CN204613341U - A kind of testing circuit for voice-frequency cable - Google Patents
A kind of testing circuit for voice-frequency cable Download PDFInfo
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- CN204613341U CN204613341U CN201520265963.4U CN201520265963U CN204613341U CN 204613341 U CN204613341 U CN 204613341U CN 201520265963 U CN201520265963 U CN 201520265963U CN 204613341 U CN204613341 U CN 204613341U
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- light emitting
- emitting diode
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- frequency cable
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Abstract
The utility model discloses a kind of testing circuit for voice-frequency cable, comprise electric battery, current-limiting resistance, first voltage stabilizing diode, second voltage stabilizing diode, triode, first light emitting diode, second light emitting diode, 3rd light emitting diode, first plug and the second plug, voice-frequency cable to be tested is plugged between the first plug and the second plug, under normal condition, first light emitting diode, second light emitting diode, 3rd light emitting diode is by voice-frequency cable iron core to be tested, radome along separate routes, if iron core or radome are opened a way or short circuit mutually, the state of light emitting diode will change, thus the expression voice-frequency cable break-make of intuitive display or short circuit.Testing circuit for voice-frequency cable of the present utility model, by the expression voice-frequency cable break-make or the short circuit that light or extinguish intuitive display of light emitting diode, easy to use, safe and reliable, have a good application prospect.
Description
Technical field
The utility model relates to a kind of testing circuit for voice-frequency cable, belongs to electronic circuit technology field.
Background technology
At present, the detection of voice-frequency cable break-make or short circuit adopts traditional multimeter to test, and uses inconvenience, and degree of accuracy is not high, and testing staff is not easy the state intuitively obtaining voice-frequency cable.
Utility model content
The utility model object is that the detection in order to overcome existing voice-frequency cable break-make or short circuit adopts traditional multimeter to test, and uses inconvenience, the problem that degree of accuracy is not high.Testing circuit for voice-frequency cable of the present utility model, by the expression voice-frequency cable break-make or the short circuit that light or extinguish intuitive display of light emitting diode, easy to use, safe and reliable, have a good application prospect.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of testing circuit for voice-frequency cable, it is characterized in that: comprise electric battery G1, current-limiting resistance R1, first voltage stabilizing diode VD1, second voltage stabilizing diode VD2, triode Q1, first light emitting diode D1, second light emitting diode D2, 3rd light emitting diode D3, first plug XS1 and the second plug XS2, the positive pole of described electric battery G1 is connected with the positive pole of the first voltage stabilizing diode VD1 by current-limiting resistance R1, the negative pole of described first voltage stabilizing diode VD1 is connected with the positive pole of the second voltage stabilizing diode VD2, the negative pole of described second voltage stabilizing diode VD2 is connected with the negative pole of electric battery G1, the positive pole of described first voltage stabilizing diode VD1 is also connected with the base stage of triode Q1 by resistance R2, the emitter of described triode Q1 is connected with the negative pole of electric battery G1 by resistance R3, the collector of described triode Q1 is connected with the negative pole of the 3rd light emitting diode D3, the negative pole of described 3rd light emitting diode D3 is held with the A of the first plug XS1 and is connected, the positive pole of described 3rd light emitting diode D3 is held with the A of the second plug XS2 and is connected, the positive pole of described first light emitting diode D1 respectively with the positive pole of electric battery G1, the B end of the first plug XS1 is connected, the negative pole of described first light emitting diode D1 is connected with the positive pole of the second light emitting diode D2, the positive pole of described second light emitting diode D2 is connected with the B of the second plug XS2, the negative pole of described second light emitting diode D2 is held with the A of the second plug XS2 and is connected, voice-frequency cable to be tested is plugged between the first plug XS1 and the second plug XS2.
Aforesaid a kind of testing circuit for voice-frequency cable, is characterized in that: the positive pole of described electric battery G1 is also in series with switch S B.
Aforesaid a kind of testing circuit for voice-frequency cable, is characterized in that: the output voltage of described electric battery G1 is 9V.
Aforesaid a kind of testing circuit for voice-frequency cable, is characterized in that: described triode Q1 is NPN triode.
Aforesaid a kind of testing circuit for voice-frequency cable, is characterized in that: the positive pole of described electric battery G1 is also in series with power supply indication light diode D4.
Aforesaid a kind of testing circuit for voice-frequency cable, is characterized in that: the resistance of described resistance R1 is 10k Ω.
The beneficial effects of the utility model are: the testing circuit for voice-frequency cable of the present utility model, by the expression voice-frequency cable break-make or the short circuit that light or extinguish intuitive display of light emitting diode, easy to use, safe and reliable, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the testing circuit for voice-frequency cable of the present utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is described further.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, a kind of testing circuit for voice-frequency cable, comprise electric battery G1, current-limiting resistance R1, first voltage stabilizing diode VD1, second voltage stabilizing diode VD2, triode Q1, first light emitting diode D1, second light emitting diode D2, 3rd light emitting diode D3, first plug XS1 and the second plug XS2, the positive pole of described electric battery G1 is connected with the positive pole of the first voltage stabilizing diode VD1 by current-limiting resistance R1, the negative pole of described first voltage stabilizing diode VD1 is connected with the positive pole of the second voltage stabilizing diode VD2, the negative pole of described second voltage stabilizing diode VD2 is connected with the negative pole of electric battery G1, the positive pole of described first voltage stabilizing diode VD1 is also connected with the base stage of triode Q1 by resistance R2, the emitter of described triode Q1 is connected with the negative pole of electric battery G1 by resistance R3, the collector of described triode Q1 is connected with the negative pole of the 3rd light emitting diode D3, the negative pole of described 3rd light emitting diode D3 is held with the A of the first plug XS1 and is connected, the positive pole of described 3rd light emitting diode D3 is held with the A of the second plug XS2 and is connected, the positive pole of described first light emitting diode D1 respectively with the positive pole of electric battery G1, the B end of the first plug XS1 is connected, the negative pole of described first light emitting diode D1 is connected with the positive pole of the second light emitting diode D2, the positive pole of described second light emitting diode D2 is connected with the B of the second plug XS2, the negative pole of described second light emitting diode D2 is held with the A of the second plug XS2 and is connected, voice-frequency cable to be tested is plugged between the first plug XS1 and the second plug XS2.
The positive pole of described electric battery G1 is also in series with switch S B, and the output voltage of electric battery G1 is 9V, and triode Q1 is NPN triode, and the positive pole of electric battery G1 is also in series with power supply indication light diode D4, and the resistance of resistance R1 is 10k Ω.
Testing circuit for voice-frequency cable of the present utility model, as shown in Figure 1, under normal condition, D1 and D3 is by the iron core in voice-frequency cable to be tested or radome shunt, and the electric current of D1 and D3 flows through D2, makes D2 normal luminous, if when iron core or radome open circuit or mutually short circuit, the luminescence of light emitting diode will change, table 1 specific as follows
The relation table of table 1 light emitting diode and voice-frequency cable
In sum, the testing circuit for voice-frequency cable of the present utility model, by the expression voice-frequency cable break-make or the short circuit that light or extinguish intuitive display of light emitting diode, easy to use, safe and reliable, have a good application prospect.
More than show and describe ultimate principle of the present utility model, principal character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. the testing circuit for voice-frequency cable, it is characterized in that: comprise electric battery G1, current-limiting resistance R1, first voltage stabilizing diode VD1, second voltage stabilizing diode VD2, triode Q1, first light emitting diode D1, second light emitting diode D2, 3rd light emitting diode D3, first plug XS1 and the second plug XS2, the positive pole of described electric battery G1 is connected with the positive pole of the first voltage stabilizing diode VD1 by current-limiting resistance R1, the negative pole of described first voltage stabilizing diode VD1 is connected with the positive pole of the second voltage stabilizing diode VD2, the negative pole of described second voltage stabilizing diode VD2 is connected with the negative pole of electric battery G1, the positive pole of described first voltage stabilizing diode VD1 is also connected with the base stage of triode Q1 by resistance R2, the emitter of described triode Q1 is connected with the negative pole of electric battery G1 by resistance R3, the collector of described triode Q1 is connected with the negative pole of the 3rd light emitting diode D3, the negative pole of described 3rd light emitting diode D3 is held with the A of the first plug XS1 and is connected, the positive pole of described 3rd light emitting diode D3 is held with the A of the second plug XS2 and is connected, the positive pole of described first light emitting diode D1 respectively with the positive pole of electric battery G1, the B end of the first plug XS1 is connected, the negative pole of described first light emitting diode D1 is connected with the positive pole of the second light emitting diode D2, the positive pole of described second light emitting diode D2 is connected with the B of the second plug XS2, the negative pole of described second light emitting diode D2 is held with the A of the second plug XS2 and is connected, voice-frequency cable to be tested is plugged between the first plug XS1 and the second plug XS2.
2. a kind of testing circuit for voice-frequency cable according to claim 1, is characterized in that: the positive pole of described electric battery G1 is also in series with switch S B.
3. a kind of testing circuit for voice-frequency cable according to claim 1, is characterized in that: the output voltage of described electric battery G1 is 9V.
4. a kind of testing circuit for voice-frequency cable according to claim 1, is characterized in that: described triode Q1 is NPN triode.
5. a kind of testing circuit for voice-frequency cable according to claim 1, is characterized in that: the positive pole of described electric battery G1 is also in series with power supply indication light diode D4.
6. a kind of testing circuit for voice-frequency cable according to claim 1, is characterized in that: the resistance of described resistance R1 is 10k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520265963.4U CN204613341U (en) | 2015-04-29 | 2015-04-29 | A kind of testing circuit for voice-frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520265963.4U CN204613341U (en) | 2015-04-29 | 2015-04-29 | A kind of testing circuit for voice-frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613341U true CN204613341U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520265963.4U Expired - Fee Related CN204613341U (en) | 2015-04-29 | 2015-04-29 | A kind of testing circuit for voice-frequency cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN204613341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808101A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Audio cable detection circuit |
-
2015
- 2015-04-29 CN CN201520265963.4U patent/CN204613341U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808101A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Audio cable detection circuit |
| CN104808101B (en) * | 2015-04-29 | 2017-12-19 | 苏州华徕光电仪器有限公司 | A kind of detection circuit for voice-frequency cable |
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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: 20150902 Termination date: 20160429 |