CN203775481U - Light bar control circuit capable of detecting number of loads - Google Patents
Light bar control circuit capable of detecting number of loads Download PDFInfo
- Publication number
- CN203775481U CN203775481U CN201420109375.7U CN201420109375U CN203775481U CN 203775481 U CN203775481 U CN 203775481U CN 201420109375 U CN201420109375 U CN 201420109375U CN 203775481 U CN203775481 U CN 203775481U
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- China
- Prior art keywords
- resistance
- chip microcomputer
- circuit
- effect transistor
- field effect
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- 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.)
- Expired - Lifetime
Links
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 230000005669 field effect Effects 0.000 claims description 18
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a light bar control circuit capable of detecting the number of loads. The light bar control circuit is mainly composed of a single chip microcomputer, a drive circuit connected with the single chip microcomputer, an LED light string serially connected between the single chip microcomputer and the drive circuit, and a current sampling circuit connected with the drive circuit. The light bar control circuit of the utility model can be used to effectively detect the number of the loads (i.e., LED light bars), and when excessive LED light bars are installed, the operation will be stopped automatically so as to ensure the performance stability of the control circuit.
Description
Technical field
The utility model relates to a kind of detection control circuit, specifically refers to a kind of lamp bar control circuit that detects load number.
Background technology
LED lamp bar is a kind of energy-saving illumination product that development in recent years is got up, convenient owing to installing simply, connecting, and makes the application of LED lamp bar very extensive.But because the installation of LED lamp bar is simple, in use, user on the controller of lamp bar and connect more lamp bar, makes controller easily because overcurrent damages uncontrolledly, or due to the more lamp bar of serial connection, makes lamp bar optical parameter variation.How effectively the access quantity of prompting and restriction LED lamp bar, is people's urgent problems.
Utility model content
Whether reasonably the purpose of this utility model is to overcome current people cannot accurately know LED lamp bar quantity installation defect, and a kind of lamp bar control circuit that detects load number is provided.
To achieve these goals, the technical solution adopted in the utility model is as follows: a kind of lamp bar control circuit that detects load number, mainly by single-chip microcomputer, the drive circuit being connected with this single-chip microcomputer, be serially connected in the LED lamp string between single-chip microcomputer and drive circuit, and the current sampling circuit being connected with drive circuit forms.
Further, described drive circuit comprises: field effect transistor Q2, and one end is connected in the resistance R 5 between resistance R 10 and single-chip microcomputer with the resistance R 10 that the grid of field effect transistor Q2 is connected, the other end is connected with single-chip microcomputer, one end ground connection, the other end; Field effect transistor Q3, one end is connected in the resistance R 6 between resistance R 11 and single-chip microcomputer with the resistance R 11 that the grid of field effect transistor Q3 is connected, the other end is connected with single-chip microcomputer, one end ground connection, the other end; And field effect transistor Q4, one end is connected in the resistance R 7 between resistance R 12 and single-chip microcomputer with the resistance R 12 that the grid of field effect transistor Q4 is connected, the other end is connected with single-chip microcomputer, one end ground connection, the other end.
Described current sampling circuit is by Current Control pipe Q1, resistance R 13 and sampling resistor the electric circuit constitute; The collector electrode of Current Control pipe Q1 is connected with single-chip microcomputer, its grounded emitter, and its base stage is connected with sampling resistor circuit after resistance R 13.
Described sampling resistor circuit is formed in parallel by resistance R 14, resistance R 16 and resistance R 15, and one end of the resistance R after parallel connection 14, resistance R 16 and resistance R 15 is connected with resistance R 13, and its other end is connected with the emitter of Current Control pipe Q1.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model circuit structure is very simple, is convenient to make and safeguard.
(2) the utility model can effectively detect the quantity of load (being LED lamp bar), when mounted LED lamp bar is excessive, just can be automatically out of service, thus guarantee the stable performance of control circuit.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
The title of the Reference numeral in above accompanying drawing is respectively:
1-single-chip microcomputer, 2-LED lamp string, 3-drive circuit, 4-current sampling circuit.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, circuit structure of the present utility model is mainly by single-chip microcomputer 1, with the drive circuit 3 that this single-chip microcomputer 1 is connected, three groups that are serially connected between single-chip microcomputer 1 and drive circuit 3 are connected in series the LED lamp string 2 forming by LED lamp, and the current sampling circuit 4 being connected with drive circuit 3 forms.
Drive circuit 3 is as drive part of the present utility model, and it is mainly comprised of field effect transistor Q2, field effect transistor Q3, field effect transistor Q4 and resistance R 10, resistance R 11, resistance R 12, resistance R 5, resistance R 6 and resistance R 7.During connection, the grid of field effect transistor Q2 is connected with the P17 pin of single-chip microcomputer 1 after resistance R 10, and its drain electrode is connected with one group of LED lamp string 2 wherein, simultaneously, one end ground connection of resistance R 5, the other end of resistance R 5 is connected with the tie point of single-chip microcomputer 1 with resistance R 10.
In like manner, the grid of field effect transistor Q3 is connected with the P16 pin of single-chip microcomputer 1 after resistance R 11, and its drain electrode is connected with another group LED lamp string 2, meanwhile, one end ground connection of resistance R 6, the other end of resistance R 6 is connected with the tie point of single-chip microcomputer 1 with resistance R 11.
The grid of field effect transistor Q4 is connected with the P15 pin of single-chip microcomputer 1 after resistance R 12, and its drain electrode is connected with the 3rd group of LED lamp string 2, meanwhile, one end ground connection of resistance R 7, the other end of resistance R 7 is connected with the tie point of single-chip microcomputer 1 with resistance R 12.
4 of current sampling circuits are by Current Control pipe Q1, resistance R 13 and sampling resistor the electric circuit constitute.Wherein, the collector electrode of Current Control pipe Q1 is directly connected with the P00 pin of single-chip microcomputer 1, its grounded emitter, and its base stage is connected with sampling resistor circuit after resistance R 13.According to the actual requirements, this sampling resistor circuit can be sample circuit arbitrarily, as long as can sample to electric current.For this reason, the utility model preferably adopts resistance sampling in parallel to realize.That is, this sampling resistor circuit is formed in parallel by resistance R 14, resistance R 16 and resistance R 15, and one end of the resistance R after parallel connection 14, resistance R 16 and resistance R 15 is connected with resistance R 13, and its other end is connected with the emitter of Current Control pipe Q1.
In order to ensure its result of use, the utility model also has additional auxiliary circuit on single-chip microcomputer 1, and it includes: one end is directly connected with external power source VCC, the condenser network of other end ground connection; One end and the resistance R 1 that the P10 pin of single-chip microcomputer 1 is connected, the other end is connected with external power source VCC, one end is connected with the P0 pin of single-chip microcomputer 1, the resistance R 9 of other end ground connection, the capacitor C 4 being in parallel with resistance R 9, and one end is connected with the P00 pin of single-chip microcomputer 1, the resistance R 2 that the other end is connected with external power source VCC forms.
As mentioned above, just can realize preferably the utility model.
Claims (3)
1. the lamp bar control circuit that can detect load number, it is characterized in that, mainly by single-chip microcomputer (1), the drive circuit (3) being connected with this single-chip microcomputer (1), be serially connected in the LED lamp string (2) between single-chip microcomputer (1) and drive circuit (3), and the current sampling circuit (4) being connected with drive circuit (3) forms; Described drive circuit (3) comprising: field effect transistor Q2, the resistance R 10 that one end is connected with the grid of field effect transistor Q2, the other end is connected with single-chip microcomputer (1), one end ground connection, the other end are connected in the resistance R 5 between resistance R 10 and single-chip microcomputer (1); Field effect transistor Q3, the resistance R 11 that one end is connected with the grid of field effect transistor Q3, the other end is connected with single-chip microcomputer (1), one end ground connection, the other end are connected in the resistance R 6 between resistance R 11 and single-chip microcomputer (1); And field effect transistor Q4, the resistance R 12 that one end is connected with the grid of field effect transistor Q4, the other end is connected with single-chip microcomputer (1), one end ground connection, the other end are connected in the resistance R 7 between resistance R 12 and single-chip microcomputer (1).
2. a kind of lamp bar control circuit that detects load number according to claim 1, is characterized in that: described current sampling circuit (4) is by Current Control pipe Q1, resistance R 13 and sampling resistor the electric circuit constitute; The collector electrode of Current Control pipe Q1 is connected with single-chip microcomputer (1), its grounded emitter, and its base stage is connected with sampling resistor circuit after resistance R 13.
3. a kind of lamp bar control circuit that detects load number according to claim 2, it is characterized in that: described sampling resistor circuit is formed in parallel by resistance R 14, resistance R 16 and resistance R 15, and one end of the resistance R after parallel connection 14, resistance R 16 and resistance R 15 is connected with resistance R 13, its other end is connected with the emitter of Current Control pipe Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109375.7U CN203775481U (en) | 2014-03-11 | 2014-03-11 | Light bar control circuit capable of detecting number of loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109375.7U CN203775481U (en) | 2014-03-11 | 2014-03-11 | Light bar control circuit capable of detecting number of loads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775481U true CN203775481U (en) | 2014-08-13 |
Family
ID=51292621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420109375.7U Expired - Lifetime CN203775481U (en) | 2014-03-11 | 2014-03-11 | Light bar control circuit capable of detecting number of loads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203775481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225872A (en) * | 2021-05-14 | 2021-08-06 | 合肥峻茂视觉科技有限公司 | LED light source system of color selector |
-
2014
- 2014-03-11 CN CN201420109375.7U patent/CN203775481U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225872A (en) * | 2021-05-14 | 2021-08-06 | 合肥峻茂视觉科技有限公司 | LED light source system of color selector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |