CN205264198U - Mini audio circuit is used in analog electronics technique teaching - Google Patents
Mini audio circuit is used in analog electronics technique teaching Download PDFInfo
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- CN205264198U CN205264198U CN201620070074.7U CN201620070074U CN205264198U CN 205264198 U CN205264198 U CN 205264198U CN 201620070074 U CN201620070074 U CN 201620070074U CN 205264198 U CN205264198 U CN 205264198U
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Abstract
The utility model provides a mini audio circuit is used in analog electronics technique teaching, including single phase bridge type rectifier circu, power indicator circuit, audio input circuit and power amplification circuit, single phase bridge type rectifier circu's input termination 220V commercial power, output pass through switch S with power indicator circuit and power amplification circuit connect, power amplification circuit's input with audio input circuit connection, the output termination has speaker Y1 and a speaker Y2, and the design of this kind of mini audio circuit is used in analog electronics technique teaching is simple, practical, has synthesized analog electronics technique circuit electronic components commonly used, through principle assay and the debugging to the circuit, helps better characteristic and the application of understanding these common components and parts of student, improved the ability of student integrated analysis circuit, has also strengthened the interest that the student further learnt the analog electronics technique.
Description
Technical field
The utility model relates to technical field of teaching instruments, relates in particular to a kind of imitative electric tech teaching with being confusedYour acoustics circuit.
Background technology
Analog electronic technology course is an important specialized core course of Education About Aids In Vocational Schools's electronic information class specialty, classJourney knowledge theory systematicness is stronger, conceptual abstraction, and practicality is strong; Traditional teaching way by " religion-learn-Doing " integrative project teaching methodology replaces.
Normally, Analog Electronics Technique Experiment content mainly comprises transistor, operational amplifier, integrated powerThe modular circuit such as amplifier and voltage-stabilized power supply, project-based to each unit module accomplished in existing teaching, notReally accomplish the project-based of overall course teaching, interesting and not enough comprehensive, students ' actual situation is answered to electricity consumptionThe design and analysis on road and debugging capability can not be taken exercise.
Utility model content
The technical problems to be solved in the utility model is: exist not with mini audio circuit for existing teachingFoot, the utility model provides a kind of imitative electric tech teaching mini audio circuit, helps student betterUnderstand characteristic and the application of these common components and parts, improve the ability of Students ' Comprehensive analysis circuit.
The utility model solves the technical scheme that its technical problem adopts: a kind of imitative electric tech teachingUse mini audio circuit, comprise single phase bridge type rectifier circu, power supply indicator circuit, audio input circuit andPower amplification circuit, the input termination 220V civil power of described single phase bridge type rectifier circu, output passes through power supplySwitch S is connected with described power supply indicator circuit and power amplification circuit, the input of described power amplification circuitEnd is connected with described audio input circuit, and output is connected to loudspeaker Y1 and loudspeaker Y2;
Described audio input circuit comprises resistance R 1, resistance R 2, and resistance R 3, resistance R 4, capacitor C 8,Capacitor C 9, the first potentiometer RV1 and the second potentiometer RV2, one end of described resistance R 1 is defeated as R channelEnter to hold INr, one end is connected with a fixing pin of described the first potentiometer RV1 in addition, described the first current potentialAnother fixing pin ground connection of the RV1 of device, puts with described power respectively after its slip pin series capacitance C8An input of large circuit is connected with one end of resistance R 3, other one end ground connection of described resistance R 3, instituteState one end of resistance R 2 as R channel input INl, in addition one of one end and described the second potentiometer RV2Individual fixing pin connects, another fixing pin ground connection of the RV2 of described the second potentiometer, its slip pinAfter series capacitance C9, be connected with input of described power amplification circuit and one end of resistance R 4 respectively,Other one end ground connection of described resistance R 4.
As preferably, described power amplification circuit comprises dual operational amplifier chip IC 1, capacitor C 1, electric capacityC2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, resistance R 5 and resistance R 6, described pair of computing putLarge device chip IC 1:
Pin 1 is connected with the positive pole of described capacitor C 3, the negative pole of described capacitor C 3, capacitor C 5, resistance R 5Be connected successively with earth terminal, the negative pole of described capacitor C 3 is also connected with the positive pole of described loudspeaker Y1, described inThe minus earth of loudspeaker Y1;
Pin 3 is connected with the positive pole of described capacitor C 4, the negative pole of described capacitor C 4, capacitor C 6, resistance R 6Be connected successively with earth terminal, the negative pole of described capacitor C 4 is also connected with the positive pole of described loudspeaker Y2, described inThe minus earth of loudspeaker Y2;
Pin 2 is connected with negative output terminal and the positive output end of described single phase bridge type rectifier circu respectively with pin 4;
Pin 7 and pin 6 respectively with slip pin and the second potentiometer RV2 of described the first potentiometer RV1Slip pin connect;
Pin 8 is connected with the positive pole of described capacitor C 1, and pin 5 is connected with the positive pole of described capacitor C 2, instituteState the equal ground connection of negative pole of capacitor C 1 and capacitor C 2.
As preferably, described single phase bridge type rectifier circu comprises transformer B, fuse F1, diode D1, twoUtmost point pipe D2, diode D3, diode D4, filter capacitor C7, Zener diode DW1 and Zener diodeDW2, the former edge joint 220V civil power of described transformer B, after secondary one end series connection fuse F1 respectively with describedThe positive pole of diode D1 is connected with the negative pole of diode D3, the other one end of secondary respectively with described diode D2Positive pole be connected with the negative pole of diode D4, described diode D1 negative pole is connected work with the negative pole of diode D2For the negative output terminal of described single phase bridge type rectifier circu, the negative pole of described diode D1 and diode D2's is negativeThe utmost point connects the positive output end as described single phase bridge type rectifier circu, the positive pole of described diode D3 and diodeThe positive pole of D4 connects the negative output terminal as described single phase bridge type rectifier circu, the positive pole of described filter capacitor C7Be connected with described positive output end, negative pole is connected with described negative output terminal, the negative pole of described Zener diode DW1Be connected with described positive output end, the negative pole of anodal and described Zener diode DW2 is connected, described voltage stabilizing two utmost pointsThe positive pole of pipe DW2 is connected with described negative output terminal.
As preferably, described power supply indicator circuit comprises current-limiting resistance R7 and light emitting diode D5, instituteOne end of stating power switch S is connected with described positive output end, and one end of the other end and described current-limiting resistance R7 connectsConnect, the other end of described current-limiting resistance R7 is connected with the positive pole of described light emitting diode D5, and described luminous twoThe negative pole of utmost point pipe D5 is connected with described negative output terminal.
As preferably, described the first potentiometer RV1 and the second potentiometer RV2 are integrated into duplex potentiometer, instituteThe model of stating dual operational amplifier chip IC 1 is LM358.
As preferably, also comprise battery pack RBT and USB interface, described battery pack RBT and USB interface,The minus earth of described battery pack RBT, anodal and described power switch S is connected, described USB interface one endGround connection, one end is connected with described power switch S in addition.
The beneficial effects of the utility model are that this imitative electric tech teaching passes through single with mini audio circuitPhase bridge rectifier by 220V civil power transformation, rectification, be filtered into the DC voltage of about 10V, is powerAmplifying circuit provides power supply, power turn-on switch, and power amplification circuit is to audio input signal amplification, through couplingClose after filtering, drive speaker operation, change the amplitude of input audio frequency by adjusting duplex potentiometer, reachThe object of volume adjusting, meanwhile, whole circuit design is simple, practical, combines Analog Electronics Technique circuitConventional electronic devices and components, by the principle analysis to circuit and debugging, help student better to understand theseThe characteristic of common components and parts and application, improved the ability of Students ' Comprehensive analysis circuit, also strengthened student and enteredOne step learning simulation electronic technology interest.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the showing of optimum embodiment of imitative electric tech teaching of the present utility model mini audio circuitIntention.
Detailed description of the invention
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, itsIn from start to finish same or similar label represent same or similar element or have identical or similar functionsElement. Exemplary below by the embodiment being described with reference to the drawings, only for explaining the utility model,And can not be interpreted as restriction of the present utility model. On the contrary, embodiment of the present utility model comprise fall into appendedAdd all changes, amendment and equivalent within the scope of spirit and the intension of claims.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally "," length ", " width ", " thickness ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically "," level ", " top ", " end " " interior ", " outward ", " axially ", " radially ", " circumferentially " etc. instruction orientation orPosition relationship is based on orientation shown in the drawings or position relationship, is only the present invention for convenience of description and simplificationDescribe, instead of instruction or hint indication device or element must there is specific orientation, with specific sidePosition structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " etc. are only for describing object, and can not be interpreted as instruction or darkShow relative importance. In description of the present utility model, it should be noted that, unless separately there is clear and definite regulationAnd restriction, term " is connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and also canBeing to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can beDirectly be connected, also can be indirectly connected by intermediary. For the ordinary skill in the art,Can concrete condition understand the concrete meaning of above-mentioned term in the utility model. In addition, at the utility modelDescription in, except as otherwise noted, the implication of " multiple " is two or more.
As shown in Figure 1, the utility model provides a kind of imitative electric tech teaching mini audio circuit,Comprise single phase bridge type rectifier circu, power supply indicator circuit, audio input circuit and power amplification circuit, singleThe input termination 220V civil power of phase bridge rectifier, output is by power switch S and power supply indicator electricityRoad is connected with power amplification circuit, and the input of power amplification circuit is connected with audio input circuit, outputBe connected to loudspeaker Y1 and loudspeaker Y2;
Audio input circuit comprises resistance R 1, resistance R 2, and resistance R 3, resistance R 4, capacitor C 8, capacitor C 9,The first potentiometer RV1 and the second potentiometer RV2, the first potentiometer RV1 and the second potentiometer RV2 are integrated intoDuplex potentiometer, one end of resistance R 1 is as R channel input INr, one end and the first potentiometer RV1 in additionA fixing pin connect, another fixing pin ground connection of the RV1 of the first potentiometer, its slip pinAfter series connection C8, be connected with input of power amplification circuit and one end of resistance R 3 respectively, resistance R 3One end ground connection in addition, one end of resistance R 2 is as R channel input INl, one end and the second potentiometer in additionA fixing pin of RV2 connects, another fixing pin ground connection of the RV2 of the second potentiometer, its slipAfter pin series connection C9, be connected respectively resistance with input of power amplification circuit and one end of resistance R 4Other one end ground connection of R4.
Power amplification circuit comprises dual operational amplifier chip IC 1, capacitor C 1, capacitor C 2, capacitor C 3, electricityHold C4, capacitor C 5, capacitor C 6, resistance R 5 and resistance R 6, dual operational amplifier chip IC 1 model is LM358:
Pin 1 is connected with the positive pole of capacitor C 3, negative pole, capacitor C 5, resistance R 5 and the ground connection of capacitor C 3End connects successively, and the negative pole of capacitor C 3 is also connected with the positive pole of loudspeaker Y1, the minus earth of loudspeaker Y1;
Pin 3 is connected with the positive pole of capacitor C 4, negative pole, capacitor C 6, resistance R 6 and the ground connection of capacitor C 4End connects successively, and the negative pole of capacitor C 4 is also connected with the positive pole of loudspeaker Y2, the minus earth of loudspeaker Y2;
Pin 2 is connected with negative output terminal and the positive output end of single phase bridge type rectifier circu respectively with pin 4;
Pin 7 and pin 6 respectively with the cunning of slip pin and the second potentiometer RV2 of the first potentiometer RV1Moving pin connects;
Pin 8 is connected with the positive pole of capacitor C 1, and pin 5 is connected with the positive pole of capacitor C 2, capacitor C 1 and electricityHold the equal ground connection of negative pole of C2.
Single phase bridge type rectifier circu comprises transformer B, fuse F1, diode D1, diode D2, diodeD3, diode D4, filter capacitor C7, Zener diode DW1 and Zener diode DW2, transformer BFormer edge joint 220V civil power, after secondary one end series connection fuse F1 respectively with positive pole and the diode of diode D1The negative pole of D3 connects, and the other one end of secondary is connected with the positive pole of diode D2 and the negative pole of diode D4 respectively,Diode D1 negative pole is connected the negative output terminal as single phase bridge type rectifier circu, two with the negative pole of diode D2The negative pole of utmost point pipe D1 is connected the positive output end as single phase bridge type rectifier circu, two with the negative pole of diode D2The positive pole of utmost point pipe D3 is connected the negative output terminal as single phase bridge type rectifier circu with the positive pole of diode D4, filterThe positive pole of ripple capacitor C 7 is connected with positive output end, and negative pole is connected with negative output terminal, Zener diode DW1'sNegative pole is connected with positive output end, and positive pole is connected with the negative pole of Zener diode DW2, Zener diode DW2Positive pole be connected with negative output terminal.
Power supply indicator circuit comprises current-limiting resistance R7 and light emitting diode D5, one end of power switch S with justOutput connects, and the other end is connected with one end of current-limiting resistance R7, the other end of current-limiting resistance R7 and luminousThe positive pole of diode D5 connects, and the negative pole of light emitting diode D5 is connected with negative output terminal.
As power supply input, also comprise battery pack RBT and USB interface, battery pack RBT and USB interface,The minus earth of battery pack RBT, positive pole is connected with power switch S, USB interface one end ground connection, one end in additionS is connected with power switch.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ",The description of " concrete example " or " some examples " etc. means the concrete spy in conjunction with this embodiment or example descriptionLevy, structure, material or feature be contained at least one embodiment of the present utility model or example. At thisIn description, the schematic statement of described term is not necessarily referred to identical embodiment or example. And,Specific features, structure, material or the feature described can be in any one or more embodiment or examplesIn with suitable mode combination.
Taking above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevantStaff can, not departing from the scope of this utility model technological thought, carry out various change completelyAnd amendment. The technical scope of this utility model is not limited to the content on description, must rootDetermine its technical scope according to claim scope.
Claims (6)
1. an imitative electric tech teaching mini audio circuit, is characterized in that: comprise that single-phase bridge is wholeCurrent circuit, power supply indicator circuit, audio input circuit and power amplification circuit, described single-phase bridge rectificationThe input termination 220V civil power of circuit, output is by power switch S and described power supply indicator circuit and meritRate amplifying circuit connects, and the input of described power amplification circuit is connected with described audio input circuit, outputTermination has loudspeaker Y1 and loudspeaker Y2;
Described audio input circuit comprises resistance R 1, resistance R 2, and resistance R 3, resistance R 4, capacitor C 8,Capacitor C 9, the first potentiometer RV1 and the second potentiometer RV2, one end of described resistance R 1 is defeated as R channelEnter to hold INr, one end is connected with a fixing pin of described the first potentiometer RV1 in addition, described the first current potentialAnother fixing pin ground connection of the RV1 of device, puts with described power respectively after its slip pin series capacitance C8An input of large circuit is connected with one end of resistance R 3, other one end ground connection of described resistance R 3, instituteState one end of resistance R 2 as R channel input INl, in addition one of one end and described the second potentiometer RV2Individual fixing pin connects, another fixing pin ground connection of the RV2 of described the second potentiometer, its slip pinAfter series capacitance C9, be connected with input of described power amplification circuit and one end of resistance R 4 respectively,Other one end ground connection of described resistance R 4.
2. imitative electric tech teaching as claimed in claim 1 mini audio circuit, is characterized in that:Described power amplification circuit comprises dual operational amplifier chip IC 1, capacitor C 1, capacitor C 2, capacitor C 3, electricityHold C4, capacitor C 5, capacitor C 6, resistance R 5 and resistance R 6, described dual operational amplifier chip IC 1:
Pin 1 is connected with the positive pole of described capacitor C 3, the negative pole of described capacitor C 3, capacitor C 5, resistance R 5Be connected successively with earth terminal, the negative pole of described capacitor C 3 is also connected with the positive pole of described loudspeaker Y1, described inThe minus earth of loudspeaker Y1;
Pin 3 is connected with the positive pole of described capacitor C 4, the negative pole of described capacitor C 4, capacitor C 6, resistance R 6Be connected successively with earth terminal, the negative pole of described capacitor C 4 is also connected with the positive pole of described loudspeaker Y2, described inThe minus earth of loudspeaker Y2;
Pin 2 is connected with negative output terminal and the positive output end of described single phase bridge type rectifier circu respectively with pin 4;
Pin 7 and pin 6 respectively with slip pin and the second potentiometer RV2 of described the first potentiometer RV1Slip pin connect;
Pin 8 is connected with the positive pole of described capacitor C 1, and pin 5 is connected with the positive pole of described capacitor C 2, instituteState the equal ground connection of negative pole of capacitor C 1 and capacitor C 2.
3. imitative electric tech teaching as claimed in claim 2 mini audio circuit, is characterized in that:Described single phase bridge type rectifier circu comprises transformer B, fuse F1, diode D1, diode D2, diodeD3, diode D4, filter capacitor C7, Zener diode DW1 and Zener diode DW2, described transformationThe former edge joint 220V civil power of device B, after secondary one end series connection fuse F1 respectively with the positive pole of described diode D1Be connected with the negative pole of diode D3, the other one end of secondary respectively with positive pole and the diode of described diode D2The negative pole of D4 connects, and described diode D1 negative pole is connected as described single-phase bridge with the negative pole of diode D2The negative output terminal of rectification circuit, the negative pole of described diode D1 is connected with the negative pole of diode D2 described in conductThe positive output end of single phase bridge type rectifier circu, the positive pole of described diode D3 is connected with the positive pole of diode D4As the negative output terminal of described single phase bridge type rectifier circu, the positive pole of described filter capacitor C7 and described positive outputEnd connects, and negative pole is connected with described negative output terminal, the negative pole of described Zener diode DW1 and described positive outputEnd connects, and the negative pole of anodal and described Zener diode DW2 is connected, and described Zener diode DW2 justThe utmost point is connected with described negative output terminal.
4. imitative electric tech teaching as claimed in claim 3 mini audio circuit, is characterized in that:Described power supply indicator circuit comprises current-limiting resistance R7 and light emitting diode D5, one of described power switch SEnd is connected with described positive output end, and the other end is connected with one end of described current-limiting resistance R7, described current-limiting resistanceThe other end of R7 is connected with the positive pole of described light emitting diode D5, the negative pole of described light emitting diode D5 and instituteStating negative output terminal connects.
5. imitative electric tech teaching as claimed in claim 4 mini audio circuit, is characterized in that:Described the first potentiometer RV1 and the second potentiometer RV2 are integrated into duplex potentiometer, described dual operational amplifierThe model of chip IC 1 is LM358.
6. imitative electric tech teaching as claimed in claim 5 mini audio circuit, is characterized in that:Also comprise battery pack RBT and USB interface, described battery pack RBT and USB interface, described battery pack RBTMinus earth, anodal and described power switch S is connected, described USB interface one end ground connection, one end in additionBe connected with described power switch S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620070074.7U CN205264198U (en) | 2016-01-25 | 2016-01-25 | Mini audio circuit is used in analog electronics technique teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620070074.7U CN205264198U (en) | 2016-01-25 | 2016-01-25 | Mini audio circuit is used in analog electronics technique teaching |
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| Publication Number | Publication Date |
|---|---|
| CN205264198U true CN205264198U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620070074.7U Expired - Fee Related CN205264198U (en) | 2016-01-25 | 2016-01-25 | Mini audio circuit is used in analog electronics technique teaching |
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| Country | Link |
|---|---|
| CN (1) | CN205264198U (en) |
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2016
- 2016-01-25 CN CN201620070074.7U patent/CN205264198U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20170125 |