CN203859685U - Experiment box comprising multiple types of led experiment modules - Google Patents
Experiment box comprising multiple types of led experiment modules Download PDFInfo
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- CN203859685U CN203859685U CN201420253472.3U CN201420253472U CN203859685U CN 203859685 U CN203859685 U CN 203859685U CN 201420253472 U CN201420253472 U CN 201420253472U CN 203859685 U CN203859685 U CN 203859685U
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Abstract
The utility model relates to an experiment box comprising multiple types of led experiment modules, and the box comprises an experiment substrate, a plurality of experiment module circuits located on the experiment substrate, a direct-current voltage-stabilizing circuit, and a single-input and multi-output direct-current voltage conversion circuit. The single-input and multi-output direct-current voltage conversion circuit comprises a switching tube, a transformer, a plurality of direct-current output sub circuits, a feedback sub circuit, and a resonance control module. Through the circuit which consists of the resonance control module, the switching tube, the transformer, and the plurality of direct-current output sub circuits, a multi-output function is achieved, so as to meet the demands of power supply of subsequent digital and analog circuits. The ground ends of the plurality of direct-current output sub circuits are independently arranged, thereby avoiding the crosstalk of digital and analog signals when the direct-current output sub circuits serve as an analog circuit power supply or a digital circuit power supply. Through the adding of the feedback sub circuit, an effect of stably outputting a voltage through feedback is achieved when voltage fluctuation happens.
Description
Technical field
The utility model relates to a kind of experimental box, relates in particular to a kind of experimental box that comprises multiple led experiment module.
Background technology
Traditional LED experimental box all carries stabilized voltage power supply for experiment use, and its stabilized voltage power supply often adopts tandem stabilized voltage power supply, and the efficiency of this stabilized voltage power supply is lower, and load capacity is also more weak; And in the time carrying out Course Exercise, often the circuit module of design is many, there is analog circuit, have digital circuit, if still adopt tandem stabilized voltage power supply, analog 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 power 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 experimental box that comprises multiple led experiment module, and the DC voltage converting circuit that this experimental box is inputted, exported more by list, has solved the technical problem that multichannel independent current source voltage is provided.
For solving the problems of the technologies described above, the utility model provides a kind of experimental box that comprises multiple led experiment module, comprise: experimental substrate, is positioned at some experiment module circuit of experimental substrate, direct current regulation circuit, the DC voltage converting circuit of single input, many outputs, 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 described D.C. regulated power supply output; First, second end of described switching tube is connected with the output of resonance control module, the primary coil of transformer respectively, and the 3rd end of this switching tube is by a grounding through resistance; The secondary coil of described transformer is connected with the input 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 of a direct current output electronic circuit, and its second end is connected with a voltage stabilizing 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 of each direct current output electronic circuit is connected with the feeder ear of corresponding experiment module circuit respectively.
The utility model is with respect to the effect of prior art: (1) by resonance control module, switching tube, and 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, analog circuit; (2) earth terminal of each direct current output electronic circuit independent setting respectively, has avoided in the time being used as analog circuit or digital circuit power source, the crosstalking of analog signal and digital signal; (3) by adding feedback sub-circuit, to realize in the time that fluctuation appears in voltage, by the effect of feedback stability output voltage.
Brief description of the drawings
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 theory diagram of DC voltage converting circuit of the present utility model;
Fig. 2 is the circuit diagram of DC voltage converting circuit of the present utility model.
Wherein, 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 depicted in figs. 1 and 2, a kind of experimental box that comprises multiple led experiment module, comprise: experimental substrate, is positioned at some experiment module circuit of experimental substrate, direct current regulation circuit, the DC voltage converting circuit of single input, many outputs, 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 described D.C. regulated power supply output; First, second end of described switching tube Q1 is connected with the output of resonance control module, the primary coil of transformer T1 respectively, and the 3rd end of this switching tube Q1 is by a grounding through resistance; The secondary coil of described transformer T1 is connected with the input 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 of a direct current output electronic circuit, and its second end (negative electrode of light-emitting diode) is connected with a voltage stabilizing circuit; The the 3rd, the 4th end (it is respectively emitter, the collector electrode of phototriode) of described photoelectric coupling module U2 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 of each direct current output electronic circuit is connected with the feeder ear of corresponding experiment module circuit respectively.
Described direct current regulation circuit can adopt conventional setting, and it comprises: bridge rectifier module, filter circuit, Voltage stabilizing module are realized, and it is suitable for exporting 24V voltage.
Described resonance control module adopts current mode pwm chip U1, for example TL3845 chip.
The utility model adopts independently earth terminal setting, can meet the power reguirements of digital circuit and analog circuit 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 electrode, 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, 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 voltage stabilizing 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 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 execution mode 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 without also giving exhaustive to all execution modes.And these belong to apparent variation that spirit of the present utility model extended out or variation still among protection range of the present utility model.
Claims (1)
1. one kind comprises the experimental box of multiple led experiment module, comprise: experimental substrate, be positioned at some experiment module circuit of experimental substrate, direct current regulation circuit, characterized by further comprising single input, the DC voltage converting circuit of exporting more, and 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 of described D.C. regulated power supply;
First, second end of described switching tube is connected with the output of resonance control module, the primary coil of transformer respectively, and the 3rd end of this switching tube is by a grounding through resistance; The secondary coil of described transformer is connected with the input 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 of a direct current output electronic circuit, and its second end is connected with a voltage stabilizing 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 of each direct current output electronic circuit is connected with the feeder ear of corresponding experiment module circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253472.3U CN203859685U (en) | 2014-05-16 | 2014-05-16 | Experiment box comprising multiple types of led experiment modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253472.3U CN203859685U (en) | 2014-05-16 | 2014-05-16 | Experiment box comprising multiple types of led experiment modules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859685U true CN203859685U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420253472.3U Expired - Fee Related CN203859685U (en) | 2014-05-16 | 2014-05-16 | Experiment box comprising multiple types of led experiment modules |
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| Country | Link |
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| CN (1) | CN203859685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315393A (en) * | 2021-05-21 | 2021-08-27 | 安徽省东科半导体有限公司 | Self-adaptive wide-voltage output circuit of switching power supply |
-
2014
- 2014-05-16 CN CN201420253472.3U patent/CN203859685U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315393A (en) * | 2021-05-21 | 2021-08-27 | 安徽省东科半导体有限公司 | Self-adaptive wide-voltage output circuit of switching power supply |
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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: 20150516 |
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| EXPY | Termination of patent right or utility model |