CN210837110U - A control circuit of a kindergarten learning machine - Google Patents

Abstract

The utility model discloses a control circuit of children's teaching learning machine, including host system, power conversion circuit, battery, wireless transmitting module, DDR work module, TF grafting storage circuit, power amplifier echo processing circuit, loudspeaker, WIFI circuit, LCD screen and data switching seat of filling, power conversion circuit's output is connected to host system's input, and the battery links to each other with power conversion circuit. In the control circuit of the children teaching and learning machine, the master control module generates TTL signals to the liquid crystal screen so as to drive the liquid crystal screen to normally work and send audio and video data to the liquid crystal screen for display; a WIFI circuit is arranged to realize that the network television can be watched in the environment with the network at any time and any place; the power amplifier echo processing circuit is connected in, the beautiful sound quality is guaranteed, no echo interference exists, and it is all suitable that children sing K old people for square dance.

Description

A control circuit of a kindergarten learning machine

technical field

The utility model relates to the technical field of preschool education learning machines, in particular to a control circuit of a preschool education learning machine.

Background technique

At present, in the preschool learning machine market, most of the screens have low resolution, lack of clarity, limited content, and limited learning guidance for young children. There are many components on the main board, the layout is not simple enough and low power consumption, and most of them are out of power and need an external power supply Charging is unsafe for young children to use. Based on this, a control circuit for a learning machine for preschool education is proposed.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a control circuit for a learning machine for preschool education, which has the advantages of displaying audio and video data, watching Internet TV anytime and anywhere in an environment with a network, with little echo interference, no need for an external power supply, and safety. It solves the problems of low safety for young children and limited learning in the prior art.

In order to achieve the above purpose, the utility model provides the following technical solutions: a control circuit of a preschool learning machine, comprising a main control module, a power conversion circuit, a battery, a wireless charging and transmitting module, a DDR working module, a TF plug-in storage circuit, and a power amplifier echo A processing circuit, a speaker, a WIFI circuit, a liquid crystal screen and a data adapter, the output end of the power conversion circuit is connected to the input end of the main control module, the battery is connected to the power conversion circuit, and the wireless charging and transmitting module is connected to the power conversion circuit, The main control module, DDR working module, TF plug-in storage circuit, power amplifier echo processing circuit and WIFI circuit are all connected to the output end of the power conversion circuit, the speaker is connected to the output end of the power amplifier echo processing circuit, and the DDR working module is connected to the main control module , the TF plug-in storage circuit is connected to the main control module, the input end of the power amplifier echo processing circuit is connected to the output end of the main control module, the WIFI circuit is connected to the input end of the main control module, and is connected to the antenna; the input of the LCD screen The terminal is connected to the output terminal of the data adapter, and the input terminal of the data adapter is connected to the output terminal of the main control module.

Preferably, the WIFI circuit includes a transistor Q13, a field effect transistor Q2 and a pin header J5, the base of the transistor Q13 is connected to the output terminal of the resistor R1, the input terminal of the resistor R1 is connected to the +5V power supply terminal, and the emission terminal of the transistor Q13 The electrode is grounded, the collector of the transistor Q13 is connected to the source of the field effect transistor Q2, the gate of the field effect transistor Q2 is connected to the +5V power supply terminal, the drain of the field effect transistor Q2 is connected to the pin 1 of the pin header J5, and is connected in parallel VCC-LCD terminal output.

Preferably, the liquid crystal screen includes a chip CON2, and the pins 4 and 5 of the chip CON2 are connected to the input end of the capacitor C1, and are connected to the input end of the capacitor C2 and the drain of the field effect transistor Q2, the capacitor C1 and the capacitor The output terminal of C2 is connected to ground.

Preferably, the power amplifier echo processing circuit includes a chip U13, the model of the chip U13 is PT2399, the pin 1 of the chip U13 is connected to the output end of the resistor R97, and is connected to the collector of the transistor Q7, the emitter of the transistor Q7 and the resistor R97 The input terminal is connected to the VCC-5V power supply terminal, the base of the transistor Q7 is connected to the input terminal of the resistor R109, the output terminal of the resistor R109 is connected to the collector of the transistor Q9, the emitter of the transistor Q9 is grounded, and the base of the transistor Q9 is connected To the output end of the resistor R117, the input end of the resistor R117 is connected to the input of the MIC-POWER terminal; the pin 16 of the chip U13 is connected to the input end of the resistor R120, and is connected to the input end of the capacitor C164, and the pin 15 of the chip U13 is connected To the input of the resistor R121, and connected to the output of the capacitor C164, the resistor R120 and the output of the resistor R121 are connected to the input of the resistor R119, and the output of the resistor R119 is connected to the MIC-MAIN terminal.

Preferably, the TF plug-in storage circuit includes a pin header J7, the model of the pin header J7 is TF-CKT01-009D, the pin 1 of the pin header J7 is connected to the SDCO-D2 terminal, and the pin 2 of the pin header J7 is connected to the SDCO- D3 terminal, pin 3 of pin header J7 is connected to SDCO-CMD terminal, pin 4 of pin header J7 is connected to the output end of resistor R91, the input end of resistor R91 is connected to the input end of VCC-CARD power supply, pin 5 of pin header J7 Connect to the output of resistor R95 and the input of resistor R95 to the SDCO-CLK terminal.

Compared with the prior art, the beneficial effects of the present utility model are as follows:

The control circuit and power conversion circuit of this kindergarten learning machine receive the energy of the wireless charging and transmitting module, generate 5V power supply to power the main control module and battery, and convert the power supply into 3.3V, 1.8V, 2.5V, 3.0V, 18V, 6.8 V and other voltages supply power to different modules, and the main control module generates TTL signals to the LCD screen to drive the LCD screen to work normally, and send audio and video data to the LCD screen for display; set up WIFI circuit to realize viewing anytime, anywhere in a networked environment Internet TV; access to the power amplifier echo processing circuit to ensure beautiful sound quality without echo interference, suitable for children to sing K old people for square dance.

Description of drawings

Fig. 1 is the system block diagram of the utility model;

Fig. 2 is the WIFI circuit diagram of the utility model;

Fig. 3 is the working principle diagram of the liquid crystal screen of the utility model;

4 is a circuit diagram of a power amplifier echo processing circuit of the present invention;

FIG. 5 is a circuit diagram of a TF plug-in storage circuit of the present invention.

In the figure: 1. Main control module; 2. Power conversion circuit; 3. Battery; 4. Wireless charging and transmitting module; 5. DDR working module; 6. TF plug-in storage circuit; 7. Power amplifier echo processing circuit; 8. Speaker 9. WIFI circuit; 10. LCD screen; 11. Data adapter.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figure 1-5, a control circuit of a kindergarten learning machine, including a main control module 1, a power conversion circuit 2, a battery 3, a wireless charging and transmitting module 4, a DDR working module 5, a TF plug-in storage circuit 6, a power amplifier echo Processing circuit 7, speaker 8, WIFI circuit 9, LCD screen 10 and data adapter 11, the output end of the power conversion circuit 2 is connected to the input end of the main control module 1, the battery 3 is connected to the power conversion circuit 2, wireless charging and transmitting The module 4 is connected to the power conversion circuit 2, the main control module 1, the DDR working module 5, the TF plug-in storage circuit 6, the power amplifier echo processing circuit 7 and the WIFI circuit 9 are all connected to the output of the power conversion circuit 2, and the speaker 8 is connected to The output end of the power amplifier echo processing circuit 7, the DDR working module 5 is connected to the main control module 1, the TF plug-in storage circuit 6 is connected to the main control module 1, and the input end of the power amplifier echo processing circuit 7 is connected to the output end of the main control module 1 , the WIFI circuit 9 is connected to the input end of the main control module 1, and is connected to the antenna; the input end of the LCD screen 10 is connected to the output end of the data adapter 11, and the input end of the data adapter 11 is connected to the main control module 1. 's output.

Among them: the WIFI circuit 9 includes a transistor Q13, a field effect transistor Q2 and a pin header J5, the base of the transistor Q13 is connected to the output terminal of the resistor R1, the input terminal of the resistor R1 is connected to the +5V power supply terminal, and the emitter of the transistor Q13 is grounded , the collector of the transistor Q13 is connected to the source of the field effect transistor Q2, the gate of the field effect transistor Q2 is connected to the +5V power supply terminal, the drain of the field effect transistor Q2 is connected to the pin 1 of the pin header J5, and connected to VCC- LCD terminal output.

Wherein: the LCD screen 10 includes a chip CON2, the pins 4 and 5 of the chip CON2 are connected to the input end of the capacitor C1, and are connected to the input end of the capacitor C2 and the drain of the field effect transistor Q2, the capacitor C1 and the capacitor C2 The output terminals are connected to ground.

Among them: the power amplifier echo processing circuit 7 includes the chip U13, the model of the chip U13 is PT2399, the pin 1 of the chip U13 is connected to the output terminal of the resistor R97, and is connected to the collector of the transistor Q7, the emitter of the transistor Q7 and the input of the resistor R97 The terminal is connected to the VCC-5V power supply terminal, the base of the transistor Q7 is connected to the input of the resistor R109, the output of the resistor R109 is connected to the collector of the transistor Q9, the emitter of the transistor Q9 is grounded, and the base of the transistor Q9 is connected to the resistor The output terminal of R117, the input terminal of the resistor R117 is connected to the input of the MIC-POWER terminal; the pin 16 of the chip U13 is connected to the input terminal of the resistor R120, and is connected to the input terminal of the capacitor C164, and the pin 15 of the chip U13 is connected to the input terminal of the resistor R121. The input terminal is connected to the output terminal of the capacitor C164, the output terminal of the resistor R120 and the resistor R121 are connected to the input terminal of the resistor R119, and the output terminal of the resistor R119 is connected to the MIC-MAIN terminal.

Among them: TF plug-in storage circuit 6 includes pin header J7, the model of pin header J7 is TF-CKT01-009D, pin 1 of pin header J7 is connected to SDCO-D2 terminal, pin 2 of pin header J7 is connected to SDCO-D3 terminal , pin 3 of pin header J7 is connected to SDCO-CMD terminal, pin 4 of pin header J7 is connected to the output end of resistor R91, the input end of resistor R91 is connected to the input end of VCC-CARD power supply, pin 5 of pin header J7 is connected to The output of resistor R95 and the input of resistor R95 are connected to the SDCO-CLK terminal.

The control circuit of the preschool learning machine, the power conversion circuit 2 receives the energy of the wireless charging and transmitting module 4, performs energy conversion, and generates a 5V power supply to supply power to the main control module 1 and the battery 3, and the power conversion circuit 2 converts the received power into 3.3 V, 1.8V, 2.5V, 3.0V, 18V, 6.8V and other voltages supply power to different modules, the main control module 1 generates a TTL signal to the LCD screen 10 to drive the LCD screen 10 to work normally, and send audio and video data to the LCD screen 10 is displayed; the wireless charging and transmitting module 4 is used to prevent damage to its components when the host is charged to the wireless charging and transmitting module 4. An anti-backflow circuit is set in the wireless charging and transmitting module 4, that is, when the wireless charging mode or the external charging mode of the host is used. , the power of the host cannot be connected to the wireless charging and transmitting module 4; set the WIFI circuit 9 to realize watching Internet TV anytime, anywhere in an environment with a network; access the power amplifier echo processing circuit 7 to ensure beautiful sound quality without echo interference, children sing K old people are suitable for square dance.

To sum up: the control circuit of the preschool learning machine, the power conversion circuit 2 receives the energy of the wireless charging and transmitting module 4, generates a 5V power supply to supply power to the main control module 1 and the battery 3, and converts the power into 3.3V, 1.8V, 2.5V, 3.0V, 18V, 6.8V and other voltages supply power to different modules, connect battery 3 for power supply, no external power supply is required, main control module 1 generates TTL signal to LCD screen 10 to drive LCD screen 10 to work normally and convert audio and video data It is transmitted to the LCD screen 10 for display; the WIFI circuit 9 is set to realize watching Internet TV anytime and anywhere in an environment with a network; the echo processing circuit 7 of the power amplifier is connected to ensure beautiful sound quality without echo interference, children sing K old people use it as a square Dance is appropriate.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The utility model provides a control circuit of children's teaching learning machine, includes host system (1), power conversion circuit (2), battery (3), wireless transmitting module (4), DDR work module (5), TF grafting storage circuit (6), power amplifier echo processing circuit (7), loudspeaker (8), WIFI circuit (9), LCD screen (10) and data switching seat (11), its characterized in that: the output end of the power conversion circuit (2) is connected to the input end of the main control module (1), the battery (3) is connected with the power conversion circuit (2), the wireless charging and transmitting module (4) is connected to the power conversion circuit (2), the main control module (1), the DDR working module (5), the TF plug-in storage circuit (6), the power amplifier echo processing circuit (7) and the WIFI circuit (9) are connected to the output end of the power conversion circuit (2), the loudspeaker (8) is connected to the output end of the power amplifier echo processing circuit (7), the DDR working module (5) is connected with the main control module (1), the TF plug-in storage circuit (6) is connected with the main control module (1), the input end of the power amplifier echo processing circuit (7) is connected to the output end of the main control module (1), and the WIFI circuit (9) is connected to the input end of the main control module (1) and is connected to an antenna; the input end of the liquid crystal screen (10) is connected to the output end of the data adapter (11), and the input end of the data adapter (11) is connected to the output end of the main control module (1).

2. The control circuit of a children's teaching learning machine according to claim 1, wherein: the WIFI circuit (9) comprises a triode Q13, a field effect transistor Q2 and a pin header J5, the base of the triode Q13 is connected to the output end of a resistor R1, the input end of the resistor R1 is connected to a +5V power supply terminal, the emitter of a triode Q13 is grounded, the collector of the triode Q13 is connected to the source of the field effect transistor Q2, the gate of a field effect transistor Q2 is connected to the +5V power supply terminal, and the drain of the field effect transistor Q2 is connected to a pin 1 of the pin header J5 and is connected with VCC-LCD terminal output.

3. The control circuit of a children's teaching learning machine according to claim 1, wherein: the liquid crystal screen (10) comprises a chip CON2, wherein a pin 4 and a pin 5 of the chip CON2 are connected and then connected to an input end of a capacitor C1, the input end of the capacitor C2 is connected with a drain electrode of a field effect transistor Q2, and an output end of the capacitor C1 and an output end of a capacitor C2 are connected and then grounded.

4. The control circuit of a children's teaching learning machine according to claim 1, wherein: the POWER amplifier echo processing circuit (7) comprises a chip U13, wherein the model of the chip U13 is PT2399, a pin 1 of the chip U13 is connected to the output end of a resistor R97 and is connected to the collector of a triode Q7, the emitter of the triode Q7 and the input end of a resistor R97 are connected to a VCC-5V POWER supply terminal, the base of the triode Q7 is connected to the input end of a resistor R109, the output end of the resistor R109 is connected to the collector of the triode Q9, the emitter of the triode Q9 is grounded, the base of the triode Q9 is connected to the output end of a resistor R117, and the input end of the resistor R117 is connected to the input end of an; pin 16 of the chip U13 is connected to the input terminal of the resistor R120 and to the input terminal of the capacitor C164, pin 15 of the chip U13 is connected to the input terminal of the resistor R121 and to the output terminal of the capacitor C164, the output terminals of the resistor R120 and the resistor R121 are connected and then connected to the input terminal of the resistor R119, and the output terminal of the resistor R119 is connected to the MIC-MAIN terminal.

5. The control circuit of a children's teaching learning machine according to claim 1, wherein: the TF plug-in memory circuit (6) comprises a pin bank J7, the pin bank J7 is TF-CKT01-009D in model number, pin 1 of the pin bank J7 is connected to a SDCO-D2 terminal, pin 2 of the pin bank J7 is connected to a SDCO-D3 terminal, pin 3 of the pin bank J7 is connected to a SDCO-CMD terminal, pin 4 of the pin bank J7 is connected to an output terminal of a resistor R91, an input terminal of the resistor R91 is connected to a VCC-CARD power supply input terminal, pin 5 of the pin bank J7 is connected to an output terminal of the resistor R95, and an input terminal of the resistor R95 is connected to a SDCO-CLK terminal.

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