CN206790732U - A kind of new light adjusting circuit of adjustable dim light electric current - Google Patents
A kind of new light adjusting circuit of adjustable dim light electric current Download PDFInfo
- Publication number
- CN206790732U CN206790732U CN201720466447.7U CN201720466447U CN206790732U CN 206790732 U CN206790732 U CN 206790732U CN 201720466447 U CN201720466447 U CN 201720466447U CN 206790732 U CN206790732 U CN 206790732U
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- electric current
- potentiometer
- switch
- adjustable
- triode
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Abstract
The utility model discloses a kind of new light adjusting circuit of adjustable dim light electric current, including power supply, the parallel connection LED lamp bead group that is connected with power supply and it is connected between power supply and parallel connection LED lamp bead group and has drive circuit, drive circuit includes potentiometer with switch and driving triode, the base stage of driving triode is connected with potentiometer with switch, it is additionally provided with electric current trimming circuit, electric current trimming circuit includes the first adjustable resistance and the second adjustable resistance, first adjustable resistance is in parallel with potentiometer with switch, one end of second adjustable resistance is connected on the tie point of driving triode and potentiometer with switch, the other end is grounded.Structure setting of the present utility model is reasonable, electric current trimming circuit is added on traditional light adjusting circuit, so as to finely tune initial current according to the quantity of different lamp beads, its circuit production cost is relatively low, stability in use is good, and electric current fine setting purpose can be effectively accomplished, greatly improve its applicability and practicality.
Description
Technical field
The utility model belongs to low and middle-end dimming lamp control circuit technical field, a kind of adjustable dim light electricity of specific design
The new light adjusting circuit of stream.
Background technology
In emergency lighting electronics applications, tunable optical light fixture occupies very important position, and this can basis based on it
Actual light intensity degree is with needing to use the time to adjust the function of brightness.It is simplest due to cost requirement in mid and low-end products
Light adjusting circuit only needs potentiometer to change driving tube driving current to realize function, without increasing MCU.Although such circuit
Simply, but problem to be present be exactly or the lamp bead quantity when load light source changes, or light source pressure drop so that electric current can not
Accomplish same standard, especially when being transferred to dim light, the product of same light source has difference, so applicability and practicality are limited
System.
The content of the invention
The purpose of this utility model is to provide the adjustable dim light electric current that a kind of structure setting is reasonable and stability in use is good
New light adjusting circuit.
The technical scheme for realizing the utility model purpose is a kind of new light adjusting circuit of adjustable dim light electric current, including is supplied
Power supply, the parallel connection LED lamp bead group being connected with the power supply and it is connected to power supply and parallel connection LED the lamp bead group
Between have a drive circuit, the drive circuit includes potentiometer with switch and driving triode, the base stage of the driving triode with
Potentiometer with switch is connected, and is additionally provided with electric current trimming circuit, and the electric current trimming circuit can including the first adjustable resistance and second
Resistance is adjusted, first adjustable resistance is in parallel with the potentiometer with switch, and one end of second adjustable resistance is connected to drive
Move on the tie point of triode and potentiometer with switch, the other end is grounded.
The base stage of the driving triode is connected with the output end of potentiometer with switch by 3rd resistor and drives three poles
Pipe and base stage are connected by second resistance with the control terminal of potentiometer with switch, are set between the base stage of driving triode and ground wire
There is a charging capacitor, the colelctor electrode of the driving triode is connected to and on the negative pole of electric LED lamp bead and grounded emitter.
The driving triode is NPN type triode.
The utility model has positive effect：Structure setting of the present utility model is reasonable, on traditional light adjusting circuit
Electric current trimming circuit is added, so as to finely tune initial current according to the quantity of different lamp beads, its circuit production cost is relatively low,
Stability in use is good, and can be effectively accomplished electric current fine setting purpose, greatly improves its applicability and practicality.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail to the utility model, wherein：
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
(embodiment 1)
Fig. 1 shows a kind of embodiment of the present utility model, and wherein Fig. 1 is that circuit structure of the present utility model shows
It is intended to.
See Fig. 1, a kind of new light adjusting circuit of adjustable dim light electric current, including power supply 1 and the power supply 1
The parallel connection LED lamp bead group 2 that is connected and it is connected between the power supply 1 and parallel connection LED lamp bead group 2 and has drive circuit 3, institute
Stating drive circuit 3 includes potentiometer with switch SW1 and driving triode Q1, the base stage and potentiometer with switch of the driving triode Q1
SW1 is connected, and is additionally provided with electric current trimming circuit 4, and the electric current trimming circuit 4 includes the first adjustable resistance R1 and the second adjustable electric
R4 is hindered, the first adjustable resistance R1 is in parallel with the potentiometer with switch SW1, one end connection of the second adjustable resistance R4
On driving triode Q1 and potentiometer with switch SW1 tie point, other end ground connection.
The base stage of the driving triode Q1 is connected and driven with potentiometer with switch SW1 output end by 3rd resistor R3
Dynamic triode Q1 and base stage are connected by second resistance R2 with potentiometer with switch SW1 control terminal, driving triode Q1's
Charging capacitor C1 is provided between base stage and ground wire, the colelctor electrode of the driving triode is connected to and on the negative pole of electric LED lamp bead
And grounded emitter.
The driving triode is NPN type triode.
Its operation principle is summarized as follows：By adjust R4 from R1 resistance to finely tune different lamp bead quantity when starting electricity
Stream so that can be standardized using the electric current of light source of the same race in similar product.
Determine light source and after dimming scope (i.e. potentiometer), if initial current is bigger than standard, R4 is K value resistance, adjustable
Small R4 resistances, driving tube starting base current is somewhat reduced, makes the fine setting of lamp bead electric current is small to arrive normalized current.
If initial current is bigger than standard, R1 is M value resistance, can be set equivalent in potentiometer both ends and a big resistance, R1
An appropriate resistance is put, driving tube starting base current is somewhat increased when being transferred to maximum value, the fine setting of lamp bead electric current is arrived greatly
Normalized current.
In the present embodiment, R1 resistance can not be too small, too small to influence whether dimming effect；SW1 is definite value potentiometer with switch
(circuit having is that switch separates with potentiometer), R2 is base resistance, and Q1 is driving tube, connects LED negative poles.
Structure setting of the present utility model is reasonable, and electric current trimming circuit is added on traditional light adjusting circuit, so as to
To finely tune initial current according to the quantity of different lamp beads, its circuit production cost is relatively low, and stability in use is good, and can be effective
Reach electric current fine setting purpose, greatly improve its applicability and practicality.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.And these belong to the obvious changes or variations that connotation of the present utility model is extended out and still fall within this practicality
New protection domain.
Claims (3)
1. a kind of new light adjusting circuit of adjustable dim light electric current, including power supply, be connected with the power supply and
Connection LED lamp bead group and it is connected between power supply and parallel connection LED the lamp bead group and has drive circuit, the drive circuit includes
Potentiometer with switch and driving triode, the base stage of the driving triode are connected with potentiometer with switch, it is characterised in that：Also set
There is electric current trimming circuit, the electric current trimming circuit includes the first adjustable resistance and the second adjustable resistance, first adjustable electric
Resistance is in parallel with the potentiometer with switch, and one end of second adjustable resistance, which is connected to, drives triode and potentiometer with switch
On tie point, the other end ground connection.
2. the new light adjusting circuit of adjustable dim light electric current according to claim 1, it is characterised in that：Three poles of the driving
The base stage of pipe is connected with the output end of potentiometer with switch by 3rd resistor and drives triode and base stage to pass through second resistance
It is connected with the control terminal of potentiometer with switch, charging capacitor, the driving is provided between the base stage of driving triode and ground wire
The colelctor electrode of triode is connected to and on the negative pole of electric LED lamp bead and grounded emitter.
3. the new light adjusting circuit of adjustable dim light electric current according to claim 2, it is characterised in that：Three poles of the driving
Manage as NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466447.7U CN206790732U (en) | 2017-04-28 | 2017-04-28 | A kind of new light adjusting circuit of adjustable dim light electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466447.7U CN206790732U (en) | 2017-04-28 | 2017-04-28 | A kind of new light adjusting circuit of adjustable dim light electric current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206790732U true CN206790732U (en) | 2017-12-22 |
Family
ID=60709337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720466447.7U Active CN206790732U (en) | 2017-04-28 | 2017-04-28 | A kind of new light adjusting circuit of adjustable dim light electric current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206790732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879739A (en) * | 2020-07-06 | 2020-11-03 | 广东环凯生物科技有限公司 | Test light source system of microbial luminescence tester and detection method thereof |
-
2017
- 2017-04-28 CN CN201720466447.7U patent/CN206790732U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879739A (en) * | 2020-07-06 | 2020-11-03 | 广东环凯生物科技有限公司 | Test light source system of microbial luminescence tester and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230105 Address after: 529000 Room 203, Floor 2, Building 1, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee after: Jiangmen Xiaosong Intelligent Technology Co.,Ltd. Address before: 529000 301, Floor 3, Building 2, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee before: JIANGMEN PENGJIANG DISTRICT JINYING TECHNOLOGY Co.,Ltd. |