Teaching development board

Abstract

The utility model relates to a teaching development board which comprises a substrate, a control module, a first expansion interface and a power supply module. The control module is arranged on the substrate; the first expansion interface is arranged on the substrate, and the universal end of the first expansion interface is electrically connected to the first universal end of the control module; the power supply module is arranged on the substrate and provided with a first power supply end and a second power supply end, and the first power supply end and the second power supply end are electrically connected to the first power supply end and the second power supply end of the first expansion interface in a one-to-one correspondence mode. According to the utility model, double-voltage power supply is realized through the power supply module, and a user does not need to externally connect a level conversion module. Therefore, the operation steps can be simplified, and the teaching experiment efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of development board technology, specifically to a teaching development board. Background Technology

[0002] Development boards, as popular tools in hardware design and engineering development, have attracted widespread attention from students, technical experts, and product developers. To help these groups quickly master development board technology, specialized learning development boards, also known as experimental boards, have emerged on the market.

[0003] Currently, to accommodate more electronic components, expansion interfaces are typically provided on educational development boards. Although these expansion interfaces have dual-voltage power supply ports, the educational development board only supports a single voltage. When the voltage required by a peripheral device differs from the power supply voltage of the educational development board, a level conversion module is needed between the power supply terminal of the educational development board and the expansion interface to switch the voltage. This requires users to repeatedly use the level conversion module, reducing ease of use. Utility Model Content

[0004] Based on the above description, this utility model provides a teaching development board, which aims to solve the problem that existing teaching development boards require a level conversion module to achieve voltage switching, resulting in insufficient ease of use.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] An educational development board includes:

[0007] substrate;

[0008] The control module is located on the substrate;

[0009] A first expansion interface is provided on the substrate, and the general-purpose terminal of the first expansion interface is electrically connected to the first general-purpose terminal of the control module.

[0010] A power supply module is disposed on the substrate. The power supply module has a first power supply terminal and a second power supply terminal. The first power supply terminal and the second power supply terminal are electrically connected to the first power supply terminal and the second power supply terminal of the first expansion interface in a one-to-one correspondence.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the control module includes a first power supply circuit and a second power supply circuit. The input terminal of the first power supply circuit is used to connect to a power supply, and the output terminal of the first power supply circuit serves as the first power supply terminal. The input terminal of the second power supply circuit is electrically connected to the first power supply terminal, and the output terminal of the second power supply circuit serves as the second power supply terminal.

[0013] Furthermore, the second power supply circuit includes a voltage regulator, the third pin of which serves as the input terminal of the second power supply circuit, and the second pin of which serves as the output terminal of the second power supply circuit.

[0014] Furthermore, the second power supply circuit includes a first capacitor and a second capacitor. One end of the first capacitor is electrically connected to the third pin of the voltage regulator, and one end of the second capacitor is electrically connected to the second pin of the voltage regulator. The other ends of the first capacitor and the other ends of the second capacitor are both grounded.

[0015] Furthermore, it includes a drive expansion unit disposed on the substrate. The drive expansion unit includes a first expansion interface and a first drive module. The power supply terminal of the first expansion interface is electrically connected to the second power supply terminal. The control input terminal of the first drive module is electrically connected to the control output terminal of the first expansion interface. The data transmission terminal and clock terminal of the first drive module are electrically connected to the data transmission terminal and clock terminal of the control module in a one-to-one correspondence.

[0016] Furthermore, it includes a second driving module, which is disposed on the substrate. The first control input terminal and the second control input terminal of the second driving module are electrically connected to the first control output terminal and the second control output terminal of the control module in a one-to-one correspondence. The power supply terminal of the second driving module is electrically connected to the second power supply terminal.

[0017] Furthermore, the serial port download module is disposed on the substrate, and the first output terminal and the second output terminal of the serial port download module are electrically connected to the first input terminal and the second input terminal of the control module in a one-to-one correspondence. The power supply terminal of the serial port download module is electrically connected to the second power supply terminal.

[0018] Furthermore, it includes a button module, which is disposed on the substrate. The first output terminal and the second output terminal of the button module are electrically connected to the first input terminal and the second input terminal of the control module in a one-to-one correspondence. The power supply terminal of the button module is electrically connected to the first power supply terminal.

[0019] Furthermore, it includes a buzzer, which is disposed on the substrate. The input terminal of the buzzer is electrically connected to the second general-purpose terminal of the control module, and the power supply terminal of the buzzer is electrically connected to the second power supply terminal.

[0020] Furthermore, the system includes colored lights, which are disposed on the substrate. The input terminal of the colored lights is electrically connected to the third general-purpose terminal of the control module, and the power supply terminal of the colored lights is electrically connected to the second power supply terminal.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0022] (1) This utility model uses a dual-voltage power supply module, eliminating the need for users to connect an external level conversion module. This simplifies the operation steps and improves the efficiency of teaching experiments.

[0023] (2) This utility model can increase the number of connected sensors or servos through the first drive module. The first expansion interface can provide a 3.3V power supply voltage for the connected sensors or servos.

[0024] (3) This utility model uses a serial port download module to download the program into the memory of the control module, thereby enabling the control module to perform corresponding logic processing. This ensures the flexibility of the control module and enables online programming and debugging of the program. Attached Figure Description

[0025] Figure 1 This is a circuit connection diagram of a teaching development board provided in an embodiment of the present utility model;

[0026] Figure 2 This is a circuit diagram of the control module in an embodiment of the present invention;

[0027] Figure 3 This is a circuit diagram of the first expansion interface in an embodiment of this utility model;

[0028] Figure 4 This is a circuit diagram of the first power supply circuit in an embodiment of the present invention;

[0029] Figure 5 This is a circuit diagram of the second power supply circuit in an embodiment of this utility model;

[0030] Figure 6 This is a circuit diagram of the second expansion interface in an embodiment of this utility model;

[0031] Figure 7 This is a circuit diagram of the first driving module in an embodiment of the present invention;

[0032] Figure 8 This is a circuit diagram of the second driving module in an embodiment of the present invention;

[0033] Figure 9 This is a circuit diagram of the serial port download module in an embodiment of this utility model;

[0034] Figure 10 This is a circuit diagram of the button module in an embodiment of the present invention;

[0035] Figure 11This is a circuit diagram of the buzzer in an embodiment of the present invention;

[0036] Figure 12 This is a circuit diagram of the colored lights in an embodiment of this utility model;

[0037] Figure 13 This is a circuit diagram of the first indicator circuit and indicator unit in an embodiment of the present utility model;

[0038] Figure 14 This is a front view of a teaching development board provided in an embodiment of this utility model;

[0039] Figure 15 This is a rear view of a teaching development board provided in an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Substrate;

[0042] 2. Control module;

[0043] 3. First expansion interface;

[0044] 4. Power supply module; 41. First power supply circuit; 42. Second power supply circuit; U3. Voltage regulator; C7. First capacitor; C8. Second capacitor;

[0045] 5. Driver expansion unit; 51. First expansion interface; 52. First driver module;

[0046] 6. Second drive module;

[0047] 7. Serial port download module; 71. Conversion circuit; 72. Serial port download circuit;

[0048] 8. Button module; 81. Reset unit; 811. First resistor voltage divider circuit; 812. Reset button; 82. Start unit; 821. Second resistor voltage divider circuit; 822. Start button;

[0049] 9. Buzzer;

[0050] 10. Colored lanterns;

[0051] 11. First indicator circuit;

[0052] 12. Indicator unit; 121. Second indicator circuit; 122. Third indicator circuit; 123. Fourth indicator circuit. Detailed Implementation

[0053] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0055] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0056] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0057] Reference Figures 1-2 As shown in Figure 14, this utility model provides a technical solution: a teaching development board, including a base plate 1, a control module 2, a first expansion interface 3, and a power supply module 4; the control module 2 is disposed on the base plate 1; the first expansion interface 3 is disposed on the base plate 1, and the general-purpose terminal of the first expansion interface 3 is electrically connected to the first general-purpose terminal of the control module 2; the power supply module 4 is disposed on the base plate 1, and the power supply module 4 has a first power supply terminal and a second power supply terminal, and the first power supply terminal and the second power supply terminal are electrically connected to the first power supply terminal and the second power supply terminal of the first expansion interface 3 in a one-to-one correspondence.

[0058] For example, the model of control module 2 can be ESP32-S3-MINI-1, etc.

[0059] In this embodiment, for example, the first power supply terminal can be 5V and the second power supply terminal can be 3.3V. With dual-voltage power supply from the power supply module 4, the user does not need to connect an external level conversion module. This simplifies the operation and improves the efficiency of teaching experiments.

[0060] Reference Figures 4-5 As shown, in some embodiments, the control module 2 includes a first power supply circuit 41 and a second power supply circuit 42. The input terminal of the first power supply circuit 41 is used to connect to a power supply, and the output terminal of the first power supply circuit 41 serves as a first power supply terminal. The input terminal of the second power supply circuit 42 is electrically connected to the first power supply terminal, and the output terminal of the second power supply circuit 42 serves as a second power supply terminal.

[0061] In this embodiment, for example, the first power supply circuit 41 can supply 5V, and the second power supply circuit 42 can supply 3.3V. During dual-voltage power supply, the power supply inputs a supply voltage to the first power supply circuit 41, which then steps down the supply voltage to 5V, enabling the first power supply circuit 41 to supply 5V. Simultaneously, the 5V supply voltage is input to the second power supply circuit 42, which steps down the 5V supply voltage to 3.3V, enabling the second power supply circuit 42 to supply 3.3V.

[0062] Reference Figure 5 As shown, in some embodiments, the second power supply circuit 42 includes a voltage regulator U3, the third pin of which serves as the input terminal of the second power supply circuit 42, and the second pin of which serves as the output terminal of the second power supply circuit 42.

[0063] For example, the voltage regulator U3 could be model AS2830AT, etc.

[0064] In this embodiment, the voltage regulator U3 can achieve efficient voltage reduction without complex external circuitry, which can optimize the routing of the inner layer of the substrate 1.

[0065] Reference Figure 5 As shown, in some embodiments, the second power supply circuit 42 includes a first capacitor C7 and a second capacitor C8. One end of the first capacitor C7 is electrically connected to the third pin of the voltage regulator U3, and one end of the second capacitor C8 is electrically connected to the second pin of the voltage regulator U3. The other ends of the first capacitor C7 and the other ends of the second capacitor C8 are both grounded.

[0066] In this embodiment, when the first power supply circuit 41 inputs a 5V power supply voltage to the voltage regulator U3, the first capacitor C7 is used to filter out high-frequency noise from the input 5V power supply voltage, thereby preventing the 5V power supply voltage from affecting the operating stability of the voltage regulator U3. When the voltage regulator U3 outputs a 3.3V power supply voltage, the second capacitor C8 is used to suppress transient voltage fluctuations at the second pin of the voltage regulator U3, ensuring the purity of the 3.3V power supply voltage.

[0067] Reference Figure 1 , 6 As shown in Figures 7 and 14-15, in some embodiments, the teaching development board includes a driving expansion unit 5, which is disposed on the substrate 1. The driving expansion unit 5 includes a first expansion interface 3 and a first driving module 52. The power supply terminal of the first expansion interface 3 is electrically connected to a second power supply terminal. The control input terminal of the first driving module 52 is electrically connected to the control output terminal of the first expansion interface 3. The data transmission terminal and clock terminal of the first driving module 52 are electrically connected to the data transmission terminal and clock terminal of the control module 2 in a one-to-one correspondence.

[0068] For example, the first drive module 52 may be of the model PCA9685, etc.

[0069] In this embodiment, the first drive module 52 can increase the number of connected sensors or servos. The first expansion interface 3 can provide a 3.3V power supply voltage to the connected sensors or servos.

[0070] Reference Figure 1 , 8 As shown in Figure 15, in some embodiments, the teaching development board includes a second driving module 6, which is disposed on the substrate 1. The first control input terminal and the second control input terminal of the second driving module 6 are electrically connected to the first control output terminal and the second control output terminal of the control module 2 in a one-to-one correspondence. The power supply terminal of the second driving module 6 is electrically connected to the second power supply terminal.

[0071] For example, the model of the second drive module 6 can be DRV8870DDAR, etc.

[0072] In this embodiment, the first and second output terminals of the second drive module 6 are used to connect to a motor, etc. After receiving the control signal from the control module 2, the drive module can drive the motor to run.

[0073] Reference Figure 1 and 8 As shown, in some embodiments, the teaching development board includes a serial port download module 7, which is disposed on the substrate 1. The first output terminal and the second output terminal of the serial port download module 7 are electrically connected to the first input terminal and the second input terminal of the control module 2 in a one-to-one correspondence. The power supply terminal of the serial port download module 7 is electrically connected to the second power supply terminal.

[0074] In this embodiment, the user can download the program into the memory of the control module 2 via the serial port download module 7, thereby enabling the control module 2 to perform corresponding logic processing. This ensures the flexibility of the control module 2 and enables online programming and debugging of the program.

[0075] Reference Figure 8 and 15 As shown, in some embodiments, the serial port download module 7 includes a conversion circuit 71 and an automatic download circuit. The first input terminal and the second input terminal of the automatic download circuit are electrically connected to the second output terminal and the first output terminal of the conversion circuit 71 in a one-to-one correspondence. The first output terminal of the automatic download circuit serves as the first output terminal of the serial port download module 7, and the second output terminal of the automatic download circuit serves as the second output terminal of the serial port download module 7.

[0076] In this embodiment, the conversion circuit 71 performs USB to TTL conversion to facilitate the control module 2 in parsing the user-input program code. After completing the USB to TTL conversion, the automatic download circuit changes the levels of its first and second output terminals to enable the control module 2 to begin downloading the program code.

[0077] Reference Figure 1 , 9 As shown in Figure 14, in some embodiments, the teaching development board includes a button module 8, which is disposed on the substrate 1. The first output terminal and the second output terminal of the button module 8 are electrically connected to the first input terminal and the second input terminal of the control module 2 in a one-to-one correspondence. The power supply terminal of the button module 8 is electrically connected to the first power supply terminal.

[0078] In this embodiment, the button module 8 sends a reset signal and a start signal to the control module 2 to control the reset and start / stop of the teaching development board.

[0079] Reference Figure 9 As shown, in some embodiments, the button module 8 includes a reset unit 81 and a start unit 82. The reset unit 81 includes a first resistor voltage divider circuit 811 and a reset button 812. The output terminal of the first resistor voltage divider circuit 811 serves as the first output terminal of the button module 8. One end of the reset button 812 is electrically connected to the input terminal of the first resistor voltage divider circuit 811. The start unit 82 includes a second resistor voltage divider circuit 821 and a start button 822. The output terminal of the second resistor voltage divider circuit 821 serves as the second output terminal of the button module 8. One end of the start button 822 is electrically connected to the input terminal of the second resistor voltage divider circuit 821. The other ends of the reset button 812 and the other ends of the start button 822 are both grounded.

[0080] In this embodiment, when the reset button 812 is pressed, the voltage divider circuit 811 generates a reset signal that meets the threshold requirement at the first input terminal of the control module 2, causing the control module 2 to perform a reset operation or the serial port download module 7 to stop downloading. When the start button 822 is pressed, the voltage divider circuit 821 generates a start signal that meets the threshold requirement at the second input terminal of the control module 2, causing the control module 2 to start downloading via the serial port download module 7.

[0081] Reference Figure 1 and 10 As shown, in some embodiments, the teaching development board includes a buzzer 9, which is disposed on the substrate 1. The input terminal of the buzzer 9 is electrically connected to the second general terminal of the control module 2, and the power supply terminal of the buzzer 9 is electrically connected to the second power supply terminal.

[0082] For example, the model of buzzer 9 could be BEEP35, etc.

[0083] In this embodiment, when the user is performing an operation, the control module 2 can play voice prompts or alarm prompts through the buzzer 9 to facilitate the user's operation.

[0084] Reference Figure 1 and 12 As shown, in some embodiments, the teaching development board includes a colored light 10, which is disposed on the substrate 1. The input terminal of the colored light 10 is electrically connected to the third general terminal of the control module 2, and the power supply terminal of the colored light 10 is electrically connected to the second power supply terminal.

[0085] For example, the model of the colored light 10 can be WS2812, etc.

[0086] In this embodiment, the single-bus control method of the colored light 10 saves the I / O resources of the control module 2, thereby ensuring that the control module 2 can connect to more external devices. Furthermore, the colored light 10 can provide multiple colors of light cues when the user is operating it.

[0087] Reference Figure 1 and 13 As shown, in some embodiments, the teaching development board includes a first indicator circuit 11, which is disposed on the substrate 1. The input terminal of the first indicator circuit 11 is electrically connected to the third output terminal of the second driving module 6, and the output terminal of the first indicator circuit 11 is grounded.

[0088] For example, the first indicator circuit 11 may include a light-emitting diode LD4 and a resistor R19, one end of which is electrically connected to the negative terminal of the light-emitting diode LD4, and the other end of which is grounded.

[0089] In this embodiment, the first indicator circuit 11 lights up when the drive module outputs a high level, thus intuitively reflecting the operating status of the drive module.

[0090] Reference Figure 1 and 13 As shown, in some embodiments, the teaching development board includes an indicator unit 12, which is disposed on the substrate 1. The indicator unit 12 includes a second indicator circuit 121, a third indicator circuit 122, and a fourth indicator circuit 123. The input terminals of the second indicator circuit 121, the third indicator circuit 122, and the fourth indicator circuit 123 are all electrically connected to a second power supply terminal. The output terminals of the second indicator circuit 121 and the third indicator circuit 122 are electrically connected to the communication transmitter and the communication receiver of the control module 2 in a one-to-one correspondence.

[0091] For example, the structures of the second indicator circuit 121, the third indicator circuit 122, and the fourth indicator circuit 123 are the same as those of the first indicator circuit 11.

[0092] In this embodiment, multiple independent indicator circuits facilitate debugging of serial communication. Learners can quickly verify the correctness of data transmission by observing the lighting status, thereby enhancing the teaching experience.

[0093] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A teaching development board, characterized in that, The application relates to a control module and a drive expansion unit. The application relates to a control module and a drive expansion unit. The application relates to a control module and a drive expansion unit. The application relates to a control module and a drive expansion unit. The application relates to a control module and a drive expansion unit.

2. The educational development board of claim 1, wherein, The application relates to a control module and a drive expansion unit.

3. The educational development board of claim 2, wherein, The application relates to a control module and a drive expansion unit.

4. The educational development board of claim 3, wherein, The application relates to a control module and a drive expansion unit.

5. The educational development board of claim 1, wherein, The application relates to a control module and a drive expansion unit.

6. The educational development board of claim 1, wherein, The application relates to a control module and a drive expansion unit.

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9. The educational development board of claim 1, wherein, The buzzer (9) is arranged on the substrate (1), the input end of the buzzer (9) is electrically connected to the second universal end of the control module (2), and the power supply end of the buzzer (9) is electrically connected to the second power supply end.

10. The educational development board of claim 1, wherein, The color lamp (10) is arranged on the substrate (1), the input end of the color lamp (10) is electrically connected to the third universal end of the control module (2), and the power supply end of the color lamp (10) is electrically connected to the second power supply end.

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