CN107343340A - A kind of adjustable indicator light circuit of brightness - Google Patents
A kind of adjustable indicator light circuit of brightness Download PDFInfo
- Publication number
- CN107343340A CN107343340A CN201710634777.7A CN201710634777A CN107343340A CN 107343340 A CN107343340 A CN 107343340A CN 201710634777 A CN201710634777 A CN 201710634777A CN 107343340 A CN107343340 A CN 107343340A
- Authority
- CN
- China
- Prior art keywords
- battery
- diode
- base chip
- transistor
- pin
- Prior art date
- 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.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The invention discloses a kind of adjustable indicator light circuit of brightness, including base chip, indicator lamp, transistor, slide rheostat when battery, 555, and astable multivibrator is formed by base chip when 555, output vibration square wave, and after being amplified by transistor, driving indicator lamp is lighted, by the dutycycle for controlling vibration square wave, the brightness of illumination of indicator lamp is adjusted, circuit is simple, securely and reliably, it is low in energy consumption, cost is cheap, is easy to produce in batches, has a good application prospect.
Description
Technical field
The present invention relates to a kind of adjustable indicator light circuit of brightness, belong to electronic circuit technology field.
Background technology
In public, the brightness of indicator lamp cannot be adjusted.To the preferable region of light, electric resources can be caused
Waste.Moreover, many places carry out indicator lamp brightness regulation by the way of resistance decompression, power consumption is big, inadequate energy-conserving and environment-protective.
The content of the invention
The purpose of the present invention is that the indicator lamp brightness for overcoming existing public arena cannot be adjusted, and causes electric resources
The problem of waste.The adjustable indicator light circuit of brightness of the present invention, including base chip, indicator lamp when battery, 555, pass through 555
When base chip form astable multivibrator, output vibration square wave, and after being amplified by transistor, driving indicator lamp is lighted,
By controlling the dutycycle of vibration square wave, the brightness of illumination of indicator lamp is adjusted, circuit is simple, and securely and reliably, low in energy consumption, cost is low
It is honest and clean, it is easy to produce in batches, has a good application prospect.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of adjustable indicator light circuit of brightness, it is characterised in that：Base chip U1, indicator lamp L1 during including battery G1,555,
The positive pole with diode D1, transistor T1 emitter stage are connected the positive pole of the battery G1 respectively, the diode D1's
Negative pole is connected with base chip U1 the 4th and the 8th pin, resistance R1 one end when 555 respectively, the other end of the resistance R1
Base chip U1 the 7th pin is connected when one end with resistance R2,555 respectively, and the other end of the resistance R2 is become by sliding
Resistance device RP1 with when 555 base chip U1 second and the 6th pin be connected jointly, base chip U1 the 7th pin is also when described 555
Be connected with diode D2 positive pole, the negative pole of the diode D2 with when 555 base chip U1 second and the 6th pin it is common
Connection, and is connected by electric capacity C1 with battery G1 negative pole, base chip U1 the first pin and battery G1 when described 555
Negative pole be connected, base chip U1 the 5th pin is connected by electric capacity C2 with battery G1 negative pole when described 555, described
Base chip U1 the 3rd pin is connected by resistance R3 with diode D3 negative pole when 555, the positive pole of the diode D3 with
Transistor T1 base stage is connected, and the colelctor electrode of the transistor T1 is connected by indicator lamp L1 with battery G1 negative pole.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The positive pole series connection of the battery G1 is to open
S1 is closed, and filter capacitor C3 is parallel between battery G1 positive and negative electrode.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The voltage of the battery G1 is 12V.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The transistor T1 is PNP transistor.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The colelctor electrode of the transistor T1 is also with two
Pole pipe D4 positive pole is connected, and the negative pole of the diode D4 is connected with transistor T1 emitter stage.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The battery G1 is lithium storage battery.
A kind of foregoing adjustable indicator light circuit of brightness, it is characterised in that：The diode D1 is light emitting diode.
The beneficial effects of the invention are as follows：The adjustable indicator light circuit of brightness of the present invention, including base core when battery, 555
Piece, indicator lamp, astable multivibrator, output vibration square wave are formed by base chip when 555, and amplified by transistor
Afterwards, driving indicator lamp is lighted, and the dutycycle of square wave is vibrated by controlling, adjusts the brightness of illumination of indicator lamp, and circuit is simple, safety
Reliably, low in energy consumption, cost is cheap, is easy to produce in batches, has a good application prospect.
Brief description of the drawings
Fig. 1 is the circuit diagram of the adjustable indicator light circuit of brightness of the present invention.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.Following examples are only used for clearly
Illustrate technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, the adjustable indicator light circuit of brightness of the present invention, including base chip U1 when battery G1,555, refer to
Show that the positive pole with diode D1, transistor T1 emitter stage are connected respectively for lamp L1, battery G1 positive pole, diode D1
For light emitting diode, while battery G1 normal power supplies can be indicated, there is provided pressure drop, base chip U1's is normal when being easy to 555
Powered operation, the negative pole of diode D1 one end phase with base chip U1 the 4th and the 8th pin, resistance R1 when 555 respectively
Connection, the other end of the resistance R1 respectively one end with resistance R2,555 when base chip U1 the 7th pin be connected, it is described
The resistance R2 other end by slide rheostat RP1 with when 555 base chip U1 second and the 6th pin be connected jointly, it is described
Positive pole of base chip U1 the 7th pin also with diode D2 is connected when 555, the negative pole of the diode D2 and base core when 555
Piece U1 second and the 6th pin connect jointly, and be connected by electric capacity C1 with battery G1 negative pole, base core when described 555
Piece U1 the first pin is connected with battery G1 negative pole, when described 555 base chip U1 the 5th pin by electric capacity C2 with
Battery G1 negative pole is connected, the negative pole phase that base chip U1 the 3rd pin passes through resistance R3 and diode D3 when described 555
Connection, the positive pole of the diode D3 are connected with transistor T1 base stage, and the colelctor electrode of the transistor T1 passes through indicator lamp
L1 is connected with battery G1 negative pole.
Preferably, the positive pole series connection of the battery G1 is switch S1, and filter is parallel between battery G1 positive and negative electrode
Ripple electric capacity C3, the reliability that battery G1 voltages provide can be ensured, battery G1 voltage is 12V, ensures indicator lamp
Etc. normal work powered lighting.
Preferably, the transistor T1 is PNP transistor.
Preferably, positive pole of the colelctor electrode of the transistor T1 also with diode D4 is connected, and the diode D4's is negative
Pole is connected with transistor T1 emitter stage, protection transistor T1 that can be good, increases the service life.
The battery G1 is lithium storage battery, and light, capacity is big, is easily installed.
The adjustable indicator light circuit of brightness of the present invention, operation principle are as follows：Pass through base chip U1, resistance R1, electricity when 555
Hinder R2, electric capacity C1 and form astable multivibrator, by the 3rd pin output vibration square wave of base chip U1 when 555, and lead to
After crossing transistor amplification, driving indicator lamp is lighted, and can adjust the brightness of illumination of indicator lamp, moreover it is possible to save electric energy, no stable state is more
The cycle of oscillation of harmonic oscillator, T=0.693（R1+R2+RP1）C1, by adjusting slide rheostat RP1 resistance, it can adjust
The dutycycle of square wave is vibrated, adjusts the brightness of illumination of indicator lamp.
In summary, the adjustable indicator light circuit of brightness of the invention, including base chip when battery, 555, indicator lamp,
Transistor, slide rheostat, astable multivibrator, output vibration square wave are formed by base chip when 555, and pass through crystal
After pipe amplification, driving indicator lamp is lighted, and the dutycycle of square wave is vibrated by controlling, and adjusts the brightness of illumination of indicator lamp, circuit letter
Single, securely and reliably, low in energy consumption, cost is cheap, is easy to produce in batches, has a good application prospect.
General principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
- A kind of 1. adjustable indicator light circuit of brightness, it is characterised in that：Base chip U1, indicator lamp during including battery G1,555 The positive pole with diode D1, transistor T1 emitter stage are connected L1, the battery G1 positive pole respectively, the diode D1 Negative pole be connected respectively with base chip U1 the 4th and the 8th pin, resistance R1 one end when 555, the resistance R1's is another Base chip U1 the 7th pin is connected when holding one end with resistance R2,555 respectively, and the other end of the resistance R2 passes through slip Rheostat RP1 with when 555 base chip U1 second and the 6th pin be connected jointly, base chip U1 the 7th pin when described 555 Positive pole also with diode D2 is connected, the negative pole of the diode D2 with when 555 base chip U1 second and the 6th pin be total to With connection, and it is connected by electric capacity C1 with battery G1 negative pole, base chip U1 the first pin and battery when described 555 G1 negative pole is connected, and base chip U1 the 5th pin is connected by electric capacity C2 with battery G1 negative pole when described 555, institute Base chip U1 the 3rd pin is connected by resistance R3 with diode D3 negative pole when stating 555, the positive pole of the diode D3 It is connected with transistor T1 base stage, the colelctor electrode of the transistor T1 is connected by indicator lamp L1 with battery G1 negative pole Connect.
- A kind of 2. adjustable indicator light circuit of brightness according to claim 1, it is characterised in that：The battery G1 is just Pole series connection is switch S1, and filter capacitor C3 is parallel between battery G1 positive and negative electrode.
- A kind of 3. adjustable indicator light circuit of brightness according to claim 2, it is characterised in that：The electricity of the battery G1 Press as 12V.
- A kind of 4. adjustable indicator light circuit of brightness according to claim 1, it is characterised in that：The transistor T1 is PNP transistor.
- A kind of 5. adjustable indicator light circuit of brightness according to claim 4, it is characterised in that：The collection of the transistor T1 Positive pole of the electrode also with diode D4 is connected, and the negative pole of the diode D4 is connected with transistor T1 emitter stage.
- A kind of 6. adjustable indicator light circuit of brightness according to claim 1, it is characterised in that：The battery G1 is lithium Battery.
- A kind of 7. adjustable indicator light circuit of brightness according to claim 1, it is characterised in that：The diode D1 is hair Optical diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710634777.7A CN107343340A (en) | 2017-07-29 | 2017-07-29 | A kind of adjustable indicator light circuit of brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710634777.7A CN107343340A (en) | 2017-07-29 | 2017-07-29 | A kind of adjustable indicator light circuit of brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107343340A true CN107343340A (en) | 2017-11-10 |
Family
ID=60217639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710634777.7A Withdrawn CN107343340A (en) | 2017-07-29 | 2017-07-29 | A kind of adjustable indicator light circuit of brightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107343340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182099A (en) * | 2019-12-30 | 2020-05-19 | 海信电子科技（深圳）有限公司 | Terminal |
-
2017
- 2017-07-29 CN CN201710634777.7A patent/CN107343340A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182099A (en) * | 2019-12-30 | 2020-05-19 | 海信电子科技（深圳）有限公司 | Terminal |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171110 |
|
| WW01 | Invention patent application withdrawn after publication |