmonica is further described in the second embodiment, and in the present embodiment, the circuit further includes an OLED display circuit (10), where a pin 3 of the OLED display circuit (10) is connected to a pin 63 of the control module (4); and a pin 3 of the OLED display circuit (10) is connected with a pin 67 of the control module (4). And the OLED display screen is used for displaying.

In a fourth embodiment, the circuit applied to the electronic harmonica described in the second embodiment further includes a USB socket connector (11), and a USB signal output end of the USB socket connector (11) is connected to a USB signal input end of the control module (4).

Principle of:

the chip in the control module measures 12 air pressure sensors corresponding to the mouth-piece, so that notes which need to occur at present are obtained, note data in the storage module (TF card) are read, the data are sent into the stereo codec (3) (audio DAC chip), and accordingly sound is obtained and is sent out through the audio power amplifier circuit (1).

The control module can adjust tone, volume, tone and the like, and can read data of the storage module (TF card) and control the stereo codec (3) to make sound.

While the utility model has been described with reference to several particular embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from its scope. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. A circuit suitable for an electronic harmonica, which is characterized by comprising an audio power amplifier circuit (1), a gas pressure sensor (2), a stereo codec (3), a control module (4), a storage module (5), a half-tone button (6), a power management module (7), an audio output connector socket (8) and an audio output connector (9);

2. A circuit suitable for use in an electronic harmonica as claimed in claim 1,

the audio power amplifier circuit (1) comprises capacitors C15, C16, C28, C31, TC8002D chips, a resistor R1, a resistor R30 and a pin J9; the pin 1 of the TC8002D chip is connected with the pin 7 of the audio output connector (9); pins 2 and 3 of the TC8002D chip are simultaneously connected with one end of a capacitor C15, and the other end of the capacitor C15 is grounded; the pin 4 of the TC8002D chip is connected with one end of a capacitor C16 and one end of a resistor R30 at the same time, the other end of the capacitor C16 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R29 in the stereo codec (3); the other end of the resistor R30 is simultaneously connected with a No. 5 pin of the TC8002D chip and a No. 2 pin of the pin J9; pin 1 of pin J9 is connected with pin 8 of TC8002D chip; the pin 7 of the TC8002D chip is connected with one end of the capacitor C28 and one end of the capacitor C31 at the same time; the other end of the capacitor C28 and the other end of the capacitor C31 are simultaneously connected with a No. 6 pin of the TC8002D chip;

3. A circuit suitable for use in an electronic harmonica according to claim 2, characterized in that the circuit further comprises an OLED display circuit (10), pin 3 of the OLED display circuit (10) being connected to pin 63 of the control module (4).

4. A circuit suitable for use in an electronic harmonica according to claim 3, characterised in that the circuit further comprises a USB socket connector (11), the USB signal output of the USB socket connector (11) being connected to the USB signal input of the control module (4).