Portable circuit pocket practice box

Abstract

The utility model discloses a portable circuit pocket practice box, which is characterized in that a low-voltage component lap joint module, a high-voltage component lap joint module and a silicon controlled alternating current voltage regulation power supply module are modularly arranged in a first side cavity of a practice box body; a constant-current and constant-voltage circuit module, a positive and negative power supply module, a signal generator module, two groups of constant-voltage circuit modules, a battery box module and an external USB (Universal Serial Bus) power supply module are modularly mounted in the second side cavity; the low-voltage component lap joint module is provided with a non-polar capacitance area, a toggle switch area, an inductance area, a resistance area, a diode area, an LED area and a sliding variable resistance area, each module comprises an independent circuit design and multi-parameter-value components with adjustable parameters, and adjustment and output in each module are independently achieved. According to the portable circuit practice box, the problems that circuit element configuration of an existing portable circuit practice box is relatively fixed, the coupling degree between modules is high, the mutual dependence degree is large, accurate control and independent operation are difficult to achieve, and limitation to circuit experiments is large are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching equipment technical field, and specifically belongs to a portable circuit pocket practice box. BACKGROUND

[0002] In the prior art circuit practice box, a relatively fixed circuit design architecture is usually adopted. The functional modules of the internal circuit have high integration degree, and lack sufficient flexibility. For example, for some specific circuit experiment requirements, such as the generation of specific voltage, current output or specific waveform signal, the existing practice box often cannot meet these diversified requirements through simple adjustment. The reasons are as follows: first, the configuration of circuit elements in the existing practice box is relatively fixed, and the selection of element parameters is less, which limits its applicability in different experimental scenarios; second, the coupling degree between each functional module in the existing circuit practice box is high, and the degree of mutual dependence is large. When one of the functional modules is operated or adjusted, it often affects the normal work of other modules. This close coupling relationship makes it difficult to achieve precise control and independent operation of specific modules when conducting complex circuit experiments. For example, when adjusting the output parameters of the power module, it may cause signal distortion of the signal processing module connected thereto, thereby affecting the accuracy and reliability of the entire experiment. SUMMARY

[0003] The utility model provides a kind of portable circuit pocket practice box, to solve the circuit element configuration relatively fixed, the coupling degree between each functional module of existing circuit practice box is high, and the degree of mutual dependence is large, it is difficult to achieve the precise control and independent operation of specific module, the problem that circuit experiment is more limited.

[0004] To solve the above technical problems, the utility model provides a kind of portable circuit pocket practice box, comprising:

[0005] Practice box body, the practice box body includes first side cavity and second side cavity, the first side cavity is modularly installed low-voltage component joint module, high-voltage component joint module, silicon controlled rectifier ac voltage regulating power module, the second side cavity is modularly installed constant current constant voltage circuit module, positive and negative power module, signal generator module, two constant voltage circuit modules, battery box module and external USB power module;

[0006] The low-voltage component joint module, high-voltage component joint module, silicon controlled rectifier ac voltage regulating power module, constant current constant voltage circuit module, positive and negative power module, signal generator module, two constant voltage circuit modules, battery box module and external USB power module each contain independent circuit design and parameter-adjustable multi-parameter value component, and independently realize the adjustment and output in each module.

[0007] Preferably, the low-voltage component lapping module is used for independent lapping direct current circuits, and is respectively provided with multiple types of non-polarity capacitor area, toggle switch area, inductor area, resistor area, diode area, LED area and sliding variable resistor area.

[0008] Preferably, the constant current and constant voltage circuit module is provided with corresponding feedback mechanism circuit and regulation component, and outputs constant current source or constant voltage source.

[0009] Preferably, the signal generator module comprises an independent control circuit and corresponding components, the control circuit comprises multiple signal input and output ends, and comprises frequency adjustment and waveform duty cycle adjustment circuit, and the generated waveform at least comprises multiple types of sine wave, triangular wave and square wave.

[0010] Preferably, the constant voltage circuit module comprises an independent control circuit and corresponding parameter adjustable components, and further comprises three power input modes, namely external USB input, battery box input and output of another circuit board as power input, and the output voltage of the constant voltage circuit module is 1.25V-36V.

[0011] Preferably, the high-voltage component lapping module comprises multiple circuit modules, and at least comprises resistor area, capacitor area, diode area and connection socket area, and the adjustable components with different parameters are respectively arranged in the areas, and are used for lapping controllable alternating current circuits, and the high-voltage component lapping module further comprises empty banana socket for expanding circuit.

[0012] Preferably, the external USB power module is used for plugging on the constant voltage circuit module for power input.

[0013] Compared with the prior art, the utility model has the advantages that independent function modules are arranged by optimization, the function modules are independently arranged into plates and are provided with rich adjustable parameter components, and the flexibility and independence of the modules are greatly enhanced. This makes the modules be able to break away from the strong dependence relationship among each other, realizes accurate independent control, and reduces the limitation of circuit experiment. In experimental operation, the user can finely adjust the parameters of each module according to the demand, such as flexibly setting the resistance and capacitance value to meet different voltage, current and signal processing requirements, and does not interfere with the normal operation of other modules. This not only improves the accuracy and repeatability of the experiment, but also widens the boundary of the experiment, can complete more complex and diversified experimental projects, and can provide more efficient and more accurate experimental support for basic teaching experiment and professional scientific exploration, and powerfully promotes the development and application of circuit experiment technology. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor on the basis of these drawings.

[0015] Figure 1 is a structural schematic diagram of the embodiment;

[0016] Figure 2 is a low-voltage component joint module component layout diagram of the embodiment;

[0017] Figure 3 is a non-polar capacitor area circuit diagram of the low-voltage component joint module of the embodiment;

[0018] Figure 4 is a dial switch area circuit diagram of the low-voltage component joint module of the embodiment;

[0019] Figure 5 is an inductance area circuit diagram of the low-voltage component joint module of the embodiment;

[0020] Figure 6 is a resistance area circuit diagram of the low-voltage component joint module of the embodiment;

[0021] Figure 7 is a resistance diode area circuit diagram of the low-voltage component joint module of the embodiment;

[0022] Figure 8 is an LED diode area circuit diagram of the low-voltage component joint module of the embodiment;

[0023] Figure 9 is a sliding resistance area circuit diagram of the low-voltage component joint module of the embodiment

[0024] Figure 10 is a constant current constant voltage circuit module front component layout diagram of the embodiment;

[0025] Figure 11 is a constant current constant voltage circuit module back component layout diagram of the embodiment;

[0026] Figure 12 is a constant current constant voltage circuit module circuit board circuit diagram of the embodiment;

[0027] Figure 13 is a positive and negative power supply module component layout diagram of the embodiment;

[0028] Figure 14 is a positive and negative power supply module circuit board circuit diagram of the embodiment;

[0029] Figure 15 is the signal generating module component layout of the embodiment;

[0030] Figure 16 is the signal generating module circuit board circuit diagram of the embodiment;

[0031] Figure 17 is the constant voltage circuit module component layout of the embodiment;

[0032] Figure 18 is the constant voltage circuit module circuit board circuit diagram of the embodiment;

[0033] Figure 19 is the high-voltage component lapping module component layout of the embodiment;

[0034] Figure 20 is the high-voltage component lapping module circuit board circuit diagram of the embodiment;

[0035] Figure 21 is the front component layout of the external USB power supply module of the embodiment;

[0036] Figure 22 is the back component layout of the external USB power supply module of the embodiment;

[0037] Figure 23 is the circuit board circuit diagram of the external USB power supply module of the embodiment; DETAILED DESCRIPTION

[0038] The specific implementation of the utility model will be further described below in combination with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0039] As shown in Figure 1 , a portable circuit pocket practice box comprises a practice box body, the practice box body comprises a first side cavity and a second side cavity, a low-voltage component lapping module 1, a high-voltage component lapping module 5 and a silicon-controlled AC voltage regulating power supply module 6 are modularly installed in the first side cavity, a constant current constant voltage circuit module 2, a positive and negative power supply module 3, a signal generator module 4, two groups of constant voltage circuit modules 8 / 10, a battery box module 9 and an external USB power supply module 11 are modularly installed in the second side cavity;

[0040] The low-voltage component joint module 1, the high-voltage component joint module 5, the silicon-controlled AC voltage regulating power supply module 6, the constant current constant voltage circuit module 2, the positive and negative power supply module 3, the signal generator module 4, the two constant voltage circuit modules 8 / 10, the battery box module 9 and the external USB power supply module 11 each contain independent circuit design and parameter-adjustable multi-parameter value components, and independently realize the adjustment and output in each module.

[0041] As Figure 2 The low-voltage component joint module 1 is used for jointing a direct current circuit. The low-voltage component joint module 1 is divided into a non-polar capacitor area, a toggle switch area, an inductor area, a resistor area, a diode area, an LED area and a sliding variable resistor area. Figure 2The component layout of the low-voltage component lapping plate of the low-voltage component lapping module 1, wherein JP10-JP13 and JP18-JP19 are 6 banana socket areas, which contain 6 nickel-plated pure copper 2MM banana sockets in total; JP14-JP17 are 10 banana socket areas, which contain 10 nickel-plated pure copper 2MM banana sockets in total; J2-J7 and J13-J15 are 3 banana socket areas, which contain 3 nickel-plated pure copper 2MM banana sockets in total; J8-J12 are 2 banana socket areas, which contain 2 nickel-plated pure copper 2MM banana sockets in total; R28, R32 and R36 are 200-ohm resistors of type 1206; R29, R40 and R44 are 330-ohm resistors of type 1206; R33, R37 and R41 are 510-ohm resistors of type 1206; R45 is a 51-ohm resistor of type 1206; R30, R34 and R38 are 1K resistors of type 1206; R31, R42 and R46 are 5.1K resistors of type 0805; R35, R39 and R43 are 10K resistors of type 0805; R47 is a 100-ohm resistor of type 1206; R48 is a 200-ohm potentiometer of type 3296W; R49 is a 1K potentiometer of type 3296W; R50 is a 10K potentiometer of type 3296W; R51 is a 50K potentiometer of type 3296W; R52 is a 100K potentiometer of type 3296W; R53 is a 200K potentiometer of type 3296W; D14 is a 5mm white LED lamp; D15 is a 5mm red LED lamp; D16 is a 5mm green LED lamp; S3-S5 are 5MM toggle switches of type SS12F23; D11 is an IN4007 diode of type SOD-123; D12 is a 7.5V voltage stabilizing diode of type 1206; L1 is a 100uH I-shaped inductor of type PK0810; L3 is a 47uH I-shaped inductor of type PK0810; L5 is a 22uH I-shaped inductor of type PK0810; L2 is a 10uH I-shaped inductor of type PK0810; L4 is a 10mH I-shaped inductor of type PK0810; L6 is a 1mH I-shaped inductor of type PK0810.

[0042] Figure 3The circuit diagram of the non-polar capacitor area is as follows: one end of the non-polar capacitor C29 is connected with the pin 1 of the 6-banana socket area JP10, and the other end is connected with the pin 1 of the 6-banana socket area JP11; one end of the non-polar capacitor C30 is connected with the pin 4 of the 6-banana socket area JP10, and the other end is connected with the pin 4 of the 6-banana socket area JP11; one end of the non-polar capacitor C31 is connected with the pin 2 of the 6-banana socket area JP10, and the other end is connected with the pin 2 of the 6-banana socket area JP11; one end of the non-polar capacitor C32 is connected with the pin 5 of the 6-banana socket area JP10, and the other end is connected with the pin 5 of the 6-banana socket area JP11; one end of the non-polar capacitor C33 is connected with the pin 3 of the 6-banana socket area JP10, and the other end is connected with the pin 3 of the 6-banana socket area JP11; one end of the non-polar capacitor C34 is connected with the pin 6 of the 6-banana socket area JP10, and the other end is connected with the pin 6 of the 6-banana socket area JP11; one end of the non-polar capacitor C35 is connected with the pin 1 of the 6-banana socket area JP12, and the other end is connected with the pin 1 of the 6-banana socket area JP13; one end of the non-polar capacitor C36 is connected with the pin 4 of the 6-banana socket area JP12, and the other end is connected with the pin 4 of the 6-banana socket area JP13; one end of the non-polar capacitor C37 is connected with the pin 2 of the 6-banana socket area JP12, and the other end is connected with the pin 2 of the 6-banana socket area JP13; one end of the non-polar capacitor C38 is connected with the pin 5 of the 6-banana socket area JP12, and the other end is connected with the pin 5 of the 6-banana socket area JP13; one end of the non-polar capacitor C39 is connected with the pin 3 of the 6-banana socket area JP12, and the other end is connected with the pin 3 of the 6-banana socket area JP13; one end of the non-polar capacitor C40 is connected with the pin 6 of the 6-banana socket area JP12, and the other end is connected with the pin 6 of the 6-banana socket area JP13.

[0043] Figure 4 The circuit diagram of the toggle switch area is as follows: the pin 1 of the 3-banana socket area J13 is connected with the pin 1 of the toggle switch S3; the pin 2 of the 3-banana socket area J13 is connected with the pin 2 of the toggle switch S3, and the pin 3 of the 3-banana socket area J13 is connected with the pin 3 of the toggle switch S3; the pin 1 of the 3-banana socket area J14 is connected with the pin 1 of the toggle switch S2; the pin 2 of the 3-banana socket area J14 is connected with the pin 2 of the toggle switch S2, and the pin 3 of the 3-banana socket area J14 is connected with the pin 3 of the toggle switch S2; the pin 1 of the 3-banana socket area J15 is connected with the pin 1 of the toggle switch S1; the pin 2 of the 3-banana socket area J15 is connected with the pin 2 of the toggle switch S1, and the pin 3 of the 3-banana socket area J15 is connected with the pin 3 of the toggle switch S1.

[0044] Figure 5For the circuit diagram of the inductance area, specifically: one end of inductance L1 connects the pin 1 of 6 banana socket area JP18, the other end connects the pin 1 of 6 banana socket area JP19; one end of inductance L2 connects the pin 4 of 6 banana socket area JP18, the other end connects the pin 4 of 6 banana socket area JP19; one end of inductance L3 connects the pin 2 of 6 banana socket area JP18, the other end connects the pin 2 of 6 banana socket area JP19; one end of inductance L4 connects the pin 5 of 6 banana socket area JP18, the other end connects the pin 5 of 6 banana socket area JP19; one end of inductance L5 connects the pin 3 of 6 banana socket area JP18, the other end connects the pin 3 of 6 banana socket area JP19; one end of inductance L6 connects the pin 6 of 6 banana socket area JP18, the other end connects the pin 6 of 6 banana socket area JP19.

[0045] Figure 6The circuit diagram of the resistor region is as follows: one end of resistor R28 is connected with pin 1 of 10 banana socket region JP14, and the other end is connected with pin 1 of 10 banana socket region JP15; one end of resistor R29 is connected with pin 6 of 10 banana socket region JP14, and the other end is connected with pin 6 of 10 banana socket region JP15; one end of resistor R32 is connected with pin 2 of 10 banana socket region JP14, and the other end is connected with pin 2 of 10 banana socket region JP15; one end of resistor R33 is connected with pin 7 of 10 banana socket region JP14, and the other end is connected with pin 7 of 10 banana socket region JP15; one end of resistor R36 is connected with pin 3 of 10 banana socket region JP14, and the other end is connected with pin 3 of 10 banana socket region JP15; one end of resistor R37 is connected with pin 8 of 10 banana socket region JP14, and the other end is connected with pin 8 of 10 banana socket region JP15; one end of resistor R40 is connected with pin 4 of 10 banana socket region JP14, and the other end is connected with pin 4 of 10 banana socket region JP15; one end of resistor R41 is connected with pin 9 of 10 banana socket region JP14, and the other end is connected with pin 9 of 10 banana socket region JP15; one end of resistor R44 is connected with pin 5 of 10 banana socket region JP14, and the other end is connected with pin 5 of 10 banana socket region JP15; one end of resistor R45 is connected with pin 10 of 10 banana socket region JP14, and the other end is connected with pin 10 of 10 banana socket region JP15; one end of resistor R30 is connected with pin 1 of 10 banana socket region JP16, and the other end is connected with pin 1 of 10 banana socket region JP17; one end of resistor R31 is connected with pin 6 of 10 banana socket region JP16, and the other end is connected with pin 6 of 10 banana socket region JP17; one end of resistor R34 is connected with pin 2 of 10 banana socket region JP16, and the other end is connected with pin 2 of 10 banana socket region JP17; one end of resistor R35 is connected with pin 7 of 10 banana socket region JP16, and the other end is connected with pin 7 of 10 banana socket region JP17; one end of resistor R38 is connected with pin 3 of 10 banana socket region JP16, and the other end is connected with pin 3 of 10 banana socket region JP17; one end of resistor R39 is connected with pin 8 of 10 banana socket region JP16, and the other end is connected with pin 8 of 10 banana socket region JP17; one end of resistor R42 is connected with pin 4 of 10 banana socket region JP16, and the other end is connected with pin 4 of 10 banana socket region JP17; one end of resistor R43 is connected with pin 9 of 10 banana socket region JP16, and the other end is connected with pin 9 of 10 banana socket region JP17; one end of resistor R46 is connected with pin 5 of 10 banana socket region JP16, and the other end is connected with pin 5 of 10 banana socket region JP17; one end of resistor R47 is connected with pin 10 of 10 banana socket region JP16, and the other end is connected with pin 10 of 10 banana socket region JP17.

[0046] Figure 7For the diode section circuit diagram. Specifically: 2 banana plug area J8 pin 1 connects the positive of diode D11, pin 2 connects the negative of diode D11; 2 banana plug area J9 pin 1 connects the positive of diode D12, pin 2 connects the negative of diode D12.

[0047] Figure 8 For the LED section circuit diagram. Specifically: 2 banana plug area J10 pin 1 connects the positive of diode D14, pin 2 connects the negative of diode D14; 2 banana plug area J11 pin 1 connects the positive of diode D15, pin 2 connects the negative of diode D15; 2 banana plug area J12 pin 1 connects the positive of diode D16, pin 2 connects the negative of diode D16.

[0048] Figure 9 For the sliding resistance section circuit diagram. Specifically: 3 banana plug area J2 pin 1 connects the pin 3 of potentiometer R48, 3 banana plug area J2 pin 2 connects the pin 2 of potentiometer R48, 3 banana plug area J2 pin 3 connects the pin 1 of potentiometer R48; 3 banana plug area J3 pin 1 connects the pin 3 of potentiometer R49, 3 banana plug area J3 pin 2 connects the pin 2 of potentiometer R49, 3 banana plug area J3 pin 3 connects the pin 1 of potentiometer R49; 3 banana plug area J4 pin 1 connects the pin 3 of potentiometer R50, 3 banana plug area J4 pin 2 connects the pin 2 of potentiometer R50, 3 banana plug area J4 pin 3 connects the pin 1 of potentiometer R50; 3 banana plug area J5 pin 1 connects the pin 3 of potentiometer R51, 3 banana plug area J5 pin 2 connects the pin 2 of potentiometer R51, 3 banana plug area J5 pin 3 connects the pin 1 of potentiometer R51; 3 banana plug area J6 pin 1 connects the pin 3 of potentiometer R52, 3 banana plug area J6 pin 2 connects the pin 2 of potentiometer R52, 3 banana plug area J6 pin 3 connects the pin 1 of potentiometer R52; 3 banana plug area J7 pin 1 connects the pin 3 of potentiometer R53, 3 banana plug area J7 pin 2 connects the pin 2 of potentiometer R53, 3 banana plug area J7 pin 3 connects the pin 1 of potentiometer R53.

[0049] The low-voltage component joint module is provided with a carefully designed partition layout and a plurality of types and parameters of adjustable component configurations, so that the partition circuits are independently arranged, the coupling degree between the modules is greatly reduced, signal interference is avoided, and each module can realize precise independent operation and control. For example, the resistance area is provided with resistors with different resistance values, and the capacitor area is provided with capacitors with different capacitance values. Users can flexibly select components with appropriate parameters according to experimental requirements, easily build diversified circuit combinations, and complete various complex circuit experiments, thereby breaking through the limitations of traditional practice boxes due to fixed circuit component configurations, greatly widening the boundaries of circuit experiments, providing an efficient, stable and flexible platform for teaching, scientific research and electronic technology practice, and effectively promoting the innovation and development of circuit experiments, reducing the difficulty and complexity of experimental operation, and improving the accuracy and reliability of experimental results.

[0050] As shown in Figure 10 , 11 The front and back layouts of components of the constant-current constant-voltage circuit module 2 are shown in FIGS. 1 and 2. The constant-current constant-voltage circuit module 2 mainly provides a constant current source or a constant voltage source. The P1 terminal is an input terminal for supplying power to the board. The red LED diode D2 displays the mode of the circuit board, which is divided into constant voltage and constant current modes. When the current is constant, the lamp is on, and when the voltage is constant, the lamp is off. Specifically, P1 and P2 are 2 banana socket areas, which contain a total of 2 nickel-plated pure copper 2MM banana sockets; VR1 is an LM317 chip with a TO-92 type; C1 and C6 are aluminum electrolytic capacitors with a SMD type, a capacitance of 220uF and a voltage of 50V; C2, C3 and C7 are non-polar capacitors with a 0805 type, a capacitance of 0.1uF; C4 is a non-polar capacitor with a 0805 type, a capacitance of 1uF; C5 is a non-polar capacitor with a 0805 type, a capacitance of 1000PF; R1 is a 680-ohm resistor with a 0805 type; R2 is a 220-ohm resistor with a 0805 type; R3 is a 330-ohm resistor with a 0805 type; R4 is an 18K resistor with a 0805 type; R5 is a 100K resistor with a 0805 type; R6 is a 10K resistor with a 0805 type; R7 and R8 are 1K resistors with a 0805 type; R9 is a 0.5-ohm resistor with a 2512 type; CV is a 10K adjustable potentiometer with a WH148 type; CI is a 1K adjustable potentiometer with a WH148 type; U1 is an XL4015 chip with a TO-263-5 type; U2 is an LM358 chip with a SOP8 type; D1 is an SS34 Schottky diode with a SOD-123FL type; D2 is a red LED diode with a 0805 type; D3 is a blue LED diode with a 0805 type; and D4 is a green LED diode with a 0805 type.

[0051] As shown in Figure 12As shown, the pin 1 of the constant current constant voltage circuit banana socket area P1 of the constant current constant voltage circuit module 2 is connected to the positive pole of the aluminum electrolytic capacitor C1, and the pin 2 is grounded; one end of the aluminum electrolytic capacitor C1 and the non-polar capacitor C2 is connected to the pin 3 of the LM317 chip, and the other end is grounded; the pin 2 of the LM317 chip is connected to the power supply VCC, and the pin 1 is connected to one end of the resistor R1; the other end of the resistor R1 is grounded; one end of the resistor R2 is connected to the power supply VCC, and the other end is connected to the pin 1 of the LM317 chip; one end of the non-polar capacitor C3 is connected to the power supply VCC, and the other end is grounded; one end of the resistor R9 is grounded, and the other end is connected to the pin 6 of the LM358 chip; one end of the resistor R4 is connected to the power supply VCC, and the other end is connected to one end of the fixed end of the potentiometer CI, the other fixed end of the potentiometer CI is grounded, and the moving end of the potentiometer CI is connected to the pin 2 of the LM358 chip; one end of the resistor R5 is connected to the pin 2 of the LM358 chip, and the other end is connected to the pin 5 of the LM358 chip; one end of the resistor R6 is connected to the pin 5 of the LM358, and the other end is grounded; one end of the non-polar capacitor C5 is connected to the pin 2 of the LM358 chip, and the other end is connected to the pin 1 of the LM358 chip; the pin 8 of the LM358 chip is connected to the power supply VCC, the pin 4 is grounded, the pin 3 is connected to the pin 6, the pin 7 is connected to the negative pole of the blue LED diode D3, and the pin 1 is connected to the positive pole of the red LED diode; one end of the non-polar capacitor C4 is connected to the pin 5 of the chip XL4015, and the other end is connected to the pin 4 of the chip XL4015; the pin 1 of the chip 4015 is grounded, the pin 3 is connected to the negative pole of the Schottky diode SS34, and the pin 2 is connected to one end of the resistor R3; one end of the inductor L2 is connected to the negative pole of the Schottky diode SS34, and the other end is grounded; one end of the inductor L2 is connected to the pin 3 of the chip 4015, and the other end is connected to the pin 1 of the 2 banana socket area P2; one end of the resistor R3 is connected to the pin 1 of the 2 banana socket area P2, and the other end is grounded; one end of the resistor R3 is connected to the pin 1 of the 2 banana socket area P2, and the other end is connected to the pin 1 of the 2 banana socket area P2; the negative pole of the red LED diode is connected to the pin 2 of the chip XL4015, and the positive pole is connected to the pin 1 of the chip LM358; the positive pole of the aluminum electrolytic capacitor is connected to one end of the non-polar capacitor, and the other end is connected to the pin 1 of the 2 banana socket area P2, and the other end is grounded; the pin 2 of the 2 banana socket area P2 is connected to the pin 6 of the chip LM358; one end of the resistor R7 is connected to the power supply VCC, and the other end is connected to the positive pole of the blue LED diode D3, the negative pole of the blue LED diode D3 is connected to the positive pole of the green LED diode D4, the negative pole of the green LED diode D4 is connected to one end of the resistor R8, and the other end of the resistor R8 is grounded.

[0052] The constant current and constant voltage circuit board selects various specifications of resistors, capacitors, and precise voltage stabilizing chips and other components. The parameters of these components are matched to make the circuit highly adjustable. For example, by changing the resistance value of a specific resistor, the sensitivity of current feedback can be accurately adjusted, thereby achieving precise control of the output current; by using capacitors with different capacitance values, the noise in the voltage can be effectively filtered out, ensuring the stability of the output voltage. From the perspective of circuit design, independent and optimized constant current and constant voltage control circuit architectures are used to reduce the coupling degree between functional modules. The constant current circuit independently and accurately regulates the output current through high-precision current detection and feedback mechanisms, allowing it to maintain stable current output when the load changes without being affected by other circuit modules. The constant voltage circuit ensures that the output voltage is constant at the set value through stable voltage sampling and adjustment links, and works independently and cooperatively with the constant current circuit, meeting the needs of loads with high voltage stability requirements and providing accurate power supply in constant current situations. Users can easily achieve precise control and independent operation of the constant current and constant voltage module, greatly expanding the possibilities of circuit experiments. Whether it is for electronic device testing experiments that require stable power supply or circuit design experiments that have strict requirements for power supply characteristics, the module can provide reliable and accurate power support, significantly reducing the limitations of experiments and improving the efficiency and quality of experiments, providing strong support for electronic technology experiments and practical applications.

[0053] As Figure 13 shown, it is a component layout diagram of the positive and negative power supply module 3 for outputting positive and negative power supply. JP6 is the input end, and JP7 is the output end. JP6 is a 2-banana socket area, which contains a total of 2 nickel-plated pure copper 2MM banana sockets; JP7 is a 3-banana socket area, which contains a total of 3 nickel-plated pure copper 2MM banana sockets; U4 is a TDA2030 chip with a model of TO220-5; E1 and E3 are 100uF and 35V voltage-resistant direct-insertion aluminum electrolytic capacitors; E2 is a 10uF and 25V voltage-resistant direct-insertion aluminum electrolytic capacitor; C14 and C15 are non-polarity capacitors with a model of 0805 and a capacitance of 0.1uF. Figure 14The circuit board circuit diagram of the positive and negative power module 3 is as follows: the pin 2 of the 2-banana socket area JP6 is connected with the pin 3 of the 3-banana socket area JP7, the pin 1 of the 2-banana socket area JP6 is connected with the pin 1 of the 3-banana socket area JP7, the pin 2 of the 3-banana socket area JP7 is connected with the negative electrode of the aluminum electrolytic capacitor E1 and the positive electrode of the aluminum electrolytic capacitor E3, the positive electrode of the aluminum electrolytic capacitor E1 is connected with the pin 3 of the 3-banana socket area JP7 and one end of the non-polarity capacitor C14, the negative electrode of the aluminum electrolytic capacitor E3 is connected with the pin 1 of the 3-banana socket area JP7 and one end of the non-polarity capacitor C15, the other end of the capacitor C14 is connected with the other end of the capacitor C14; one end of the resistor R13 is connected with the pin 3 of the 3-banana socket area JP7, and the other end is connected with the pin 1 of the TDA2030 chip; the negative electrode of the polarity capacitor E2 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with the pin 1 of the 3-banana socket area JP7, the positive electrode of the polarity capacitor E2 is connected with one end of the resistor R16, the other end of the resistor R16 is connected with the pin 2 of the TDA2030 chip and one end of the resistor R15, the other end of the resistor R15 is connected with the pin 4 of the TDA2030 chip and grounded, and the pin 3 of the TDA2030 chip is connected with the pin 1 of the 3-banana socket area JP7.

[0054] Figure 15The layout diagram of components of the signal generator module 4 is shown in Figure 6. The signal generator module 4 is used to generate sine wave, triangle wave and square wave. JP8 is the input terminal, JP9 is the waveform output terminal, potentiometer CV1 is used to adjust the peak of the waveform, CV2 is used to adjust the trough of the waveform, CV3 is used to adjust the duty cycle of the waveform, and CV4 is used to adjust the frequency of the waveform. Specifically, JP8 is a 3-banana socket area, which contains a total of 3 nickel-plated pure copper 2MM banana sockets; JP9 is a 4-banana socket area, which contains a total of 4 nickel-plated pure copper 2MM banana sockets; J1 is a 6P double-row female header; E4 and E5 are non-polar capacitors of 1206 type and 10uF; C16-C19 and C26-C28 are non-polar capacitors of 0805 type and 0.1uF; C20 is a non-polar capacitor of 0805 type and 3.3uF; C21 is a non-polar capacitor of 0805 type and 0.33uF; C22 is a non-polar capacitor of 0805 type and 0.033uF; C23 is a non-polar capacitor of 0805 type and 3300pF; C24 is a non-polar capacitor of 0805 type and 330pF; C25 is a non-polar capacitor of 0805 type and 22pF; R17 and R18 are resistors of 0805 type and 1K; R19 and R20 are resistors of 0805 type and 2.2K; R21 is a resistor of 0805 type and 0 ohm; R22 and R23 are resistors of 0805 type and 10K; R24 and R25 are resistors of 0805 type and 4.7K; R26 and R27 are resistors of 0805 type and 0 ohm; D9 is a red LED diode of 0805 type; D10 is a green LED diode of 0805 type; CV1-CV4 are potentiometers of 3296W type and 10K; U5 is a DIP14 straight pin chip ICL8038. Figure 16The circuit diagram of the signal generator circuit board, 3 banana plug area JP8 pin 1 and the positive pole of the aluminum electrolytic capacitor E3, non-polar capacitor C16 and C17 one end and the power supply VDD, the negative pole of the aluminum electrolytic capacitor E3, non-polar capacitor C16 and C17 the other end is grounded; 3 banana plug area JP8 pin 2 is grounded; 3 banana plug area JP8 pin 3 and the power supply VEE, the positive pole of the aluminum electrolytic capacitor E5, non-polar capacitor C18 and C19 one end and the power supply VEE, the negative pole of the aluminum electrolytic capacitor E5, non-polar capacitor C18 and C19 the other end is grounded; one end of resistor R17 and R18 is connected to the power supply VDD, the other end is connected to the non-moving end of the potentiometer CV1 and CV2, the other non-moving end of the potentiometer CV1 and CV2 is connected to the power supply VEE, the moving end of the potentiometer CV1 is connected to the pin 1 of the chip ICL8038, and the potentiometer CV2 is connected to the pin 12 of the chip ICL8038; one end of the resistor R27 is connected to the pin 2 of the 4 banana plug area JP9, and the other end is connected to the pin 2 of the chip ICL8038; one end of the resistor R26 is connected to the pin 3 of the 4 banana plug area JP9, and the other end is connected to the pin 3 of the chip ICL8038; the moving end of the potentiometer CV3 is connected to the power supply VDD, the non-moving end is connected to one end of the resistor R24, and the other non-moving end is connected to one end of the resistor R25; the other end of the resistor R25 is connected to the pin 4 of the chip ICL8038, and the other end of the resistor R24 is connected to the pin 5 of the chip ICL8038; one end of the non-polar capacitor C28 is connected to the power supply VDD and the pin 6 of the chip ICL8038, and the other end is grounded; one end of the non-polar capacitor C26 is connected to the power supply VEE, and the other end is grounded; one end of the resistor R23 is grounded, and the other end is connected to the non-moving end of the potentiometer CV4, the other non-moving end CV4 is connected to the power supply VDD and one end of the non-polar capacitor C27, and the moving end of the potentiometer CV4 is connected to the other end of the non-polar capacitor C27; one end of the resistor R22 is connected to the pin 9 of the ICL8038 and one end of the resistor R21, and the other end is connected to the power supply VDD, the other end of the resistor R21 is connected to the pin 4 of the 4 banana plug area JP9, and the pin 1 of the 4 banana plug area JP9 is grounded; the pin 10 of the chip ICL8038 is connected to the pins 1, 3, 5, 7, 9 and 11 of the 6P double-row female header; one end of the non-polar capacitor C20 is connected to the pin 2 of the 6P double-row female header J1, and the other end is grounded; one end of the non-polar capacitor C21 is connected to the pin 4 of the 6P double-row female header J1, and the other end is grounded; one end of the non-polar capacitor C22 is connected to the pin 6 of the 6P double-row female header J1, and the other end is grounded; one end of the non-polar capacitor C23 is connected to the pin 8 of the 6P double-row female header J1, and the other end is grounded; one end of the non-polar capacitor C24 is connected to the pin 10 of the 6P double-row female header J1, and the other end is grounded; one end of the non-polar capacitor C25 is connected to the pin 12 of the 6P double-row female header J1, and the other end is grounded.

[0055] As Figure 17As shown, the component layout diagram of the constant voltage circuit module 4, the constant voltage circuit module 4 is divided into three power input modes, respectively, external USB input, battery box input and output of another circuit board as power input, wherein JP3 is the output terminal, JP1 terminal is the battery box input, JP2 is the output of another circuit board as power input, JP4 and JP5 are external USB power input, S2 is used for controlling the switch of input mode, S1 is the output control switch. The constant voltage circuit board of the constant voltage circuit module 4 is mainly used for outputting 1.25V-36V DC voltage, JP1 is the XH2.54 wiring terminal with model YX-XH2; P3 is a 1 banana socket area, which contains a total of 1 nickel-plated pure copper 2MM banana socket; JP2 and JP3 are 2 banana socket areas, which contain a total of 2 nickel-plated pure copper 2MM banana sockets; JP4 and JP5 are 5P single-row female seat of 2.54mm; F1 is an 8V 2A fuse with model 1206; S1 is a two-gear switch with model MTS-103; S2 is a three-gear switch with model MTS-103; D5 is a red LED diode with model 0805; D6 is an SS34 diode with model SMB; D7 is an M4 diode with model SMA; D8 is a green LED diode with model 0805; C8 and C11 are aluminum electrolytic capacitors with model SMD, 220uF and voltage resistance 35V; C9 and C12 are non-polarity capacitors with model 0805, 1uF; C10 and C13 are non-polarity capacitors with model 1206, 22uF; RP1 is a 10K adjustable potentiometer with model WH148; T1 and T2 are 33uH inductors with model CDRH74R; T3 is a 2.2uH inductor with model 0630; U3 is an XL6009 chip with model TO-263-5; R10 and R12 are 1K resistors with model 0805; R11 is a 330-ohm resistor with model 0805. Figure 18The circuit diagram for the constant voltage circuit board shows the following: Pin 2 of terminal JP1 is connected to pin 1 of DIP switch S2, and the other pin is grounded; Pin 1 of terminal JP1 is connected to power supply VCC, and the other pin is grounded; one end of resistor R10 is connected to power supply VCC, and the other end is connected to the positive terminal of the red LED, with the negative terminal of the red LED grounded; one end of fuse F1 is connected to power supply VCC, and the other end is connected to pin 2 of DIP switch S2, with pin 3 of the DIP switch connected to 5V power supply; pin 5 of 5P single-row female connectors JP4 and JP5 is connected to 5V power supply, and pin 1 is grounded; pin 1 of DIP switch S1 is connected to VCC power supply, pin 2 is connected to VCC-OUT power supply, and pin 3 is connected to pin 1 of the banana plug area; the negative terminal of diode D7 is connected to VCC-OUT power supply, and the positive terminal is grounded; the positive terminal of aluminum electrolytic capacitor C8 and one end of non-polarized capacitor C9 are connected to VCC-OUT power supply, and the other end is grounded; pin 4 of chip U3 is connected to one end of inductor T2 and connected in parallel. Connect to VCC-OUT power supply. Pin 3 connects to the other end of inductor T2 and one end of non-polarized capacitor C10. Pin 5 connects to one end of resistor R11, and pin 1 is grounded. One stationary end of potentiometer RP1 is connected to the moving end and connected to one end of resistor R11. The other moving end is connected to the negative terminal of diode D6. One end of resistor R11 is connected to the moving end of potentiometer RP1, and the other end is grounded. One end of inductor is grounded, and the other end is connected to one end of capacitor C10 and the positive terminal of diode D6. The positive terminal of aluminum electrolytic capacitor C11 and non-polarized capacitor C12 are connected to one end of inductor T3, and the other end is grounded. The other end of inductor T3 is connected to pin 1 of JP3 (2-banana socket area), and pin 2 of JP3 (2-banana socket area) is grounded. One end of non-polarized capacitor C13 is connected to pin 1 of JP3 (2-banana socket area), and the other end is grounded. Resistor R12 is connected to pin 1 of JP3 (2-banana socket area), and the other end is connected to the positive terminal of green LED diode D8. The negative terminal of green LED diode is grounded.

[0056] according to Figure 17 and 18 The circuit diagram and component layout are provided. Each constant voltage circuit module (8 / 10) is equipped with multi-parameter capacitors, resistors, voltage regulator chips, and other components, achieving precise voltage regulation through reasonable circuit connections. Capacitors are used for filtering, reducing voltage fluctuations and noise; combinations of capacitors with different capacitance values ​​can handle interference of different frequencies. Resistors participate in voltage division and current limiting; by adjusting the resistor value, the magnitude and stability range of the output voltage can be precisely set. The voltage regulator chip is the core component, ensuring that the output voltage remains stable near the set value under various load conditions.

[0057] It should be noted that two constant voltage circuit modules 8 / 10 are provided in the embodiment, on the one hand, based on the consideration of redundancy backup. In a complex experimental environment or actual application, if one constant voltage circuit module fails, the other can immediately take over the work to ensure the voltage stability of the entire circuit system is not affected, greatly improving the reliability of the system. For example, in the electronic device test experiment with extremely high voltage stability requirements, such as the power supply test of precision instruments and meters, once the main constant voltage module fails, the backup module can seamlessly connect, avoiding damage to the equipment or loss of experimental data due to voltage interruption. On the other hand, in order to realize load sharing and flexible configuration. Different experiments or circuit modules may have different load requirements and voltage accuracy requirements for constant voltage power supply. Two constant voltage modules can bear different loads and be optimized according to specific requirements. For example, for analog signal processing circuits with strict voltage ripple requirements, a constant voltage module with high precision voltage stabilization and low ripple output characteristics can be used for power supply; while for digital circuits with relatively low voltage accuracy requirements but large load current, another constant voltage module with large current output capability is responsible, so that the power distribution of the entire circuit system is more reasonable and efficient, and the overall performance and adaptability of the system are improved.

[0058] The arrangement and circuit design of the components of the two modules not only ensure their independence and stability, but also enable them to work cooperatively and switch flexibly at the system level. In the normal working state, according to the preset load distribution strategy, each module provides stable voltage for the corresponding circuit part; when abnormal conditions occur, such as excessive load or failure of a module, the system can automatically detect and switch or adjust to ensure the normal operation of the entire circuit system, effectively solving the problem of high coupling degree of functional modules in existing practice boxes, difficult to control and operate independently, greatly expanding the possibility and reliability of circuit experiments and practical applications.

[0059] Figure 19The component layout diagram of the high-voltage component clamping module 5 is used for clamping an alternating current circuit and is provided with empty banana sockets, facilitating the expansion of other circuits in the later period. Specifically, JP20 and JP21 are 10 banana socket areas, which contain a total of 10 nickel-plated pure copper 2MM banana sockets; JP28 and JP29 are 8 banana socket areas, which contain a total of 8 nickel-plated pure copper 2MM banana sockets; JP25 and JP27 are 5 banana socket areas, which contain a total of 5 nickel-plated pure copper 2MM banana sockets; JP26 is a 7 banana socket area, which contains a total of 7 nickel-plated pure copper 2MM banana sockets; JP30-JP39 are 9 banana socket areas, which contain a total of 9 nickel-plated pure copper 2MM banana sockets; JP22-JP24 are 2 banana socket areas, which contain a total of 2 nickel-plated pure copper 2MM banana sockets; R54 and R56 are 10K resistors of type 0805; R58 and R60 are 39K resistors of type 0805; R55 and R62 are 47K resistors of type 0805; R57 and R59 are 100K resistors of type 0805; R61 and R63 are 390K resistors of type 0805; C42 is a 1uf and 400V voltage-resistant CBB capacitor; C43 is a 2.2uf and 400V voltage-resistant CBB capacitor; C44 is a 4.7uf and 400V voltage-resistant CBB capacitor. Figure 20The circuit board circuit diagram for the high-voltage element lapping module is as follows: one end of resistor R54 is connected to pin 1 of 10-banana socket area JP20, and the other end is connected to pin 1 of 10-banana socket area JP21; one end of resistor R55 is connected to pin 6 of 10-banana socket area JP20, and the other end is connected to pin 6 of 10-banana socket area JP21; one end of resistor R56 is connected to pin 2 of 10-banana socket area JP20, and the other end is connected to pin 2 of 10-banana socket area JP21; one end of resistor R57 is connected to pin 7 of 10-banana socket area JP20, and the other end is connected to pin 7 of 10-banana socket area JP21; one end of resistor R58 is connected to pin 3 of 10-banana socket area JP20, and the other end is connected to pin 3 of 10-banana socket area JP21; one end of resistor R59 is connected to pin 8 of 10-banana socket area JP20, and the other end is connected to pin 8 of 10-banana socket area JP21; one end of resistor R60 is connected to pin 4 of 10-banana socket area JP20, and the other end is connected to pin 4 of 10-banana socket area JP21; one end of resistor R61 is connected to pin 9 of 10-banana socket area JP20, and the other end is connected to pin 9 of 10-banana socket area JP21; one end of resistor R62 is connected to pin 5 of 10-banana socket area JP20, and the other end is connected to pin 5 of 10-banana socket area JP21; one end of resistor R63 is connected to pin 10 of 10-banana socket area JP20, and the other end is connected to pin 10 of 10-banana socket area JP21; one end of capacitor C41 is connected to pin 1 of 2-banana socket area JP22, and the other end is connected to pin 2 of 2-banana socket area JP22; one end of capacitor C42 is connected to pin 1 of 2-banana socket area JP23, and the other end is connected to pin 2 of 2-banana socket area JP22; one end of capacitor C43 is connected to pin 1 of 2-banana socket area JP24, and the other end is connected to pin 2 of 2-banana socket area JP22; pins 1-8 of 8-banana socket area JP28 are connected as VCC power supply output terminals, and pins 1-8 of 8-banana socket area JP29 are connected as ground output terminals; JP30-JP39 are 9-banana socket areas, JP25 and JP27 are 5-banana socket areas, and JP26 is a 7-banana socket area, which are used for lapping circuits.

[0060] The high-voltage component lapping module 5 is designed by reasonably dividing the areas, such as the resistance area, the capacitor area, the diode area, and the connection socket area, to realize the relative independence of each part of the circuit. This partition structure effectively reduces the coupling degree between modules, making the operation and control of components in a specific area more accurate and independent. For example, a variety of resistance values and voltage levels of resistors are equipped in the resistance area. These resistors can independently participate in the voltage division and current limiting of the high-voltage circuit. Experimenters can accurately select the appropriate resistance value according to the specific high-voltage experimental requirements without interfering with the circuit functions of other areas, which is difficult to achieve in traditional practice boxes. From the selection and configuration of components, for high-voltage application scenarios, components such as capacitors and diodes with required voltage resistance values are selected. Capacitors can stably perform functions such as filtering and energy storage in a high-voltage environment. Capacitors with different capacitance values can flexibly adjust the time constant and voltage stability of the circuit, effectively filter out noise and sharp pulses in the high-voltage power supply, and ensure the smoothness and stability of the output high-voltage. Diodes play a key role in rectification and protection due to their unidirectional conductivity, preventing high-voltage reverse breakdown from damaging the circuit and providing the correct current path for high-voltage signal processing. The design of the connection socket area further enhances the practicality and flexibility of the module. Through standardized socket interfaces, external high-voltage power supplies, loads, and other experimental modules can be easily connected, enabling diverse high-voltage circuit construction. Whether it is to build a simple high-voltage rectification and filtering circuit or a complex high-voltage inverter and pulse modulation circuit, the connection and configuration of components can be quickly and accurately completed, greatly expanding the range and possibilities of high-voltage circuit experiments and effectively addressing the limitations of traditional practice boxes on circuit experiments. This provides an efficient, reliable, and easy-to-operate experimental platform for high-voltage electronic technology teaching, research, and practical application.

[0061] Figure 21 and 22 The layout of the front and back of the external USB power module 11 is shown in the figure. The external USB power module 11 is mainly used for plugging into the constant voltage circuit board 8 / 10 for power input. Specifically: USB1 is a Type-c female head with a model of USB_TYPE-C-6P; JP40 and JP41 are 5P single-row female sockets with a pitch of 2.54mm, and R64-R73 are 10-ohm resistors with a model of 0805. Figure 23 The circuit diagram of the external USB power module circuit board is shown in the figure. The GND pin of the Type-c female head is connected to ground, and the VBUS pin is connected to the VCC power supply. The pin 1 of JP40 and JP41 is connected to the VCC power supply, and the pin 5 is connected to ground. One end of the resistors R64-R73 is connected to the VCC power supply, and the other end is connected to ground.

[0062] The embodiment can use the portable instrument to conveniently perform some experiments in circuit course teaching in multiple scenes, such as verification of voltage and current Kirchhoff's law, verification of superposition theorem, equivalent transformation of voltage source and current source, RC first-order circuit, research on phasor of sinusoidal steady-state alternating current circuit, and the like

[0063] For example, when verifying voltage and current Kirchhoff's law, the constant-voltage circuit board 8 and the constant-voltage circuit board 10 and the resistance area of the low-voltage component connecting board 1 are connected by using special wires, and the students need to use a multimeter to measure the voltage data of each point and the current data of each branch to verify the voltage and current Kirchhoff's law.

[0064] When performing the equivalent transformation experiment of the voltage source and the current source, the constant-voltage constant-current circuit board 2 and the resistance area of the low-voltage component connecting board 1 are needed to be connected by using special wires, and the constant-current mode of the constant-voltage constant-current circuit board is used to connect the circuit and measure the current and voltage at the corresponding position by using a multimeter. Next, the constant-voltage mode is switched to again connect the circuit, and the current and voltage at the corresponding position are measured by using a multimeter. Finally, the values obtained in the two modes are compared and analyzed comprehensively and deeply, and the principle of the equivalent transformation of the voltage source and the current source is effectively verified.

[0065] When performing the superposition theorem verification experiment, the constant-voltage circuit board 8 and the constant-voltage circuit board 10 and the resistance area, the single-pole double-throw switch area and the diode area of the low-voltage component connecting board 1 are needed to be connected by using special wires. The power supply and the resistance output by the two constant-voltage circuit boards and the toggle switch are connected to the circuit. First, the linear superposition theorem is measured, the current of each branch and the voltage across each resistance element are measured by using a multimeter when the power supply output by the constant-voltage circuit board 8 acts alone, then the current of each branch and the voltage across each resistance element are measured by using a multimeter when the power supply output by the constant-voltage circuit board 10 acts alone, and finally, the data measured three times are compared to verify the linear superposition theorem. Then, the diode in the low-voltage component connecting board 1 is connected to the connected circuit, and the steps of measuring the linear superposition theorem are repeated to measure the non-linear superposition theorem.

[0066] When performing the RC first-order circuit experiment, the constant-voltage circuit board 8, the resistance area and the non-polarity capacitor area of the low-voltage component connecting board 1, the positive and negative power supply board 3 and the signal generator 4 are needed to be used. First, the constant-voltage circuit board 1 outputs the power supply to the positive and negative power supply board, then the positive and negative power supply board provides the positive and negative power supply for the signal generator to output the waveform. Then, the resistance and the capacitor are connected to the circuit, finally, a square wave signal is given to the connected circuit, and the waveforms on both sides of the resistance are observed by using an oscilloscope to compare the difference between the input signal and the resistance output, and the RC first-order principle is verified.

[0067] In the study of the sinusoidal steady-state alternating current phasor, the controllable silicon AC voltage regulating power supply 6 and the capacitor and resistor joint circuit of the high-voltage circuit board are needed to be used, and the voltage values of each point and the current values of each branch are measured by the AC block of the multimeter. By changing the resistance, it is verified whether the resistance voltage, the capacitor voltage and the input voltage can form a right-angle voltage triangle, and when the resistance value changes, the phase angle will also change.

[0068] The utility model discloses a through the optimization setting independent function module, and the function module is independent into the board and is equipped with abundant adjustable parameter element, and the flexibility and independence of module are greatly enhanced. This makes each module be able to get rid of the strong interdependent relationship, realizes accurate independent control, thereby reduces the limitation of circuit experiment. In the experimental operation, the user can fine adjustment according to the demand of the parameter of each module, such as the flexible setting resistance, capacitance value to satisfy different voltage, current and signal processing demand, and will not interfere with the normal operation of other modules. This not only improves the accuracy and repeatability of experiment, but also widens the boundary of experiment, can complete more complex and diversified experimental project, whether it is basic teaching experiment or professional scientific research exploration, can provide more efficient, more accurate experimental support, powerfully promotes the development and application of circuit experiment technology.

[0069] The utility model discloses not limited to the implementation mode discussed above. The above description of the specific implementation mode is for the purpose of describing and explaining the technical scheme involved in the utility model. The obvious transformation or substitution based on the utility model should be considered to fall into the protection scope of the utility model. The above specific implementation mode is used to disclose the best implementation method of the utility model, so that the ordinary skilled in the art can apply various implementation modes and various alternative modes of the utility model to achieve the purpose of the utility model.

Claims

1. A portable circuit pocket practice case characterized by, The utility model relates to a practice box, comprising: The practice box comprises a first side cavity and a second side cavity, a low-voltage component joint module, a high-voltage component joint module and a silicon controlled AC voltage regulating power supply module are modularly installed in the first side cavity, and a constant current constant voltage circuit module, a positive and negative power supply module, a signal generator module, two constant voltage circuit modules, a battery box module and an external USB power supply module are modularly installed in the second side cavity; The low-voltage component joint module, the high-voltage component joint module, the silicon controlled AC voltage regulating power supply module, the constant current constant voltage circuit module, the positive and negative power supply module, the signal generator module, the two constant voltage circuit modules, the battery box module and the external USB power supply module each comprise an independent circuit design and a plurality of parameter value components with adjustable parameters, and adjustment and output in each module are independently realized.

2. A portable circuit pocket practice box according to claim 1, wherein The low-voltage component joint module is used for independently jointing a direct current circuit and is provided with a plurality of non-polar capacitor areas, toggle switch areas, inductance areas, resistance areas, diode areas, LED areas and sliding resistance areas, and a plurality of parameter value components with adjustable parameters are arranged in each area on a power supply base plate.

3. A portable circuit pocket practice box according to claim 1, wherein The constant current constant voltage circuit module is provided with a corresponding feedback mechanism circuit and a control component, and outputs a constant current source or a constant voltage source.

4. The portable circuit pocket practice kit of claim 1, wherein, The signal generator module comprises an independent control circuit and corresponding components, the control circuit comprises a plurality of signal input and output terminals and frequency adjustment and waveform duty cycle adjustment circuits, and the generated waveforms include sine waves, triangular waves and square waves.

5. The portable circuit pocket practice kit of claim 1, wherein, The constant voltage circuit module comprises an independent control circuit, corresponding parameter adjustable components and three power input modes, namely external USB input, battery box input and output of another circuit board as power input, and the output voltage of the constant voltage circuit module is 1.25V-36V.

6. A portable circuit pocket practice box according to claim 1, wherein The high-voltage component joint module comprises a plurality of circuit modules, at least including resistance areas, capacitor areas, diode areas and connection socket areas, and the areas are respectively provided with adjustable components with different parameters, which are used for jointing an adjustable alternating current circuit, and the high-voltage component joint module further comprises a vacant banana socket for expanding the circuit.

7. A portable circuit pocket practice box according to claim 1, wherein The external USB power supply module is used for plugging on the constant voltage circuit module for power input.

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