CN203858797U - Single-chip microcomputer experiment box - Google Patents
Single-chip microcomputer experiment box Download PDFInfo
- Publication number
- CN203858797U CN203858797U CN201420280796.6U CN201420280796U CN203858797U CN 203858797 U CN203858797 U CN 203858797U CN 201420280796 U CN201420280796 U CN 201420280796U CN 203858797 U CN203858797 U CN 203858797U
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- circuit
- voltage
- output
- direct current
- experiment
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Abstract
The utility model relates to a single-chip microcomputer experiment box. The single-chip microcomputer experiment box comprises an experiment substrate, a plurality of experiment module circuits arranged on the experiment substrate, a direct-current voltage stabilizing circuit, a direct-current voltage converting circuit with multiple-output, a switch tube, a transformer, a plurality of direct-current output sub circuits, a feedback sub circuit and a resonance control module. According to the utility model, direct-current voltage output ends are arranged in all the experiment module areas, so that interference among signals is avoided when the plurality of experiment module circuits are working, and the line construction is very convenient.
Description
Technical field
The utility model relates to a kind of experimental box, relates in particular to a kind of singlechip experimental box.
Background technology
Traditional singlechip experimental box all carries stabilized voltage supply for experiment use, and its stabilized voltage supply often adopts tandem stabilized voltage supply, and the efficiency of this stabilized voltage supply is lower, and load capacity is also more weak; And when carrying out Course Exercise, often the circuit module of design is many, there is mimic channel, have digital circuit, if still adopt tandem stabilized voltage supply, simulating signal and digital signal just there will be interference, have a strong impact on experiment effect, therefore, on experimental box, need to relate to that a kind of effectively to avoid the stabilized voltage supply interfering with each other be the technical barrier of this area.
Utility model content
The purpose of this utility model is to provide a kind of singlechip experimental box, and the DC voltage converting circuit that this experimental box is exported by multichannel has solved the technical matters that multichannel independent current source voltage is provided.
For solving the problems of the technologies described above, the utility model provides a kind of singlechip experimental box, comprise: experimental substrate, be positioned at some experiment modules of experimental substrate, in each experiment module region, be equipped with DC voltage output end, and the DC voltage converting circuit that also comprises multichannel output, this DC voltage converting circuit comprises: switching tube, transformer, some direct current output electronic circuits, feedback sub-circuit, and the resonance control module being connected with the output terminal of D.C. regulated power supply; Described D.C. regulated power supply comprises: bridge rectifier circuit, and the filtering circuit being connected with this bridge rectifier circuit, with the three terminal regulator that this filtering circuit is connected, the output terminal of this three terminal regulator is connected with the input end of resonance control module; First, second end of described switching tube is connected with the output terminal of resonance control module, the primary coil of transformer respectively, and the 3rd end of this switching tube is by a resistance eutral grounding; The secondary coil of described transformer is connected with the input end of each direct current output electronic circuit; The earth terminal of described each direct current output electronic circuit is respectively as independent grounding end; Described feedback sub-circuit, this feedback sub-circuit comprises: photoelectric coupling module, the first end of this photoelectric coupling module gathers feedback voltage from the output terminal of a direct current output electronic circuit, and its second end is connected with a mu balanced circuit; The the 3rd, the 4th end of described photoelectric coupling module is connected with feedback input end, the reference voltage end of resonance control module respectively; The output terminal of each direct current output electronic circuit is respectively as each DC voltage output end.
The utility model is with respect to the effect of prior art: (1) the utility model is by the DC voltage output end being provided with in each experiment module region, realized when a plurality of experiment modules carry out work, avoided the interference between signal, and it is very convenient to build circuit; (2) by resonance control module, switching tube, transformer, the circuit that each direct current output electronic circuit forms has been realized the function of multichannel output, to meet the power supply needs of follow-up digital circuit, mimic channel; (3) earth terminal of each direct current output electronic circuit independent setting respectively, has avoided when being used as mimic channel or digital circuit power source, the crosstalking of simulating signal and digital signal; (4) by adding feedback sub-circuit, to realize when fluctuation appears in voltage, by the effect of feedback stability output voltage.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the structured flowchart of singlechip experimental box of the present utility model;
Fig. 2 is the theory diagram of DC voltage converting circuit of the present utility model;
Fig. 3 is the circuit diagram of DC voltage converting circuit of the present utility model.
Wherein, experimental substrate 1, experiment module 2, DC voltage output end 3, switching tube Q1, transformer T1, the first diode D1, the first capacitor C 2, the second capacitor C 5, the 3rd capacitor C 3, the 4th capacitor C 6, inductance L 1, current mode pwm chip U1, photoelectric coupling module U2, thyristor U3, digital grounding end DGND, analogue ground AGND.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Embodiment
As shown in Figure 1 to Figure 3, a kind of singlechip experimental box, comprise: experimental substrate 1, be positioned at some experiment modules 2 of experimental substrate 1, in each experiment module region, be equipped with DC voltage output end 3, the DC voltage converting circuit of multichannel output, this DC voltage converting circuit, comprising: switching tube Q1, transformer T1, some direct current output electronic circuits, and the resonance control module being connected with the output terminal of D.C. regulated power supply.
Described D.C. regulated power supply comprises: bridge rectifier circuit, and the filtering circuit being connected with this bridge rectifier circuit, with the three terminal regulator that this filtering circuit is connected, the output terminal of this three terminal regulator is connected with the input end of resonance control module.
First, second end of described switching tube Q1 is connected with the output terminal of resonance control module, the primary coil of transformer T1 respectively, and the 3rd end of this switching tube Q1 is by a resistance eutral grounding; The secondary coil of described transformer T1 is connected with the input end of each direct current output electronic circuit; The earth terminal of described each direct current output electronic circuit is respectively as independent grounding end, and each independent grounding end can be used separately as digital grounding end, analogue ground; Described feedback sub-circuit, this feedback sub-circuit comprises: photoelectric coupling module U2, the first end (anode of light emitting diode) of this photoelectric coupling module U2 gathers feedback voltage from the output terminal of a direct current output electronic circuit, and its second end (negative electrode of light emitting diode) is connected with a mu balanced circuit; The the 3rd, the 4th end of described photoelectric coupling module U2 (it is respectively emitter, the collector of phototriode) is connected with feedback input end, the reference voltage end of resonance control module respectively, i.e. the pin two of TL3845 chip (VFB end), pin 8(REF end).The output terminal of each direct current output electronic circuit is respectively as each DC voltage output end.
Described resonance control module adopts current mode pwm chip U1, TL3845 chip for example, and three terminal regulator adopts 78L24.
The utility model adopts independently earth terminal setting, can meet the power requirement of digital circuit and mimic channel simultaneously.
Described switching tube Q1 can adopt triode or metal-oxide-semiconductor to realize, and during as employing triode, described first, second, third end is corresponding with base stage, collector, the emitter of triode respectively; As while adopting metal-oxide-semiconductor, described first, second, third end is corresponding with grid G, drain D, the source S of metal-oxide-semiconductor respectively.
Described first, second road direct current output electronic circuit can adopt identical structure, and as shown in Figure 2, it comprises: the first diode D1, the first capacitor C 2, the second capacitor C 5, the 3rd capacitor C 3, the 4th capacitor C 6, inductance L 1; The anode of described the first diode D1 is connected with the first tap of transformer secondary output coil, its negative electrode is connected with one end of the first capacitor C 2, the second capacitor C 5, inductance L 1, the other end of this inductance L 1 is as output terminal, and be connected with one end of the 3rd capacitor C 3, the 4th capacitor C 6, the other end of described the first capacitor C 2, the second capacitor C 5, the 3rd capacitor C 3, the 4th capacitor C 6 is as independent grounding end.
Described mu balanced circuit comprises: thyristor U3, the negative electrode A of this thyristor is connected with the negative electrode of the light emitting diode of photoelectric coupling module U2, the anode K ground connection of thyristor U3, its controlled stage G is connected with the output terminal of a resistor voltage divider network, this resistor voltage divider network be suitable for by some series connection divider resistances achieve a butt joint into feedback voltage carry out dividing potential drop.
Described experimental box also can arrange some DC voltage converting circuit, and the current mode pwm chip in each DC voltage converting circuit is not identical, to realize multiple voltage output.
Obviously, above-described embodiment is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And these belong to apparent variation that spirit of the present utility model extended out or change still among protection domain of the present utility model.
Claims (1)
1. a singlechip experimental box, comprise: experimental substrate, be positioned at some experiment modules of experimental substrate, in each experiment module region, be equipped with DC voltage output end, characterized by further comprising the DC voltage converting circuit of multichannel output, this DC voltage converting circuit comprises: switching tube, transformer, some direct current output electronic circuits, feedback sub-circuit, and the resonance control module being connected with the output terminal of D.C. regulated power supply;
Described D.C. regulated power supply comprises: bridge rectifier circuit, and the filtering circuit being connected with this bridge rectifier circuit, with the three terminal regulator that this filtering circuit is connected, the output terminal of this three terminal regulator is connected with the input end of resonance control module;
First, second end of described switching tube is connected with the output terminal of resonance control module, the primary coil of transformer respectively, and the 3rd end of this switching tube is by a resistance eutral grounding; The secondary coil of described transformer is connected with the input end of each direct current output electronic circuit;
The earth terminal of described each direct current output electronic circuit is respectively as independent grounding end;
Described feedback sub-circuit, this feedback sub-circuit comprises: photoelectric coupling module, the first end of this photoelectric coupling module gathers feedback voltage from the output terminal of a direct current output electronic circuit, and its second end is connected with a mu balanced circuit; The the 3rd, the 4th end of described photoelectric coupling module is connected with feedback input end, the reference voltage end of resonance control module respectively;
The output terminal of each direct current output electronic circuit is respectively as each DC voltage output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280796.6U CN203858797U (en) | 2014-05-28 | 2014-05-28 | Single-chip microcomputer experiment box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280796.6U CN203858797U (en) | 2014-05-28 | 2014-05-28 | Single-chip microcomputer experiment box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858797U true CN203858797U (en) | 2014-10-01 |
Family
ID=51608639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420280796.6U Expired - Fee Related CN203858797U (en) | 2014-05-28 | 2014-05-28 | Single-chip microcomputer experiment box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858797U (en) |
-
2014
- 2014-05-28 CN CN201420280796.6U patent/CN203858797U/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 |
Granted publication date: 20141001 Termination date: 20150528 |
|
| EXPY | Termination of patent right or utility model |