CN106680735A - Switching power supply polarity detection tool with LED indication - Google Patents
Switching power supply polarity detection tool with LED indication Download PDFInfo
- Publication number
- CN106680735A CN106680735A CN201611238031.6A CN201611238031A CN106680735A CN 106680735 A CN106680735 A CN 106680735A CN 201611238031 A CN201611238031 A CN 201611238031A CN 106680735 A CN106680735 A CN 106680735A
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- CN
- China
- Prior art keywords
- diode
- resistance
- led
- audion
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Abstract
The present invention discloses a switching power supply polarity detection tool with LED indication. The tool comprises a diode D1, a light emitting diode (LED), a triode VT1, a resistor R1 and a battery pack E. The anode of the diode D1 is connected with the cathode of a diode D2, an electrode A, a resistor R3 and the negative electrode/anode of the battery pack E. The cathode of the diode D1 is connected with the base electrode of the triode VT1 and the resistor R1, the emission electrode of the triode VT1 is connected with the anode of the diode D2 and the base electrode of a triode VT2, the emission electrode of the triode VT2 is connected with the other end of the resistor R3, the collector of the triode VT2 is connected with the cathode of the light emitting diode (LED), and the anode of the light emitting diode (LED) is connected with the pin 2 of a single-pole double-throw switch S and the resistor R3. The switching power supply polarity detection tool with the LED indication is simple in circuit structure, small in size and low in cost, has a self-checking function and is wide in application.
Description
Technical field
The present invention relates to a kind of detection instrument, specifically a kind of Switching Power Supply Check up polarity instrument indicated with LED.
Background technology
General electrician or appliance maintenance personnel, the electric power polarity detection instrument that it is commonly used is circuit tester, but general-purpose
Table carries very inconvenient, and some non-professional librarian uses are also made troubles, furthermore some personnel are often because some are former
Because detection instrument can be left behind, or relatively forget that withdrawal causes instrument to be lost hastily when leaving, therefore design one kind side
Just the Switching Power Supply Check up polarity instrument carried with has a great deal of practical meanings, the present invention provide it is a kind of band LED instruction
Switching Power Supply Check up polarity instrument, circuit structure is very simple, under volume, low cost, and also band self-checking function, the scope of application
Extensively.
The content of the invention
It is an object of the invention to provide a kind of Switching Power Supply Check up polarity instrument indicated with LED, to solve the above-mentioned back of the body
The problem proposed in scape technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of Switching Power Supply Check up polarity instrument indicated with LED, including diode D1, LED, audion
VT1, resistance R1 and set of cells E, it is characterised in that the diode D1 positive poles connect respectively diode D2 negative poles, electrode A, electricity
Resistance R3 and set of cells E negative pole, diode D1 negative poles difference connecting triode VT1 base stages and resistance R1, audion VT1 emitter stage point
Not Lian Jie diode D2 positive poles and audion VT2 base stages, audion VT2 emitter stages connection the resistance R3 other ends, audion VT2 collection
Electrode connecting luminous diode LED negative poles, LED positive pole connects respectively single-pole double-throw switch (SPDT) S pins 2 and resistance
R3, single-pole double-throw switch (SPDT) S pin 1 connects respectively the resistance R1 other ends, the resistance R3 other ends and electrode B, and the resistance R2 other ends connect
Connect audion VT1 colelctor electrodes；The set of cells E voltage is 6V.
As further scheme of the invention：The single-pole double-throw switch (SPDT) S pins 3 connect respectively resistance R2 and set of cells
E positive poles.
Compared with prior art, the invention has the beneficial effects as follows：The present invention provides a kind of Switching Power Supply pole indicated with LED
Property detection instrument, circuit structure is very simple, and under volume, low cost, and band self-checking function is applied widely.
Description of the drawings
Fig. 1 is the circuit diagram of the Switching Power Supply Check up polarity instrument indicated with LED.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, in the embodiment of the present invention, a kind of Switching Power Supply Check up polarity instrument indicated with LED, including two poles
Pipe D1, LED, audion VT1, resistance R1 and set of cells E, the diode D1 positive poles connect respectively diode D2
Negative pole, electrode A, resistance R3 and set of cells E negative pole, diode D1 negative poles difference connecting triode VT1 base stages and resistance R1, three poles
Pipe VT1 emitter stages connect respectively diode D2 positive poles and audion VT2 base stages, and connection resistance R3 is another for audion VT2 emitter stages
End, audion VT2 colelctor electrode connecting luminous diode LED negative poles, LED positive pole connects respectively single-pole double-throw switch (SPDT)
S pins 2 and resistance R3, single-pole double-throw switch (SPDT) S pins 1 connect respectively the resistance R1 other ends, the resistance R3 other ends and electrode B, single
Double-pole double throw switch S pins 3 connect respectively resistance R2 and set of cells E positive pole, resistance R2 other end connecting triode VT1 colelctor electrodes；
The set of cells E voltage is 6V.
The present invention operation principle be：Fig. 1 is referred to, is detection state when single-pole double-throw switch (SPDT) S gets to 1 foot, work as input
When the polarity of tested power supply is correct, i.e., electrode A connects power cathode, and when electrode B connects positive source, VT1 conductings, VT2 is also switched on,
LED lights, and the effect of diode D2 is to make VT2 base voltages keep constant current, so, no matter VT1 conducting electric currents have much, VT2
The substantially constant current sent, it is ensured that the reliably working of LED, if the opposite polarity of tested power supply,
Diode D1 is turned on, and as a result VT1, VT2 are turned off, and LED extinguishes；It is circuitry self test state when single-pole double-throw switch (SPDT) S gets to 3 foot,
If circuit is both turned on without exception, VT1 and VT2, LED lights.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that for clarity those skilled in the art should
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (2)
1. a kind of Switching Power Supply Check up polarity instrument indicated with LED, including diode D1, LED, audion
VT1, resistance R1 and set of cells E, it is characterised in that the diode D1 positive poles connect respectively diode D2 negative poles, electrode A, electricity
Resistance R3 and set of cells E negative pole, diode D1 negative poles difference connecting triode VT1 base stages and resistance R1, audion VT1 emitter stage point
Not Lian Jie diode D2 positive poles and audion VT2 base stages, audion VT2 emitter stages connection the resistance R3 other ends, audion VT2 collection
Electrode connecting luminous diode LED negative poles, LED positive pole connects respectively single-pole double-throw switch (SPDT) S pins 2 and resistance
R3, single-pole double-throw switch (SPDT) S pin 1 connects respectively the resistance R1 other ends, the resistance R3 other ends and electrode B, and the resistance R2 other ends connect
Connect audion VT1 colelctor electrodes；The set of cells E voltage is 6V.
2. it is according to claim 1 with LED indicate Switching Power Supply Check up polarity instrument, it is characterised in that the hilted broadsword
Commutator S pins 3 connect respectively resistance R2 and set of cells E positive pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238031.6A CN106680735A (en) | 2016-12-28 | 2016-12-28 | Switching power supply polarity detection tool with LED indication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238031.6A CN106680735A (en) | 2016-12-28 | 2016-12-28 | Switching power supply polarity detection tool with LED indication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106680735A true CN106680735A (en) | 2017-05-17 |
Family
ID=58872780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611238031.6A Pending CN106680735A (en) | 2016-12-28 | 2016-12-28 | Switching power supply polarity detection tool with LED indication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106680735A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
-
2016
- 2016-12-28 CN CN201611238031.6A patent/CN106680735A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
| CN108680821B (en) * | 2018-05-28 | 2020-12-08 | 天津市捷威动力工业有限公司 | Be applied to novel frock circuit that BMS detected |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170517 |