CN102802323A - Automatic dimming table lamp - Google Patents
Automatic dimming table lamp Download PDFInfo
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- CN102802323A CN102802323A CN2012103304531A CN201210330453A CN102802323A CN 102802323 A CN102802323 A CN 102802323A CN 2012103304531 A CN2012103304531 A CN 2012103304531A CN 201210330453 A CN201210330453 A CN 201210330453A CN 102802323 A CN102802323 A CN 102802323A
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Abstract
The invention provides an automatic dimming table lamp. The automatic dimming table lamp is composed of a 220V alternating current power supply, a full-bridge rectifying circuit, a 9V voltage stabilizing circuit, a light-sensitive circuit, an optical signal amplification circuit, a bidirectional thyristor trigger circuit and a bidirectional thyristor control circuit, and is characterized in that the type of a unijunction transistor VT2 in the bidirectional thyristor trigger circuit is BT33. According to the automatic dimming table lamp provided by the invention, a light-sensitive resistor is placed in a proper position of a table lamp, and the intensity of illumination around the table lamp can be automatically adjusted to a proper value, thereby reducing the trouble of manual dimming and protecting the eyesight of students. Simultaneously, the automatic dimming table lamp also has a function of stabilizing the light brightness, thus when 220V alternating voltage fluctuates, the brightness of the table lamp is kept unchanged. The brightness of the dimming table lamp can be changed by only changing the distance between the light-sensitive resistor and the bulb of the table lamp, thereby being very convenient to use. The automatic dimming table lamp is suitable for factories to develop a novel table lamp with a function of automatically controlling illumination.
Description
Technical field
The invention belongs to application of electronic technology and lighting technical field, relate to a kind of desk lamp with an automatic light meter.
Background technology
Lamp dimmer commonly used on the market has a significant disadvantages when reading study; That is: the luminous brightness of desk lamp can only be passed through manual adjustment; The brightness of desk lamp is transferred to much being not easy and is held; For the student, light is crossed the eyesight that all can have influence on the student by force or a little less than crossing especially, and desk lamp itself can not be regulated lamplight brightness automatically along with the variation of surrounding environment brightness.The present invention is a kind of desk lamp with an automatic light meter, and it is placed on the appropriate location of desk lamp by 1 photo resistance, and the illuminance around the desk lamp can be adjusted to appropriate value automatically, both can reduce the trouble of manual light modulation, can protect student's eyesight again.It also has the function of steady light brightness simultaneously, and when fluctuation takes place the 220V alternating current voltage, the brightness of desk lamp will remain constant.You want to change the brightness of lamp dimmer, and are as long as change the distance between photo resistance and the desk lamp bulb, very convenient to use.
It is simple that this desk lamp has a circuit, all uses common components and parts, and only tens yuan of costs of manufacture are well suited for exploitation in batches, also are suitable for the novel reading lamp that factory's exploitation has automatic control illumination function.
Below specify desk lamp with an automatic light meter of the present invention related relevant technologies in implementation process.
Summary of the invention
Goal of the invention and beneficial effect: the present invention is a kind of desk lamp with an automatic light meter; It is placed on the desk lamp appropriate location by 1 photo resistance; Illuminance around the desk lamp can be adjusted to appropriate value automatically, both can reduce the trouble of manual light modulation, can protect student's eyesight again.It also has the function of steady light brightness simultaneously, and when fluctuation takes place the 220V alternating current voltage, the brightness of desk lamp will remain constant.You want to change the brightness of lamp dimmer, and are as long as change the distance between photo resistance and the desk lamp bulb, very convenient to use.It is simple that this desk lamp has a circuit, all uses common components and parts, and only tens yuan of costs of manufacture are well suited for exploitation in batches, also are suitable for the novel reading lamp that factory's exploitation has automatic control illumination function.
The circuit working principle: the typical circuit of its circuit and common lamp dimmer constitutes quite similar.After the 220V alternating voltage is connected into the full bridge rectifier rectification through 4 silicon rectifier diode D1～D4, the one tunnel through resistance R 1 by voltage stabilizing didoe DW voltage stabilizing after, obtain the 9V pulsating dc voltage and supply with uses such as control circuit of bidirectional thyristor; Another road is added to the two ends of incandescent lamp HL and bidirectional triode thyristor SCR.The angle of flow that changes bidirectional triode thyristor SCR can change the brightness of incandescent lamp HL; Control circuit uses the anode voltage of trigger impulse that the 9V pulsating dc voltage can guarantee to export and bidirectional triode thyristor SCR synchronous.The bidirectional triode thyristor circuits for triggering are made up of the relaxation oscillations circuit.
When the 220V alternating current voltage rose, the brightness of incandescent lamp HL increased, and the illumination that photo resistance RG receives increases, and its resistance reduces, and trigger current increases, and the brightness of incandescent lamp HL reduces; It is slack-off that otherwise capacitor C 1 voltage rises, and the bidirectional triode thyristor SCR angle of flow increases, and output voltage increases, and the brightness of incandescent lamp HL also increases thereupon, so automatically with output voltage stabilization on certain numerical value, thereby guaranteed stablizing of incandescent lamp HL brightness.
Technical characterictic: desk lamp with an automatic light meter, it is made up of 220V AC power, full bridge rectifier, 9V voltage stabilizing circuit, photosensitive circuit, light signal amplification circuit, bidirectional triode thyristor circuits for triggering and control circuit of bidirectional thyristor, and its characteristic comprises:
Photosensitive circuit: form by photo resistance RG, trimmer potentiometer RP; The anodal VCC of the termination circuit of photo resistance RG; The end of another termination trimmer potentiometer RP of photo resistance RG and the base stage of PNP transistor VT1, the other end of trimmer potentiometer RP and movable end connection circuit ground GND thereof;
Light signal amplification circuit: form by PNP transistor VT1, resistance R 2 and resistance R 3; The end of the emitter connecting resistance R2 of PNP transistor VT1 and an end of resistance R 3; The anodal VCC of the other end connection circuit of resistance R 2; The other end connection circuit ground GND of resistance R 3, the collector electrode of PNP transistor VT1 connects the bidirectional triode thyristor circuits for triggering;
Bidirectional triode thyristor circuits for triggering: form by unijunction transistor VT2, capacitor C 1 and resistance R 4; The model that unijunction transistor VT2 selects for use is BT33; The emitter e of unijunction transistor VT2 links to each other with the collector electrode of PNP transistor VT1 and an end of capacitor C 1; The other end connection circuit ground GND of capacitor C 1, the anodal VCC of the second base stage b2 connection circuit of the unijunction transistor VT2 of PNP transistor VT1, the first base stage b1 of the unijunction transistor VT2 of PNP transistor VT1 is through resistance R 4 connection circuit ground GND;
Control circuit of bidirectional thyristor: the first anode T1 of bidirectional triode thyristor SCR meets the live wire end L of 220V alternating current through incandescent lamp HL; The first base stage b1 of the control utmost point G order junction transistors VT2 of bidirectional triode thyristor SCR, the second plate T2 of bidirectional triode thyristor SCR meets the zero line side N of 220V alternating current.
Full bridge rectifier: be connected into full bridge rectifier by 4 silicon rectifier diode D1～D4; The live wire end L of 220V alternating current is connected on the input of full bridge rectifier; The positive pole of full bridge rectifier output connects the 9V voltage stabilizing circuit through resistance R 1, and the negative pole of full bridge rectifier output links to each other with circuit ground GND.
The 9V voltage stabilizing circuit: the negative pole of voltage stabilizing didoe DW links to each other with circuit anode VCC, and the positive pole of voltage stabilizing didoe DW links to each other with the negative pole of full bridge rectifier output with circuit ground GND.
Description of drawings
Accompanying drawing 1 is the circuit working schematic diagram of an embodiment of desk lamp with an automatic light meter provided by the invention.
Embodiment
Implement according to the circuit working schematic diagram of the desk lamp with an automatic light meter shown in the accompanying drawing 1 and the specification requirement of description of drawings and the following stated components and parts, can realize the present invention.
The selection of components and parts and technical parameter thereof
D1～D4 is a silicon rectifier diode, and selecting 4 models for use is the silicon rectifier diode of IN4007;
DW is a voltage stabilizing didoe, and the technical parameter of selecting for use is the voltage stabilizing didoe of 9V, any model of 1W;
It is the 1/4W metalfilmresistor that resistance is all selected power for use, and the resistance of resistance R 1 is 30k Ω, and the resistance of resistance R 2 is 2k Ω, and the resistance of resistance R 3 is 100k Ω, and the resistance of resistance R 4 is 100 Ω;
The power of trimmer potentiometer RP is 1W, and its resistance is 47k Ω;
RG is photo resistance, and the model of selecting for use is MG45;
Capacitor C 1 is an electric capacity of the dacron, and its capacity is 0.1 μ F, the withstand voltage 400V of being;
SCR is a bidirectional triode thyristor, and the selected technology parameter is any model of 1A/400V;
The technical parameter that bidirectional triode thyristor is selected for use is any model of 1A/400V;
Incandescent lamp HL should use the incandescent lamp of power≤60W.
Circuit production main points and circuit debugging
When making the circuit of desk lamp with an automatic light meter; As long as the electronic devices and components performance of selecting for use is intact; And the components and parts annexation in the accompanying drawing 1 is welded to specifications, physical connection line and welding quality through scrutiny correct after, but as long as circuit is debugging operate as normal just a little;
Photo resistance RG should be placed on insensitive place, and suggestion photo resistance RG is installed in Desk lamp feet and surveys face, that is: the position that desk lamp light can not direct irradiation is used for experiencing the surrounding environment illuminance, otherwise photo resistance RG overexposure takes place easily;
When circuit debugging, earlier the resistance of trimmer potentiometer RP is transferred to maximum, survey incandescent lamp two ends alternating voltage with universal instrument and should more than 205V,, make it to reach requirement if be lower than the resistance that 200V can slowly reduce trimmer potentiometer RP; Trimmer potentiometer RP generally no longer needs to regulate in the use of desk lamp through after once adjusting.
Claims (3)
1. desk lamp with an automatic light meter, it is made up of 220V AC power, full bridge rectifier, 9V voltage stabilizing circuit, photosensitive circuit, light signal amplification circuit, bidirectional triode thyristor circuits for triggering and control circuit of bidirectional thyristor, and its characteristic comprises:
Described photosensitive circuit is made up of photo resistance RG, trimmer potentiometer RP; The anodal VCC of the termination circuit of photo resistance RG; The end of another termination trimmer potentiometer RP of photo resistance RG and the base stage of PNP transistor VT1, the other end of trimmer potentiometer RP and movable end connection circuit ground GND thereof;
Described light signal amplification circuit is made up of PNP transistor VT1, resistance R 2 and resistance R 3; The end of the emitter connecting resistance R2 of PNP transistor VT1 and an end of resistance R 3; The anodal VCC of the other end connection circuit of resistance R 2; The other end connection circuit ground GND of resistance R 3, the collector electrode of PNP transistor VT1 connects the bidirectional triode thyristor circuits for triggering;
Described bidirectional triode thyristor circuits for triggering are made up of unijunction transistor VT2, capacitor C 1 and resistance R 4; The model that unijunction transistor VT2 selects for use is BT33; The emitter e of unijunction transistor VT2 links to each other with the collector electrode of PNP transistor VT1 and an end of capacitor C 1; The other end connection circuit ground GND of capacitor C 1; The anodal VCC of the second base stage b2 connection circuit of the unijunction transistor VT2 of PNP transistor VT1, the first base stage b1 of the unijunction transistor VT2 of PNP transistor VT1 is through resistance R 4 connection circuit ground GND;
The first anode T1 of bidirectional triode thyristor SCR in the described control circuit of bidirectional thyristor meets the live wire end L of 220V alternating current through incandescent lamp HL; The first base stage b1 of the control utmost point G order junction transistors VT2 of bidirectional triode thyristor SCR, the second plate T2 of bidirectional triode thyristor SCR meets the zero line side N of 220V alternating current.
2. desk lamp with an automatic light meter according to claim 1; It is characterized in that: full bridge rectifier is connected into full bridge rectifier by 4 silicon rectifier diode D1～D4; The live wire end L of 220V alternating current is connected on the input of full bridge rectifier; The positive pole of full bridge rectifier output connects the 9V voltage stabilizing circuit through resistance R 1, and the negative pole of full bridge rectifier output links to each other with circuit ground GND.
3. desk lamp with an automatic light meter according to claim 1 is characterized in that: the negative pole of the voltage stabilizing didoe DW in the 9V voltage stabilizing circuit links to each other with circuit anode VCC, and the positive pole of voltage stabilizing didoe DW links to each other with the negative pole of full bridge rectifier output with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103304531A CN102802323A (en) | 2012-09-09 | 2012-09-09 | Automatic dimming table lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103304531A CN102802323A (en) | 2012-09-09 | 2012-09-09 | Automatic dimming table lamp |
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| CN102802323A true CN102802323A (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103304531A Pending CN102802323A (en) | 2012-09-09 | 2012-09-09 | Automatic dimming table lamp |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219847A (en) * | 2014-09-16 | 2014-12-17 | 常熟市筑紫机械有限公司 | Indoor automatic illumination circuit |
| CN105142295A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Lamplight control device |
| CN105142296A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Adaptive lamplight brightness regulator |
| CN105142297A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Automatic lamplight control device suitable for public places |
| CN106028600A (en) * | 2016-07-12 | 2016-10-12 | 黄月华 | Variable light street lamp with brightness changing with environment |
| CN106102278A (en) * | 2016-07-29 | 2016-11-09 | 吴圣铎 | Brightness flop is with the sensitive street lamp of environmental change |
| CN106793407A (en) * | 2016-12-28 | 2017-05-31 | 生迪智慧科技有限公司 | The method of adjustment and device of ambient brightness |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200499U (en) * | 1988-01-16 | 1988-09-21 | 广东省连平塑料厂 | Automatic illumination-regulating device for keeping illumination constant |
| CN201639828U (en) * | 2010-03-23 | 2010-11-17 | 北京联合大学 | Automatic light-regulating controller for reading lamp |
| CN202738223U (en) * | 2012-09-09 | 2013-02-13 | 刘昭利 | Automatic dimming desk lamp |
-
2012
- 2012-09-09 CN CN2012103304531A patent/CN102802323A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200499U (en) * | 1988-01-16 | 1988-09-21 | 广东省连平塑料厂 | Automatic illumination-regulating device for keeping illumination constant |
| CN201639828U (en) * | 2010-03-23 | 2010-11-17 | 北京联合大学 | Automatic light-regulating controller for reading lamp |
| CN202738223U (en) * | 2012-09-09 | 2013-02-13 | 刘昭利 | Automatic dimming desk lamp |
Non-Patent Citations (1)
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| 电子发烧友网: "自动调光台灯电路工作原理", 《电子发烧友网》, 24 December 2008 (2008-12-24) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219847A (en) * | 2014-09-16 | 2014-12-17 | 常熟市筑紫机械有限公司 | Indoor automatic illumination circuit |
| CN105142295A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Lamplight control device |
| CN105142296A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Adaptive lamplight brightness regulator |
| CN105142297A (en) * | 2015-09-21 | 2015-12-09 | 成都市宏山科技有限公司 | Automatic lamplight control device suitable for public places |
| CN106028600A (en) * | 2016-07-12 | 2016-10-12 | 黄月华 | Variable light street lamp with brightness changing with environment |
| CN106102278A (en) * | 2016-07-29 | 2016-11-09 | 吴圣铎 | Brightness flop is with the sensitive street lamp of environmental change |
| CN106793407A (en) * | 2016-12-28 | 2017-05-31 | 生迪智慧科技有限公司 | The method of adjustment and device of ambient brightness |
| CN106793407B (en) * | 2016-12-28 | 2023-04-25 | 生迪智慧科技有限公司 | Method and device for adjusting ambient brightness |
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Application publication date: 20121128 |