CN104812148A - Four-gear LED (Light Emitting Diode) environmental illumination detector - Google Patents
Four-gear LED (Light Emitting Diode) environmental illumination detector Download PDFInfo
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- CN104812148A CN104812148A CN201510260570.9A CN201510260570A CN104812148A CN 104812148 A CN104812148 A CN 104812148A CN 201510260570 A CN201510260570 A CN 201510260570A CN 104812148 A CN104812148 A CN 104812148A
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Abstract
The invention discloses a four-gear LED (Light Emitting Diode) environmental illumination detector. The four-gear LED environmental illumination detector is characterized by comprising a 6V direct-current power supply, a photoelectric conversion circuit and a combined amplification and illumination display circuit, wherein the selected type of a photo-resistor RG in the photoelectric conversion circuit is MG44-03. According to the four-gear LED environmental illumination detector, a NPN type transistor VT1 and a NPN type transistor VT2 form a combined amplification circuit; the working state of the composite amplification circuit is not influenced by the change of the voltage of the direct-current power supply and the change of the environment temperature; although the circuit structure is simple, the working performance is stable and reliable; the requirements on detecting and displaying of environmental illumination can be met thoroughly; the detector is capable of effectively guiding the students to read and study in the suitable light so as to protect the eyesight of the eyes of teenagers; the requirements on qualitative light detection of the environmental illumination can be met.
Description
Technical field
The invention belongs to light illumination to measure and lighting technical field, is about a kind of fourth gear LED ambient light illumination detector.
Background technology
When teenager sees written word, if do not note the power of ambient light, be in the environment reading study that light is too dark for a long time, will the burden of exacerbate ocular, easily suffer from the eye illnesses such as myopia in the course of time.
Fourth gear LED ambient light illumination detector of the present invention forms composite amplifier by NPN transistor VT1, NPN transistor VT2; its operating state does not affect by the change of direct current power source voltage, the change etc. of ambient temperature; although so its circuit structure is simple; but it is stable work in work, reliable; ambient light illumination light-metering and display requirement thereof can be met completely; can effectively to read a book under suitable light study by instruction of papil; to protect the eyesight of teenager's eyes, be also suitable for the demand of the qualitative light-metering of ambient light illumination.
The circuit of fourth gear LED ambient light illumination detector of the present invention is simple, and circuit all uses common components and parts, and cost of manufacture is low, is suitable for factory's batch production.
Below describe in detail fourth gear LED ambient light illumination detector of the present invention necessity involved in implementation process, guardian technique content.
Summary of the invention
Goal of the invention and beneficial effect: fourth gear LED ambient light illumination detector of the present invention forms composite amplifier by NPN transistor VT1, NPN transistor VT2; its operating state does not affect by the change of direct current power source voltage, the change etc. of ambient temperature; although so its circuit structure is simple; but it is stable work in work, reliable; ambient light illumination light-metering and display requirement thereof can be met completely; can effectively to read a book under suitable light study by instruction of papil; to protect the eyesight of teenager's eyes, be also suitable for the demand of the qualitative light-metering of ambient light illumination.The circuit of fourth gear LED ambient light illumination detector of the present invention is simple, and circuit all uses common components and parts, and cost of manufacture is low, is suitable for factory's batch production.
Circuit working principle: when ambient light is darker, the photo resistance RG resistance in photoelectric switching circuit becomes large, when between the base stage and circuit ground GND of Darlington, bias voltage is higher than 2.3V, Darlington conducting, LED 1 is lit; When light is then dimmed again, continuation is become large by the resistance of photo resistance RG.When between the base stage and circuit ground GND of Darlington, bias voltage is higher than 3.7V, Darlington On current becomes very large, and 4 light-emitting diodes are all lighted by driving.
When ambient light is stronger, photo resistance RG is low resistance, so LED 1 lights luminescence, LED 2 is not luminous, representative ring environmental light becomes clear, and applicable used by students during reading writes.
When ambient light is more weak, photo resistance RG is higher resistance value, so LED 1 lights luminescence, LED 2 is also lit luminescence simultaneously, and representative ring environmental light is comparatively dark, should turn on electric light floor light in time.
When ambient light continues dimmed, LED 3, LED 4 also will be lit luminescence successively.
Technical characteristic: fourth gear LED ambient light illumination detector, it comprises 6V DC power supply, photoelectric switching circuit, compound amplification and illumination display circuit, it is characterized in that:
Photoelectric switching circuit: it is made up of resistance R1, linear potentiometer RP and photo resistance RG, the model that photo resistance RG selects is MG44-03, the one termination circuit positive pole VCC of resistance R1, the other end of resistance R1 connects one end of linear potentiometer RP, the base stage of NPN transistor VT1 connects the other end of linear potentiometer RP and one end of movable end and photo resistance RG thereof, the other end connection circuit ground GND of photo resistance RG;
Compound is amplified and illumination display circuit: it is by NPN transistor VT1, NPN transistor VT2, resistance R2 and LED 1, switching diode D1 and resistance R3 and LED 2, switching diode D2 and resistance R4 and LED 3, switching diode D3 and LED 4 form, the collector electrode of NPN transistor VT1 and the collector electrode connection circuit positive pole VCC of NPN transistor VT2, the emitter of NPN transistor VT1 connects the base stage of NPN transistor VT2, the emitter of NPN transistor VT2 connected the positive pole of resistance R2 sending and receiving optical diode LED1, 3 switching diode D1 ~ D3 connect mutually, the emitter of NPN transistor VT2 connects the positive pole of switching diode D1, the negative pole of switching diode D1 connected the positive pole of resistance R3 sending and receiving optical diode LED2, the negative pole of switching diode D2 connected the positive pole of resistance R4 sending and receiving optical diode LED3, the positive pole of the negative pole sending and receiving optical diode LED4 of switching diode D3, negative pole whole connection circuit ground GND of 4 LED 1 ~ LED4,
6V DC power anode is connected with circuit anode VCC, and 6V DC power cathode is connected with circuit ground GND.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit working schematic diagram of a fourth gear LED ambient light illumination detector provided by the invention embodiment.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit working schematic diagram of a fourth gear LED ambient light illumination detector of the present invention embodiment.
Embodiment
According to the fourth gear LED ambient light illumination detector circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in execution mode requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
Embodiment
According to the fourth gear LED ambient light illumination detector circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in execution mode requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
The technical parameter of components and parts and selection requirement
The model that photo resistance RG selects is MG44-03, also can select the models such as MG45, and under the illuminance of 100Lx (lux), its bright resistance also can use in the photo resistance of other model of 5K about Ω;
NPN transistor VT1, NPN transistor VT2 all use 2SC9014, require currentamplificationfactorβ >=150 of two pipes;
D1 ~ D3 is switching diode, and the model that 3 switching diodes are selected is 1N4148;
LED1 ~ LED4 is light-emitting diode, and 4 light-emitting diodes all adopt ￠ 5mm high brightness green light-emitting diode, or adopts High brightness Red LED;
RP is linear potentiometer, and its resistance is 12K Ω;
Resistance all selects RTX-1/8W type fixed carbon resister, and the resistance of resistance R1 is 5.1K Ω, and the resistance of resistance R2 is 100 Ω, and the resistance of resistance R3 is 82 Ω, and the resistance of resistance R4 is 51 Ω;
DC is 6V DC power supply, uses 4 joint 2# MnZn dry cells, or uses 6V D.C. regulated power supply, require operating current >=150mA.
Circuit production main points, circuit debugging and using method
Because the circuit structure of fourth gear LED ambient light illumination detector is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, this device can normally work as long as circuit carries out debugging a little after connecting 6V DC power supply;
When circuit debugging, first the resistance of linear potentiometer RP is transferred to maximum, blocks the light on photo resistance RG with cardboard, make photo resistance RG not receive light, because photo resistance RG is higher resistance value; Next is the resistance of slow linear adjustment potentiometer RP, makes NPN transistor VT1, NPN transistor VT2 conducting, and LED 1 is lighted;
Cardboard or carton are blocked photo resistance RG further, when ambient light reduces further, the resistance of photo resistance RG also reduces further, and now NPN transistor VT1 and NPN transistor VT2 obtains better biased, so LED 2, LED 3 start luminescence; When light is dark especially, 4 LED 1 ~ LED4 are all lit, and so far circuit debugging completes.
Circuit components layout of the present invention, circuit structure design, its shape and size etc. of outward appearance are not all key technologies of the present invention; neither application claims protection technology contents; because not affecting specific implementation process of the present invention, therefore do not illustrate one by one in the description.
Claims (1)
1. a fourth gear LED ambient light illumination detector, it comprises 6V DC power supply, photoelectric switching circuit, compound amplification and illumination display circuit, it is characterized in that:
Described photoelectric switching circuit is made up of resistance R1, linear potentiometer RP and photo resistance RG, the model that photo resistance RG selects is MG44-03, the one termination circuit positive pole VCC of resistance R1, the other end of resistance R1 connects one end of linear potentiometer RP, the base stage of NPN transistor VT1 connects the other end of linear potentiometer RP and one end of movable end and photo resistance RG thereof, the other end connection circuit ground GND of photo resistance RG;
Described compound amplification and illumination display circuit are by NPN transistor VT1, NPN transistor VT2, resistance R2 and LED 1, switching diode D1 and resistance R3 and LED 2, switching diode D2 and resistance R4 and LED 3, switching diode D3 and LED 4 form, the collector electrode of NPN transistor VT1 and the collector electrode connection circuit positive pole VCC of NPN transistor VT2, the emitter of NPN transistor VT1 connects the base stage of NPN transistor VT2, the emitter of NPN transistor VT2 connected the positive pole of resistance R2 sending and receiving optical diode LED1, 3 switching diode D1 ~ D3 connect mutually, the emitter of NPN transistor VT2 connects the positive pole of switching diode D1, the negative pole of switching diode D1 connected the positive pole of resistance R3 sending and receiving optical diode LED2, the negative pole of switching diode D2 connected the positive pole of resistance R4 sending and receiving optical diode LED3, the positive pole of the negative pole sending and receiving optical diode LED4 of switching diode D3, negative pole whole connection circuit ground GND of 4 LED 1 ~ LED4,
Described 6V DC power anode is connected with circuit anode VCC, and 6V DC power cathode is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260570.9A CN104812148A (en) | 2015-05-20 | 2015-05-20 | Four-gear LED (Light Emitting Diode) environmental illumination detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260570.9A CN104812148A (en) | 2015-05-20 | 2015-05-20 | Four-gear LED (Light Emitting Diode) environmental illumination detector |
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| CN104812148A true CN104812148A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510260570.9A Pending CN104812148A (en) | 2015-05-20 | 2015-05-20 | Four-gear LED (Light Emitting Diode) environmental illumination detector |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2339288A1 (en) * | 1977-03-04 | 1977-08-19 | Optalix | Transistor radio tuning indicator - use double amplification of tapped detector voltage to illuminate light emitting diodes |
| CN2537195Y (en) * | 2002-03-29 | 2003-02-19 | 刘伟 | Photometric desk lamp |
| CN2663950Y (en) * | 2003-12-30 | 2004-12-15 | 刘守荣 | Light measuring device for preventing myopia |
| CN203675382U (en) * | 2013-12-30 | 2014-06-25 | 广东瑞德智能科技股份有限公司 | Simple automatic light-controlled circuit |
| US20150028751A1 (en) * | 2013-07-11 | 2015-01-29 | Ellenby Technologies, Inc. | Battery Powered Light Source for Compartment Illumination |
| CN104374472A (en) * | 2014-10-28 | 2015-02-25 | 何林 | Ambient light illumination detecting device |
-
2015
- 2015-05-20 CN CN201510260570.9A patent/CN104812148A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2339288A1 (en) * | 1977-03-04 | 1977-08-19 | Optalix | Transistor radio tuning indicator - use double amplification of tapped detector voltage to illuminate light emitting diodes |
| CN2537195Y (en) * | 2002-03-29 | 2003-02-19 | 刘伟 | Photometric desk lamp |
| CN2663950Y (en) * | 2003-12-30 | 2004-12-15 | 刘守荣 | Light measuring device for preventing myopia |
| US20150028751A1 (en) * | 2013-07-11 | 2015-01-29 | Ellenby Technologies, Inc. | Battery Powered Light Source for Compartment Illumination |
| CN203675382U (en) * | 2013-12-30 | 2014-06-25 | 广东瑞德智能科技股份有限公司 | Simple automatic light-controlled circuit |
| CN104374472A (en) * | 2014-10-28 | 2015-02-25 | 何林 | Ambient light illumination detecting device |
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Application publication date: 20150729 |
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