Touch-and-read switching audio circuit

Abstract

The utility model relates to the technical field of audio book control circuits, and discloses a point reading switching audio circuit. Comprising a power supply module, a control module, a sound module, an audio replacement module and a key module arranged on one page of the audio book, the key module is provided with a button in a row and column scanning mode, the button is connected with the control module, and the audio replacement module is provided with a TF memory card identification port for identifying a TF memory card. The TF memory card identification interface is connected with the control module, the control module is further connected with the sound module, and the power module is connected with the control module, the sound module, the key module and the storage module. The keys are integrated in a row and column scanning mode, so that the problems that an audio book is thick and heavy in book body and complex in circuit are solved, and the problem that the practical value of the audio book is low is solved through the TF memory card recognition port.

Description

Technical Field

[0001] The utility model relates to the technical field of audio book control circuits, in particular to a point-reading and switching audio circuit. Background Art

[0002] In the process of children's education and training, audio books are children's teaching materials that have appeared in recent years. Audio books can trigger the corresponding audio stored in them by clicking different reading buttons, and can be reused, which plays a good role in children's enlightenment learning.

[0003] The main contents of current audio books are solidified in the control circuit of the audio books. It is necessary to set corresponding click-to-read buttons and corresponding circuits on the corresponding pages of the book to achieve the click-to-read effect. As a result, the designed audio books are thick, the circuits are complicated, and the audio content of the book cannot be replaced, which makes the actual use value of the audio books not high. Utility Model Content

[0004] The utility model provides a point-reading switching audio circuit to solve the problems of heavy book bodies, complex circuits and the inability to change film review contents in existing audio books.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] The utility model provides a point-to-read switching audio circuit, comprising a power module, a control module and a sound module, and also comprising an audio replacement module and a key module arranged on one page of an audio book, wherein the key module is provided with a button in a row and column scanning mode, and the button is connected to the control module, the audio replacement module is provided with a TF memory card identification port for identifying a TF memory card, and the TF memory card identification interface is connected to the control module, the control module is also connected to the sound module, and the power module is connected to the control module, the sound module, the key module and the storage module.

[0007] Furthermore, the control module adopts 188SOP28 chip;

[0008] Pin 5 and pin 23 of the 188SOP28 chip are connected to the power module, pin 4 and pin 6 of the 188SOP28 chip are connected to the sound module, pin 16, pin 17, pin 18, pin 24, pin 25, pin 26, pin 27 and pin 28 of the 188SOP28 chip are connected to the key module, and pin 8, pin 9, pin 10, pin 11, pin 13, pin 14 and pin 22 of the 188SOP28 chip are connected to the audio replacement module.

[0009] Furthermore, the control module further includes a first filter capacitor C1, a second filter capacitor C2 and a fourth filter capacitor C4;

[0010] One end of the first filter capacitor C1 is connected to pin 5 of the 188SOP28 chip, and the other end is grounded;

[0011] One end of the second filter capacitor C2 is connected to pin 22 of the 188SOP28 chip, and the other end is grounded;

[0012] One end of the fourth filter capacitor C4 is connected to pin 12 of the 188SOP28 chip, and the other end is grounded.

[0013] Furthermore, the 13th pin of the 188SOP28 chip is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the 22nd pin of the 188SOP28 chip, and the emitter of the transistor Q1 is connected to the TF memory card identification interface.

[0014] Further, pins 1 to 5, 7 and 8 of the TF memory card identification interface are connected to the emitter of the transistor Q1, pin 6 of the TF memory card identification interface is grounded, and pin 9 of the TF identification interface is connected to pin 22 of the 188SOP28 chip;

[0015] Pin 2 of the TF memory card identification interface is also connected to pin 11 of the 188SOP28 chip;

[0016] Pin 7 of the TF memory card identification interface is also connected to pin 8 of the 188SOP28 chip;

[0017] The 8th pin of the TF memory card identification interface is also connected to the 14th pin of the 188SOP28 chip;

[0018] Pin 3 of the TF memory card identification interface is also connected to pin 9 of the 188SOP28 chip;

[0019] Pin 5 of the TF memory card identification interface is also connected to pin 10 of the 188SOP28 chip.

[0020] Furthermore, the key module includes 15 buttons arranged in a 3×5 row and column scanning manner;

[0021] The first to fifth rows are connected to the 28th pin of the 188SOP28 chip, the 27th pin of the 188SOP28 chip, the 26th pin of the 188SOP28 chip, the 25th pin of the 188SOP28 chip, and the 24th pin of the 188SOP28 chip respectively;

[0022] The first to third columns are connected to the 18th pin of the 188SOP28 chip, the 17th pin of the 188SOP28 chip, and the 16th pin of the 188SOP28 chip respectively.

[0023] Furthermore, the power module includes a power supply circuit and a charging circuit, and the charging circuit adopts a TP4056 chip;

[0024] Pin 4 of the TP4056 chip is connected to pin 1 of the USB interface, and is also connected to the ninth filter capacitor C9 and then grounded;

[0025] Pin 5 of the TP4056 chip is connected to the power supply circuit, the control module, the sound module, the key module and the storage module, and is also connected to the 10th filter capacitor C10 and then grounded;

[0026] Pins 6 and 7 of the TP4056 chip are both connected to the second light emitting diode D2.

[0027] Furthermore, the cathode of the power supply circuit is grounded, the anode is connected to the charging circuit, the control module, the sound module, the key module and the storage module, and is also connected to the cathode of the power supply circuit through the switch K1 and the first photodiode D1.

[0028] Furthermore, the sound module adopts TRA1309CP chip;

[0029] Pins 2 and 3 of the TRA1309CP chip are connected to pins 6 and 4 of the 188SOP28 chip respectively;

[0030] Pins 4 and 7 of the TRA1309CP chip are both connected to the power module, and pin 4 of the TRA1309CP chip is also connected to the third filter capacitor C3 and then grounded;

[0031] Pin 6 of the TRA1309CP chip is connected to the earphone port J3, and pin 8 of the TRA1309CP chip is connected to the speaker LS1.

[0032] Beneficial effects:

[0033] The utility model provides a point-reading switching audio circuit. A key module of row and column scanning sends a key signal to a control module. After receiving the key signal, the control module sends a control signal to an audio replacement module to transmit audio data. Finally, a PWM control signal is sent to a sound module to control the sound module to play corresponding audio content. The point-reading area of ​​an audio book is integrated in the form of row and column scanning of an integrated point-reading by a key module. After the key is clicked and read, the audio book is flipped for use. The volume of the audio book is reduced, which is more convenient for children to use. The circuit structure is optimized. There is no need to set a corresponding point-reading key on the corresponding page of the audio book. A TF memory card recognition interface is also provided. The audio file can be replaced in subsequent use, thereby improving the actual value of the audio book. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the module structure of a point-to-read switching audio circuit of the utility model;

[0035] Figure 2 It is a circuit diagram of the control module of the utility model;

[0036] Figure 3 It is a circuit diagram of the sound module of the utility model;

[0037] Figure 4 This is a circuit diagram of the key module of the utility model;

[0038] Figure 5 This is a circuit diagram of the audio replacement module of the utility model;

[0039] Figure 6 It is a circuit diagram of the power module of the utility model. DETAILED DESCRIPTION

[0040] The technical solution of the utility model is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0042] See also Figure 1 The embodiment of the present application provides a point-to-read switching audio circuit, including a power module, a control module and a sound module, and also includes an audio replacement module and a key module arranged on one of the pages of the audio book, the key module is provided with a button in a row and column scanning mode, and the button is connected to the control module, the audio replacement module is provided with a TF memory card identification port for identifying a TF memory card, and the TF memory card identification interface is connected to the control module, the control module is also connected to the sound module, and the power module is connected to the control module, the sound module, the key module and the storage module.

[0043] The power module is used to supply power to the audio book control circuit; the key module is used to receive the user's key information and upload the key information to the control module; the sound module is used to receive the control signal sent by the control module and emit corresponding sound; the audio replacement module is used to upload the audio information of the audio book to the control module; the control module is used to receive the information uploaded by the key module and the audio replacement module, and control the operation of the sound module.

[0044] See also Figure 2 , where the control module uses 188SOP28 chip (marked U1 in the figure);

[0045] Pin 5 and pin 23 of the 188SOP28 chip are connected to the power module, pin 4 and pin 6 of the 188SOP28 chip are connected to the sound module, pin 16, pin 17, pin 18, pin 24, pin 25, pin 26, pin 27 and pin 28 of the 188SOP28 chip are connected to the key module, and pin 8, pin 9, pin 10, pin 11, pin 13, pin 14 and pin 22 of the 188SOP28 chip are connected to the audio replacement module;

[0046] Among them, the 5th and 23rd pins of the 1688SOP24 chip are power pins, which are directly connected to the power signal VPD and take power, and are also grounded and filtered through capacitor C1. The 12th pin of the 1688SOP24 chip is grounded through capacitor C4; the 3rd pin of the 1688SOP24 chip is directly grounded, and the 22nd pin of the 1688SOP24 chip is the power signal output pin, which directly outputs the 3.3V power signal V33 and supplies power to the outside. At the same time, this pin is also grounded and filtered through capacitor C2;

[0047] See also Figure 3 The control module is connected to the audio replacement module through the transistor Q1; the 13th pin of the 188SOP28 chip is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the 22nd pin of the 188SOP28 chip to take power, the emitter of the transistor Q1 is connected to the TF memory card identification interface, and the emitter of the transistor Q1 is also grounded and filtered through the filter capacitor C6;

[0048] In specific implementation, the 13th foot of the 188SOP28 chip sends a control signal to the audio replacement module, thereby controlling the working state of the audio replacement module. When the 13th foot is at a high level, the audio replacement module works, and when the 13th foot is at a low level, the audio replacement module does not work;

[0049] In the audio replacement module, the TF memory card recognition interface ( Figure 3 Pins 1 to 5, 7 and 8 of J1 are connected to the emitter of transistor Q1, pin 6 of the TF memory card identification interface is grounded, and pin 9 of the TF identification interface is connected to pin 22 of the 188SOP28 chip;

[0050] Among them, pins 1, 2, 3, 5, 7 and 8 of the TF memory card identification interface are connected to the emitter of transistor Q1 through a 50K resistor, and pin 4 of the TF memory card identification interface is directly connected to the emitter of transistor Q1 and takes power to supply power to the read TF memory card. Pin 9 of the TF identification interface is connected to pin 22 of the 188SOP28 chip through a 1M resistor;

[0051] Pin 2 of the TF memory card identification interface is also connected to pin 11 of the 188SOP28 chip; pin 7 of the TF memory card identification interface is also connected to pin 8 of the 188SOP28 chip; pin 8 of the TF memory card identification interface is also connected to pin 14 of the 188SOP28 chip; pin 3 of the TF memory card identification interface is also connected to pin 9 of the 188SOP28 chip; pin 5 of the TF memory card identification interface is also connected to pin 10 of the 188SOP28 chip;

[0052] Among them, pins 2, 7 and 8 upload data signals; pin 3 obtains the corresponding command signal CMD; pin 5 obtains the clock signal;

[0053] Since a TF memory card identification interface is set up and the TF memory card can be replaced at any time, the audio content can be freely replaced according to actual needs.

[0054] See also Figure 4 ,The key module includes 15 buttons arranged in 3×5 row and column scanning mode;

[0055] The first to fifth rows are connected to the 28th pin of the 188SOP28 chip, the 27th pin of the 188SOP28 chip, the 26th pin of the 188SOP28 chip, the 25th pin of the 188SOP28 chip, and the 24th pin of the 188SOP28 chip respectively;

[0056] The first to third columns are connected to the 18th pin of the 188SOP28 chip, the 17th pin of the 188SOP28 chip, and the 16th pin of the 188SOP28 chip respectively.

[0057] Specifically, the key module includes 15 keys, namely S1 to S15; among them, keys S1, S4, S7, S10 and S13 are a group, keys S2, S5, S8, S11 and S14 are a group, and keys S3, S6, S9, S12 and S15 are a group;

[0058] For the first group of buttons, one end of S1 is connected to the PB0 signal of the control module, and the other end of S1 is connected to the PC2 signal of the control module; one end of S4 is connected to the PB1 signal of the control module, and the other end of S4 is connected to the PC2 signal of the control module; one end of S7 is connected to the PB2 signal of the control module, and the other end of S7 is connected to the PC2 signal of the control module; one end of S10 is connected to the PB3 signal of the control module, and the other end of S10 is connected to the PC2 signal of the control module; one end of S13 is connected to the PB4 signal of the control module, and the other end of S13 is connected to the PC2 signal of the control module; the control module can detect the operation of specific buttons in this group by comparing the PC2 signal with the PB0-PB4 signals;

[0059] For the second group of buttons: one end of S2 is connected to the PB0 signal of the control module, and the other end of S2 is connected to the PC3 signal of the control module; one end of S5 is connected to the PB1 signal of the control module, and the other end of S5 is connected to the PC3 signal of the control module; one end of S8 is connected to the PB2 signal of the control module, and the other end of S8 is connected to the PC3 signal of the control module; one end of S11 is connected to the PB3 signal of the control module, and the other end of S11 is connected to the PC3 signal of the control module; one end of S14 is connected to the PB4 signal of the control module, and the other end of S14 is connected to the PC3 signal of the control module; the control module can detect the operation of specific buttons in this group by comparing the PC3 signal with the PB0-PB4 signals;

[0060] For the third group of buttons: one end of S3 is connected to the PB0 signal of the control module, and the other end of S3 is connected to the PC4 signal of the control module; one end of S6 is connected to the PB1 signal of the control module, and the other end of S6 is connected to the PC4 signal of the control module; one end of S9 is connected to the PB2 signal of the control module, and the other end of S9 is connected to the PC4 signal of the control module; one end of S12 is connected to the PB3 signal of the control module, and the other end of S12 is connected to the PC4 signal of the control module; one end of S15 is connected to the PB4 signal of the control module, and the other end of S15 is connected to the PC4 signal of the control module; the control module can detect the operation of specific buttons in this group by comparing the PC4 signal with the PB0-PB4 signal.

[0061] In the above three groups of buttons, the control module is the 188SOP28 chip, the PB0 signal is the 28th pin of the 188SOP28 chip, the PB1 signal is the 27th pin of the 188SOP28 chip, the PB2 signal is the 26th pin of the 188SOP28 chip, the PB3 signal is the 25th pin of the 188SOP28 chip, and the PB4 signal is the 24th pin of the 188SOP28 chip;

[0062] The PC2 signal is the 18th pin of the 188SOP28 chip, the PC3 signal is the 17th pin of the 188SOP28 chip, and the PC4 signal is the 16th pin of the 188SOP28 chip.

[0063] See also Figure 5 ,The power module includes a power supply circuit (marked BT1 in the figure) and a charging circuit, and the charging circuit uses a TP4056 chip (marked U5 in the figure);

[0064] Pin 4 of the TP4056 chip is connected to pin 1 of the USB interface, and is also connected to the ninth filter capacitor C9 and then grounded;

[0065] Pin 5 of the TP4056 chip is connected to the power supply circuit, control module, sound module, key module and storage module, and is also connected to the 10th filter capacitor C10 and then grounded;

[0066] Pins 6 and 7 of the TP4056 chip are both connected to the second light emitting diode D2.

[0067] The negative electrode of the power supply circuit is grounded, and the positive electrode is connected to the charging circuit, the control module, the sound module, the key module and the storage module, and is also connected to the negative electrode of the power supply circuit through the switch K1 and the first photodiode D1.

[0068] Specifically, pin 3 of the TP4056 chip is a ground pin and is directly grounded; pin 2 of the chip is grounded through a pull-down resistor R1 to ensure the stability of the pin level; pin 4 of the TP4056 chip is a power input pin, which is directly connected to pin 1 of the USB interface J4 through a current limiting resistor R4, and then obtains an external 5V charging power supply from the USB interface J4. In addition, pin 4 is also grounded and filtered through a filter capacitor C9; pin 5 of the TP4056 chip is a charging signal pin, which directly outputs a charging signal BAT to supply power to the outside, and is also connected to the positive pole of the power supply battery to charge the power supply battery, and pin 5 is also The pull-down capacitor C10 is grounded and filtered; the 6th and 7th pins of the TP4056 chip are used as charging indication pins: the 6th pin is connected to the cathode of the indicating light emitting diode D2 through the current limiting resistor R3, the 7th pin is connected to the cathode of the indicating light emitting diode D2 through the current limiting resistor R2, and the anode of the indicating light emitting diode D2 is connected to the 1st pin of the USB interface J4 through the current limiting resistor R4. The chip lights up or turns off the indicating light emitting diode D2 through the level status of the 6th and 7th pins, thereby indicating the charging status; the 8th pin of the TP4056 chip is also directly connected to the 4th pin of the TP4056 chip to ensure the stability of the pin level;

[0069] The negative pole of the power supply battery BT1 is grounded;

[0070] The positive electrode of the power supply battery BT1 also outputs a power signal VPD through the switch K1 to supply power to the control module; similarly, the power supply VPD is also grounded through the current limiting resistor R17 and the light-emitting indicator diode D1; the light-emitting indicator diode D1 is used to indicate the state of the power signal VPD.

[0071] See also Figure 6 The sound module is a circuit composed of a TRA1309CP chip (marked U2 in the figure); Pin 1 of the TRA1309CP chip is connected to Pin 8 of the TRA1309CP chip through a resistor R14; Pins 2 and 3 of the TRA1309CP chip are PWM signal input pins, which are directly connected to the control module and obtain the corresponding PWM control signal; Pin 4 of the TRA1309CP chip is a power pin, which is directly connected to the power signal VPD through a current limiting resistor R16 and takes power, and at the same time, Pin 4 is also grounded and filtered through a filter capacitor C3; Pin 5 of the TRA1309CP chip is a ground pin and is directly grounded;

[0072] Pin 7 of the TRA1309CP chip is the power pin, which is also directly connected to the power signal VPD and draws power; Pin 6 of the TRA1309CP chip is the signal output pin, which is directly connected to the headphone port J3 and outputs the corresponding sound signal; Pin 8 of the TRA1309CP chip is the signal output pin, which is directly connected to the speaker LS1 and outputs the corresponding sound signal.

[0073] In the utility model, the button module is designed on the homepage of the audio book according to the needs. When in use, the required reading page is clicked and read through the button module, and the button information is sent to the control module through the button module, and then the reading page is turned. After receiving the button information, the control module combines the audio information stored in the TF card, sends the control information to the sound module, and emits the voice content of the corresponding reading page.

[0074] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A point-reading switching audio circuit, comprising a power module, a control module and a sound module, characterized in that: It also includes an audio replacement module and a key module arranged on one of the pages of the audio book, the key module is provided with a button for row and column scanning, and the button is connected to the control module, the audio replacement module is provided with a TF memory card identification port for identifying a TF memory card, and the TF memory card identification interface is connected to the control module, the control module is also connected to the sound module, and the power module is connected to the control module, the sound module, the key module and the storage module.

2. The point-to-read switching audio circuit according to claim 1, characterized in that: The control module adopts 188SOP28 chip; Pin 5 and pin 23 of the 188SOP28 chip are connected to the power module, pin 4 and pin 6 of the 188SOP28 chip are connected to the sound module, pin 16, pin 17, pin 18, pin 24, pin 25, pin 26, pin 27 and pin 28 of the 188SOP28 chip are connected to the key module, and pin 8, pin 9, pin 10, pin 11, pin 13, pin 14 and pin 22 of the 188SOP28 chip are connected to the audio replacement module.

3. The point-to-read switching audio circuit according to claim 2, characterized in that: The control module also includes a first filter capacitor C1, a second filter capacitor C2 and a fourth filter capacitor C4; One end of the first filter capacitor C1 is connected to pin 5 of the 188SOP28 chip, and the other end is grounded; One end of the second filter capacitor C2 is connected to pin 22 of the 188SOP28 chip, and the other end is grounded; One end of the fourth filter capacitor C4 is connected to pin 12 of the 188SOP28 chip, and the other end is grounded.

4. The point-to-read switching audio circuit according to claim 2, characterized in that: Pin 13 of the 188SOP28 chip is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to pin 22 of the 188SOP28 chip, and the emitter of the transistor Q1 is connected to the TF memory card identification interface.

5. The point-to-read switching audio circuit according to claim 4, characterized in that: Pins 1 to 5, 7 and 8 of the TF memory card identification interface are connected to the emitter of the transistor Q1, pin 6 of the TF memory card identification interface is grounded, and pin 9 of the TF identification interface is connected to pin 22 of the 188SOP28 chip; Pin 2 of the TF memory card identification interface is also connected to pin 11 of the 188SOP28 chip; Pin 7 of the TF memory card identification interface is also connected to pin 8 of the 188SOP28 chip; The 8th pin of the TF memory card identification interface is also connected to the 14th pin of the 188SOP28 chip; Pin 3 of the TF memory card identification interface is also connected to pin 9 of the 188SOP28 chip; Pin 5 of the TF memory card identification interface is also connected to pin 10 of the 188SOP28 chip.

6. The point-to-read switching audio circuit according to claim 2, characterized in that: The key module includes 15 buttons, which are arranged in a 3×5 row and column scanning mode; The first to fifth rows are connected to the 28th pin of the 188SOP28 chip, the 27th pin of the 188SOP28 chip, the 26th pin of the 188SOP28 chip, the 25th pin of the 188SOP28 chip, and the 24th pin of the 188SOP28 chip respectively; The first to third columns are connected to the 18th pin of the 188SOP28 chip, the 17th pin of the 188SOP28 chip, and the 16th pin of the 188SOP28 chip respectively.

7. The point-to-read switching audio circuit according to claim 2, characterized in that: The power module includes a power supply circuit and a charging circuit, and the charging circuit adopts a TP4056 chip; Pin 4 of the TP4056 chip is connected to pin 1 of the USB interface, and is also connected to the ninth filter capacitor C9 and then grounded; Pin 5 of the TP4056 chip is connected to the power supply circuit, the control module, the sound module, the key module and the storage module, and is also connected to the 10th filter capacitor C10 and then grounded; Pins 6 and 7 of the TP4056 chip are both connected to the second light emitting diode D2.

8. The point-to-read switching audio circuit according to claim 7, characterized in that: The negative electrode of the power supply circuit is grounded, the positive electrode is connected to the charging circuit, the control module, the sound module, the key module and the storage module, and is also connected to the negative electrode of the power supply circuit through the switch K1 and the first photodiode D1.

9. The point-to-read switching audio circuit according to claim 2, characterized in that: The sound module adopts TRA1309CP chip; Pins 2 and 3 of the TRA1309CP chip are connected to pins 6 and 4 of the 188SOP28 chip respectively; Pins 4 and 7 of the TRA1309CP chip are both connected to the power module, and pin 4 of the TRA1309CP chip is also connected to the third filter capacitor C3 and then grounded; Pin 6 of the TRA1309CP chip is connected to the earphone port J3, and pin 8 of the TRA1309CP chip is connected to the speaker LS1.

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