CN217214005U - Be applied to student's study electronic circuit's of vocational colleges and universities laboratory experiment board - Google Patents

Abstract

The utility model discloses an experimental board applied to student's study electronic circuit of vocational colleges, including the individual layer PCB base plate, the front of individual layer PCB base plate is provided with a plurality of mutually independent circuit districts, and the circuit in each circuit district sets up in the front of individual layer PCB base plate with visible form, is provided with the component pad that is used for welding functional electronic component and peripheral electronic component on the circuit of circuit district, and is used for measuring the test point of functional electronic component and/or peripheral electronic component welding effect, and peripheral electronic component is including the LED banks that is used for showing functional electronic component operating condition; the LED lamp group consists of a plurality of LED lamp beads which are arranged in a pattern with an indicating effect. The beneficial effects of the utility model reside in that the student of being convenient for can look over each electronic component's relation of connection more directly perceived clearly, study and understand all kinds of electronic component's function.

Description

Be applied to student's study electronic circuit's of vocational colleges and universities laboratory experiment board

Technical Field

The utility model relates to the technical field of teaching aid especially relates to a be applied to student's study electronic circuit's of vocational study experiment board.

Background

In the teaching process of electronic circuits, it is the most basic teaching requirement to let students know and master the functions of various basic electronic elements. At present, most of experimental boards in the market are hole boards or circuit boards welded with electronic elements, the hole boards or the circuit boards need to be connected by a college according to a circuit diagram in the using process, time and labor are wasted, and many uncertain factors exist in the experimental process, so that the failure of the experiment is easily caused; the latter also need to use the wire guide component to connect, and the misclassification of lines leads to easily that the connection process can not clear geography along the route trend, not only makes mistakes easily but also is unfavorable for student's understanding and study.

In addition, the above-mentioned two types of test panels are not provided with indicator lamps, i.e., measurement points, and thus cannot be verified.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be applied to student's study electronic circuit's of vocational colleges and universities experimental board for solve above-mentioned technical problem.

The technical scheme of the utility model as follows:

an experimental board applied to electronic circuit learning of students in vocational colleges comprises a single-layer PCB substrate, wherein the front surface of the single-layer PCB substrate is provided with a plurality of mutually independent circuit areas, a circuit in each circuit area is arranged on the front surface of the single-layer PCB substrate in a visible mode, a component bonding pad for welding a functional electronic component and a peripheral electronic component and a test point for measuring the welding effect of the functional electronic component and/or the peripheral electronic component are arranged on the circuit of each circuit area, and the peripheral electronic component comprises an LED lamp group for displaying the working state of the functional electronic component; the LED lamp group is composed of a plurality of LED lamp beads and is arranged in a pattern with an indicating effect.

Optionally, the pattern comprises an arrow pattern, a ring pattern, a vertical bar pattern, a fork pattern, a hook pattern.

Optionally, a switch pad for soldering a switch is disposed on a line of each of the line areas.

The beneficial effects of the utility model reside in that:

(1) the single-layer PCB is used as the substrate, the front surface of the substrate is provided with a plurality of mutually independent circuit areas, and the circuits of the circuit areas are arranged on the front surface of the single-layer PCB in a visible mode, so that students can more intuitively and clearly check how each electronic element is connected, and the students can conveniently learn, understand and master the connection relation between the electronic elements;

(2) the widened element pad positions and the widened test point positions are arranged on the lines of the line area, so that manual welding of students is facilitated, the condition of poor welding is known through the test point positions, correction is timely performed, and the students can learn and record experimental data conveniently;

(3) a modular structure is formed by arranging a plurality of independent circuit areas, so that functional experimental circuits of a plurality of different functional electronic elements are arranged on the same substrate, and the unit-by-unit learning of students is facilitated;

(4) through set up the switch pad that is used for welding the switch in each circuit district to the student carries out independent on-off control through the switch of welding on the switch pad to the function test circuit in this circuit district, is convenient for divide module study and operation.

Drawings

Fig. 1 is the utility model provides a front PCB layout schematic diagram of experiment board.

Fig. 2 is a circuit diagram of a diode function experimental circuit.

Fig. 3 is a circuit diagram of a resistance and triode function experimental circuit.

Fig. 4 is a circuit diagram of a crystal oscillator, a capacitor, an MOS transistor, a three-terminal regulator and a frequency-dividing IC function experimental circuit.

Fig. 5 is a circuit diagram of an experimental circuit for a sound collection (AD conversion) function.

Fig. 6 is a circuit diagram of an experimental circuit of the dimming circuit of the intelligent desk lamp.

FIG. 7 is a circuit diagram of a WF100SPZ surface pressure sensor test circuit.

Fig. 8 is a circuit diagram of an optical coupler, a relay and a triode function experimental circuit.

Fig. 9 is a circuit diagram of a functional experimental circuit of a binaural speaker.

Fig. 10 is a circuit diagram of a function test circuit of the timer circuit.

Fig. 11 is a schematic diagram of a front PCB layout corresponding to the functional experimental circuit of the crystal oscillator, the capacitor, the MOS transistor, the three-terminal regulator and the frequency-dividing IC.

Fig. 12 is a schematic diagram of a front PCB layout corresponding to an experimental circuit for a sound collection (AD conversion) function.

Fig. 13 is a schematic diagram of a front PCB layout corresponding to the experimental circuit of the dimming circuit of the intelligent desk lamp.

FIG. 14 is a front PCB layout diagram corresponding to the WF100SPZ surface pressure sensor test circuit.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model provides a be applied to student's study electronic circuit's of vocational colleges experimental board, including individual layer PCB base plate, the front of individual layer PCB base plate is provided with a plurality of heterogeneous mutually independent circuit districts, and the circuit in every circuit district sets up the front at individual layer PCB base plate with visible form, is provided with the component pad that is used for welding function electronic component and peripheral electronic component on the circuit in circuit district, is used for measuring test data's test point and is used for welding switch's switch pad.

The peripheral electronic element comprises an LED lamp group for displaying the working state of the functional electronic element; the LED lamp group consists of a plurality of LED lamp beads and is arranged into patterns with indicating effects, such as arrow patterns, annular patterns, vertical bar patterns, fork patterns, hook patterns and the like.

This is explained in detail below with reference to the test plate shown in FIG. 1.

As shown in fig. 1, the front of this individual layer PCB base plate sets up 10 independent circuit areas, is located the circuit area of first layer and is provided with power supply and DC step-down experiment circuit diagram, and after the student welded electronic component and switch, the LED lamp that will correspond on the pad of this circuit diagram, formed power supply and DC step-down experiment circuit for whole experiment board provides the power supply, is the source of whole experiment board power supply. The circuit comprises main electronic elements such as a fuse, a three-terminal voltage stabilizer, a capacitor and the like, and is also a power supply mode commonly adopted by products such as household appliances, wireless communication equipment, microcomputers and the like. When each function test circuit is tested, the switch SW1 is closed, 5V voltage can be detected at the detection point TP2, the indicator light LED1 can emit light, and the whole test board is powered on to supply power for each subsequent function test circuit.

The second layer has 3 circuit areas, from left to right in proper order is diode function experimental circuit, resistance and triode function experimental circuit and crystal oscillator, electric capacity, MOS pipe, three-terminal steady voltage and frequency division IC function experimental circuit.

The diode function experiment circuit is a functional module developed and designed for verifying the working principle of the diode, the function of the diode and the characteristics of the diode. As shown in fig. 2, the diode function experiment circuit includes electronic elements such as a single diode D1 and a composite diode D2, and is also a power supply isolation protection mode commonly used for products such as household appliances, wireless communication devices, and microcomputers. In the experiment, when the switches SW6, SW7, SW8 and SW9 are closed, the corresponding LEDs 21, LED7, LED8 and LED6 are lighted.

The resistor and triode function experimental circuit is a function experimental circuit developed and designed for verifying the working principle, function and characteristics of the resistor and the triode. As shown in fig. 3, the experimental circuit for the functions of the resistor and the transistor includes adjustable resistors R3, R5, R11, a photo resistor GR1, a thermistor NTR, a transistor Q18 and other electronic components, and is also a development and design circuit mode commonly used in products such as household appliances, wireless communication devices, microcomputers and the like. In the experiment, when the switches SW2, SW3 and SW4 are closed, the corresponding LEDs 22, LED23, LED2, LED25 and LED26 are lighted.

The crystal oscillator, the capacitor, the MOS tube, the three-terminal voltage stabilization and frequency division IC function experiment circuit is a function experiment module which is developed and designed for verifying the working principle, the function and the application of the crystal oscillator, the MOS tube and the frequency division chip. As shown in fig. 4, the functional experimental circuit of the crystal oscillator, the capacitor, the MOS transistor, the three-terminal regulator and the frequency-dividing IC includes electronic components such as a crystal oscillator X1, a three-terminal regulator chip U2, flip-flops U3, U4, U5, and U6, and frequency-dividing chips U7 and U8, which are also frequency-dividing modes commonly used in products such as household appliances, wireless communication devices, and microcomputers. In the experiment, after the switch SW5 is closed, the corresponding LED lamp group flickers. As shown in fig. 11, the LED lamp group in the crystal oscillator, the capacitor, the MOS transistor, the three-terminal regulator and the frequency-dividing IC function experiment circuit is composed of an LED4, an LED5, an LED9, an LED10, an LED11, an LED12, an LED28, an LED29, an LED30, an LED31, an LED32, and an LED 33. As shown in fig. 11, the LED lamp group is in the shape of a vertical bar for easy identification.

The third layer has 4 circuit areas, from left to right is sound collection (AD conversion) function experimental circuit, intelligent desk lamp dimmer circuit experimental circuit, WF100SPZ surface pressure sensor experimental circuit to and opto-coupler, relay and triode function experimental circuit in proper order.

The sound collection (AD conversion) function experiment circuit is a function experiment module developed and designed for verifying the working principle, function and application of components such as a microphone, a comparator LM393 chip, a triode, an LED lamp and the like, as shown in fig. 5, the sound collection (AD conversion) function experiment circuit comprises electronic components such as a microphone GMI6027P, a comparator U17, a triode Q15 and the like, and is also a digital-to-analog conversion module commonly used in products such as household appliances, medical equipment, microcomputers and the like. Referring to fig. 12, the LED lamp group of the sound collection (AD conversion) function test circuit is composed of 10 LED lamps, i.e., LED70-LED80, and the 10 LED lamps are arranged in an arrow pattern. In an experiment, after the switch SW13 is closed, the microphone is aimed to make sound, and at the moment, the arrow shape of the LED lamp group of the circuit flickers.

The intelligent desk lamp dimming circuit experimental circuit is a functional experimental module developed and designed for verifying the working principle, function and application of components such as a touch chip ADA01AL, a triode, an LED lamp and the like. As shown in fig. 6, the experimental circuit of the dimming circuit of the intelligent desk lamp comprises touch chips U33, U34, U35, a sensor strip TPAD1, TPAD2, TPAD3, and electronic elements such as LED lamps, and is also a touch control module commonly used in products such as household appliances, medical devices, microcomputers, and the like. Referring to fig. 13, the LED lamp includes LEDs 82-86, LEDs 88-92, and LEDs 94-99, and three lamp groups, wherein LEDs 82-86 are arranged in a ring shape, LEDs 88-92 are arranged in a ring shape, and LEDs 94-99 are arranged in a vertical bar shape. In the experiment, after the switch SW12 is closed, any one of the sensing pieces TPAD1, TPAD2 and TPAD3 is touched, so that the corresponding LED lamp group can emit light.

The WF100SPZ surface pressure sensor test circuit is a functional test module developed and designed for verifying the working principle, function and application of components such as an air pressure sensor, an operational amplifier and the like. As shown in fig. 7, the WF100SPZ surface pressure sensor test circuit includes electronic elements such as an air pressure sensor U10 and an operational amplifier U11, and is also a gas pressure measurement module commonly used in products such as home appliances, medical equipment, and microcomputers. Referring to fig. 14, the lamp group of the WF100SPZ surface pressure sensor test circuit is composed of LEDs 44-47, LEDs 49-52, LEDs 44-47 arranged in a fork pattern, and LEDs 49-52 arranged in a hook pattern. In the experiment, after the SW11 and the SW17 are closed, the fork-shaped pattern formed by the LEDs 44 and the LEDs 47 emits light, and if air is blown to the air pressure sensor U10 at the moment, the hook-shaped pattern formed by the LEDs 44 and the LEDs 47 emits light, so that the circuit function is displayed through the fork-shaped pattern and the hook-shaped pattern in a very vivid mode.

The optical coupler, relay and triode function experiment circuit is a function experiment module developed and designed for verifying the working principle, function and application of components such as the optical coupler, the relay and the triode. As shown in fig. 8, the optical coupler, relay and transistor function test circuit includes an optical coupler U9, a relay HK4100F, transistors Q10, Q11 and other electronic components, and is also an isolation control mode commonly used in products such as household appliances, wireless communication devices and microcomputers. In an experiment, after the switch SW10 is closed, the LED34 is normally on, and when the relay HK4100F works, the LED35, the LED36, the LED38, the LED39 and the LED40-LED42 flicker.

The fourth layer has 2 two line areas, from left to right are the function experiment circuit of the dual-channel loudspeaker and the function experiment circuit of the timer circuit respectively.

The functional experimental circuit of the dual-channel loudspeaker is a functional experimental module which is developed and designed for verifying the working principle, the function and the application of components such as a power amplifier chip TDA2822, a sound input and output interface, a loudspeaker and the like. As shown in fig. 9, the two-channel speaker function experiment circuit includes electronic components such as a power amplifier chip U13, an AUDIO input/output interface AUDIO, speakers SPK1, SPK2, and is also a circuit design module commonly used in products such as household appliances, medical devices, entertainment devices, and microcomputers. In the experiment, after the switch SW14 is closed, AUDIO data is transmitted to the power amplifier chip U13 through the AUDIO input/output interface AUDIO, and the AUDIO data is processed by the power amplifier chip U13 and then output to the speakers SPK1 and SPK2, so that the sound can be heard.

The function experiment circuit of the timer circuit is a function experiment module which is developed and designed for verifying the working principle, the function and the application of components such as a time base NE555D chip, an inverter SN74LS14DR chip, a synchronous decimal reversible counter SN74LS192N, a 7-segment display decoder SN74LS48N, a common cathode nixie tube and the like. As shown in FIG. 10, the function test circuit of the timer circuit comprises a time base chip NE555D, an inverter U20, a synchronous decimal reversible counter U24, electronic elements such as nixie tubes U29, U30, U31 and U32, and is also a circuit design module commonly adopted by products such as household appliances, medical equipment, entertainment equipment, microcomputers and the like. In the experiment, 4 nixie tubes display the countdown of time after the closing switches SW15 and SW16 are closed, and the countdown is started in units of 60 seconds.

In this embodiment, the single-layer PCB substrate is a bare board, all electronic components thereon are manually soldered by students, and in order to facilitate soldering, the component pads and the switch pads are widened for facilitating soldering by students. Meanwhile, the test points are arranged on the circuit, so that students can measure test data through the test points and can quickly check out bad points through the test points when welding has problems.

Compare with current electronic circuit experiment board, the beneficial effects of the utility model reside in that:

(1) the single-layer PCB is used as the substrate, the front surface of the substrate is provided with the plurality of mutually independent circuit areas, and the circuits of the circuit areas are arranged on the front surface of the single-layer PCB in a visible mode, so that students can more intuitively and clearly check how the electronic elements are connected, and the students can conveniently learn, understand and master the connection relation among the electronic elements;

(2) the widened element pad positions and the widened test point positions are arranged on the lines of the line area, so that manual welding of students is facilitated, the condition of poor welding is known through the test point positions, correction is timely performed, and the students can learn and record experimental data conveniently;

(3) a modular structure is formed by arranging a plurality of independent circuit areas, so that functional experimental circuits of a plurality of different functional electronic elements are arranged on the same substrate, and the unit-by-unit learning of students is facilitated;

(4) through set up the switch pad that is used for welding the switch in each circuit district to the student carries out independent on-off control through the switch of welding on the switch pad to the function test circuit in this circuit district, is convenient for divide module study and operation.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (3)

1. The experimental board is characterized by comprising a single-layer PCB substrate, wherein the front surface of the single-layer PCB substrate is provided with a plurality of mutually independent circuit areas, a circuit in each circuit area is arranged on the front surface of the single-layer PCB substrate in a visible mode, a circuit of each circuit area is provided with a component bonding pad for welding a functional electronic component and a peripheral electronic component and a test point for measuring the welding effect of the functional electronic component and/or the peripheral electronic component, and the peripheral electronic component comprises an LED lamp group for displaying the working state of the functional electronic component; the LED lamp group is composed of a plurality of LED lamp beads and is arranged in a pattern with an indicating effect.

2. The panel of claim 1, wherein the pattern comprises an arrow pattern, a ring pattern, a vertical bar pattern, a fork pattern, and a hook pattern.

3. The board of claim 1 or 2, wherein a switch pad for soldering a switch is provided on the circuit of each circuit region.

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