CN102595742A - Dimming light-emitting diode (LED) torch - Google Patents
Dimming light-emitting diode (LED) torch Download PDFInfo
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- CN102595742A CN102595742A CN2012100757169A CN201210075716A CN102595742A CN 102595742 A CN102595742 A CN 102595742A CN 2012100757169 A CN2012100757169 A CN 2012100757169A CN 201210075716 A CN201210075716 A CN 201210075716A CN 102595742 A CN102595742 A CN 102595742A
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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
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Abstract
The invention belongs to the technical field of electronics and light-emitting diode (LED) application, and relates to a dimming LED torch. The torch comprises a 4.8V direct current power supply, a self-excited oscillation circuit, a pulse width modulation circuit, a square wave amplification circuit and a light-emitting element. In order to overcome the defects of large size, high power consumption and low brightness of an ordinary battery incandescent lamp torch, according to the dimming LED torch, six super-bright white light-emitting diodes can be lit on only by four No. 5 rechargeable batteries, and the dimming LED torch is applicable to family, camping, traveling and other lighting in the nighttime. In the circuits of the dimming LED torch, an NE555 time base circuit is adopted as a core element to adjust the brightness of the LED, and a pulse width modulation circuit (PWM) is adopted as a use method. so the method is an energy-saving, economical and practical technical scheme.
Description
Technical field
The invention belongs to electronics and LED applied technical field, is about a kind of dimming LED (Light Emitting Diode) flashlight.
Background technology
Operating current >=the 240mA of two batteries incandescent lamp flashlights commonly used; And the flashlight operating current made from LED only has 35～70mA; The power that the ordinary incandescent lamp flashlight is consumed is 5～6 times of LED flashlight power approximately, and the luminous brightness of incandescent lamp flashlight also can not show a candle to the LED flashlight.
Have in order to overcome common batteries incandescent lamp flashlight that volume is big, power consumption is big and the low defective of brightness; Dimming LED (Light Emitting Diode) flashlight of the present invention; Its uses No. 5 rechargeable batteries of 4 joints just can light 6 super brightness white light-emitting diodes, night lightings such as it is applicable to the house, camps, out on tours.
What core parts adopted in the dimming LED (Light Emitting Diode) flashlight circuit of the present invention is the NE555 time-base circuit; Regulate the brightness of LED; The method of using is pulse width modulation circuit (that is: PWM), and the dimming LED (Light Emitting Diode) flashlight is a kind of energy-conservation, economic, practical technical scheme.
Below specify the correlation technique content that dimming LED (Light Emitting Diode) flashlight of the present invention relates in implementation process.
Summary of the invention
Goal of the invention and beneficial effect: have in order to overcome common batteries incandescent lamp flashlight that volume is big, power consumption is big and the low defective of brightness; Dimming LED (Light Emitting Diode) flashlight of the present invention; Use No. 5 rechargeable batteries of 4 joints just can light 6 super brightness white light-emitting diodes, be applicable to the house, camp, night lighting such as out on tours.
What core parts adopted in the dimming LED (Light Emitting Diode) flashlight circuit of the present invention is the NE555 time-base circuit; Regulate the brightness of LED; The method that it uses is pulse-width modulation circuit (that is: PWM), and it is a kind of energy-conservation, economic, practical technical scheme.
Technical characterictic: the dimming LED (Light Emitting Diode) flashlight, it is made up of 4.8V DC power supply, self-maintained circuit and pulse-width modulation circuit, square wave amplifying circuit and light-emitting component, and its characteristic comprises:
Self-maintained circuit and pulse-width modulation circuit: form by time-base circuit IC1, capacitor C 1, linear potentiometer RP, switching diode D1, switching diode D2 and resistance R 1; The model that time-base circuit IC1 selects for use is NE555; The 7th pin of time-base circuit IC1 connects the positive pole of switching diode D1, the negative pole of switching diode D2 and an end of resistance R 1; The anodal VCC of the other end connection circuit of the 4th pin of time-base circuit IC1 and the 8th pin and resistance R 1; The negative pole of switching diode D1 connects the end of potentiometer RP; The positive pole of switching diode D2 connects the other end of potentiometer RP, the 2nd pin of the movable knee-joint time-base circuit IC1 of potentiometer RP and an end of the 6th pin and capacitor C 1, the other end connection circuit ground GND of the 1st pin of time-base circuit IC1 and capacitor C 1;
Square wave amplifying circuit and light-emitting component: form by NPN transistor VT1, resistance R 2 and 6 super bright white light-emitting diode LED1～LED6; The end of the 3rd pin connecting resistance R2 of time-base circuit IC1; The base stage of another termination NPN transistor VT1 of resistance R 2; Super bright white light-emitting diode LED1～LED3 connects successively; Super bright white light-emitting diode LED4～LED6 connects successively; The anodal VCC of the anodal connection circuit of the positive pole of super bright white light-emitting diode LED1 and super bright white light-emitting diode LED4, the negative pole of the negative pole of super bright white light-emitting diode LED3 and super bright white light-emitting diode LED6 connects the collector electrode of NPN transistor VT1, the emitter connection circuit ground GND of NPN transistor VT1.
4.8V dc power anode links to each other with circuit anode VCC, the 4.8V dc power cathode links to each other with circuit ground GND.
The operation principle of circuit: the dimming LED (Light Emitting Diode) flashlight is made up of 4.8V DC power supply, self-maintained circuit and pulse width modulation circuit, square-wave pulse amplifying circuit and illuminating circuit; Behind the self-excited oscillator circuit working; The 3rd pin output square-wave pulse by time-base circuit IC1; Holding time of positive pulse and negative pulse regulated through pulse width modulation circuit, thereby changes the frequency of square-wave pulse; Modulation back square-wave pulse signal carries out power amplification through the square wave amplifying circuit again, and it is luminous to promote 6 super bright white light-emitting diode LED at last.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the present invention provides a dimming LED (Light Emitting Diode) flashlight.
Embodiment
Circuit working schematic diagram and description of drawings according to dimming LED (Light Emitting Diode) flashlight shown in the accompanying drawing 1; And according to the annexation between the components and parts in the described each several part circuit of summary of the invention, and the components and parts technical parameter described in the execution mode requires to implement to realize the present invention.
The selection of components and parts and technical parameter thereof
IC1 is a time-base circuit, and model is NE555, and it is encapsulated as 8 pin DIP, each pin function: 1 pin connection circuit ground GND; 2 pin are trigger end; 3 pin outputs; 4 pin preset ends; 5 pin are control voltage; 6 pin thresholdings (threshold value); 7 pin are discharge end; 8 pin meet positive source VCC.
Components and parts title and important technological parameters
| Element number | The components and parts title | Model or index | Quantity | Remarks |
[0019]
| IC1 | NE555 | DIP is direct insertion | 1 | 8 pins |
| VT1 | NPN transistor | 2SC9013 | 1 | β>=160 |
| D1, D2 | Switching diode | 1N4148 | 2 | Or Schottky diode |
| R1 | Metalfilmresistor | 510 Ω | 1 | 1/8W |
| R2 | Metalfilmresistor | 820 Ω | 1 | 1/8W |
| RP | Linear potentiometer | 56K Ω | 1 | |
| C1 | Electric capacity of the dacron | 0.1 μ F | 1 | Vertical |
| LED1～LED6 | Super bright white light-emitting diode | ￠ 5, require parameter consistent | 6 |
Circuit production main points and circuit debugging
Fairly simple because of the circuit structure of dimming LED (Light Emitting Diode) flashlight, make than be easier to, as long as the components and parts performance of use is intact, the physical connection of components and parts is correct, circuit generally need not debugged promptly can operate as normal;
In circuit debugging, the 4.8V DC power supply can be earlier with the adjustable stabilized voltage supply replacement of output current >=0.5A, if find that output load current does not reach 70mA, whether the resistance that should detect resistance R 2 earlier changes, or the resistance of resistance R 2 is suitably reduced to try it;
The output voltage adjustment: voltage >=4.1V between the collector electrode of NPN transistor VT1 and the circuit ground GND, if the about 35～70mA of loaded work piece electric current is the excessive resistance that should suitably reduce the resistance of resistance R 1 or increase resistance R 2 of electric current.
Claims (2)
1. dimming LED (Light Emitting Diode) flashlight, it is made up of 4.8V DC power supply, self-maintained circuit and pulse-width modulation circuit, square wave amplifying circuit and light-emitting component, and its characteristic comprises:
Self-maintained circuit and pulse-width modulation circuit are made up of time-base circuit IC1, capacitor C 1, linear potentiometer RP, switching diode D1, switching diode D2 and resistance R 1; The model that time-base circuit IC1 selects for use is NE555; The 7th pin of time-base circuit IC1 connects the positive pole of switching diode D1, the negative pole of switching diode D2 and an end of resistance R 1; The anodal VCC of the other end connection circuit of the 4th pin of time-base circuit IC1 and the 8th pin and resistance R 1; The negative pole of switching diode D1 connects the end of potentiometer RP; The positive pole of switching diode D2 connects the other end of potentiometer RP, the 2nd pin of the movable knee-joint time-base circuit IC1 of potentiometer RP and an end of the 6th pin and capacitor C 1, the other end connection circuit ground GND of the 1st pin of time-base circuit IC1 and capacitor C 1;
Square wave amplifying circuit and light-emitting component are made up of NPN transistor VT1, resistance R 2 and 6 super bright white light-emitting diode LED1～LED6; The end of the 3rd pin connecting resistance R2 of time-base circuit IC1; The base stage of another termination NPN transistor VT1 of resistance R 2; Super bright white light-emitting diode LED1～LED3 connects successively; Super bright white light-emitting diode LED4～LED6 connects successively; The anodal VCC of the anodal connection circuit of the positive pole of super bright white light-emitting diode LED1 and super bright white light-emitting diode LED4, the negative pole of the negative pole of super bright white light-emitting diode LED3 and super bright white light-emitting diode LED6 connects the collector electrode of NPN transistor VT1, the emitter connection circuit ground GND of NPN transistor VT1.
2. dimming LED (Light Emitting Diode) flashlight according to claim 1 is characterized in that: the 4.8V dc power anode links to each other with circuit anode VCC, and the 4.8V dc power cathode links to each other with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100757169A CN102595742A (en) | 2012-03-21 | 2012-03-21 | Dimming light-emitting diode (LED) torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100757169A CN102595742A (en) | 2012-03-21 | 2012-03-21 | Dimming light-emitting diode (LED) torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102595742A true CN102595742A (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100757169A Pending CN102595742A (en) | 2012-03-21 | 2012-03-21 | Dimming light-emitting diode (LED) torch |
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| Country | Link |
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| CN (1) | CN102595742A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832834A (en) * | 2012-08-31 | 2012-12-19 | 长城汽车股份有限公司 | Efficient linear adjustable transformer |
| CN103596325A (en) * | 2013-08-22 | 2014-02-19 | 广西奥顺仪器有限公司 | Large power LED digital linear light modulation system |
| CN104066258A (en) * | 2014-07-15 | 2014-09-24 | 大连交通大学 | LED lighting and dimming control system based on PWM |
| CN104812150A (en) * | 2015-05-21 | 2015-07-29 | 周芸 | LED (light-emitting diode) dimming flashlight |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612222A (en) * | 2012-03-03 | 2012-07-25 | 刘昭利 | LED (light emitting diode) light adjusting flashlight made by time-base circuit |
| CN202475901U (en) * | 2012-03-21 | 2012-10-03 | 朱虹 | Dimming LED flashlight |
-
2012
- 2012-03-21 CN CN2012100757169A patent/CN102595742A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612222A (en) * | 2012-03-03 | 2012-07-25 | 刘昭利 | LED (light emitting diode) light adjusting flashlight made by time-base circuit |
| CN202475901U (en) * | 2012-03-21 | 2012-10-03 | 朱虹 | Dimming LED flashlight |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832834A (en) * | 2012-08-31 | 2012-12-19 | 长城汽车股份有限公司 | Efficient linear adjustable transformer |
| CN102832834B (en) * | 2012-08-31 | 2015-04-22 | 长城汽车股份有限公司 | Efficient linear adjustable transformer |
| CN103596325A (en) * | 2013-08-22 | 2014-02-19 | 广西奥顺仪器有限公司 | Large power LED digital linear light modulation system |
| CN104066258A (en) * | 2014-07-15 | 2014-09-24 | 大连交通大学 | LED lighting and dimming control system based on PWM |
| CN104812150A (en) * | 2015-05-21 | 2015-07-29 | 周芸 | LED (light-emitting diode) dimming flashlight |
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Application publication date: 20120718 |