CN203645878U - Indicating lamp and power supply circuit thereof - Google Patents
Indicating lamp and power supply circuit thereof Download PDFInfo
- Publication number
- CN203645878U CN203645878U CN201320811430.2U CN201320811430U CN203645878U CN 203645878 U CN203645878 U CN 203645878U CN 201320811430 U CN201320811430 U CN 201320811430U CN 203645878 U CN203645878 U CN 203645878U
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- resistance
- triode
- pnp triode
- power supply
- resistor
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Abstract
The utility model provides an indicating lamp and a power supply circuit thereof. The indicating lamp power supply circuit is connected with a power supply and an LED lamp, and comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a diode, a polar capacitor, an NPN triode, a PNP triode and a switch; the power supply is successively in series connection with the fourth resistor, the third resistor and the switch and then grounded; the emitter electrode of the PNP triode is connected with the power supply, the base electrode of the PNP triode is connected with a common connecting terminal of the third resistor and the fourth resistor, and the collector electrode of the PNP triode is grounded through the second resistor; the collector electrode of the NPN triode is connected with a common connecting terminal of the third resistor and the switch, and the emitter electrode of the NPN triode is grounded; the cathode of the polar capacitor is connected with the base electrode of the PNP triode through the first resistor, and the anode of the polar capacitor is connected with the collector electrode of the PNP triode; the anode of the diode is grounded, and the cathode of the diode is connected with the cathode of the polar capacitor; and the LED lamp is connected with the collector electrode of the PNP triode. Compared with an indicating lamp controlled by a PWM controller, cost of the indicating lamp power supply circuit is lower.
Description
Technical field
The utility model relates to lamp power circuit engineering field, is specifically related to indicator light and power circuit thereof.
Background technology
In some occasions, need the light effect of giving instruction of bright dark fade effect, the light fixture that plays this indicative function can be described as indicator light.The power circuit of realizing at present the bright dark fade effect of light mostly is PWM controller and controls, and its circuit cost is high.
Utility model content
The pilot lamp power circuit that provides a kind of circuit cost lower is provided the purpose of this utility model.
Pilot lamp power circuit, is connected between power supply V and LED lamp, comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, diode D1, polar capacitor C1, NPN triode Q1, PNP triode Q2 and switch S 1;
Ground connection after described power supply V connects by described the 4th resistance R 4, described the 3rd resistance R 3, described switch S 1 successively,
The base stage that the emitter of described PNP triode Q2 meets described power supply, PNP triode Q2 connects the collector electrode of public connecting end, PNP triode Q2 of described the 3rd resistance R 3 and described the 4th resistance R 4 by described the second resistance R 2 ground connection,
The collector electrode of described NPN triode Q1 connects the public connecting end of described the 3rd resistance R 3 and switch S 1, the grounded emitter of NPN triode Q1,
The negative pole of described polar capacitor C1 by described the first resistance R 1 connect the base stage of described PNP triode Q2, the positive pole of polar capacitor C1 connects the collector electrode of described PNP triode Q2,
The plus earth of described diode D1, the negative electrode of diode D1 connect the negative pole of described polar capacitor C1,
Described LED lamp connects the collector electrode of described PNP triode Q2.
Further, described NPN triode Q1 adopts the triode that model is 9014, and described PNP triode Q2 adopts the triode that model is 9012, and described diode D1 adopts the diode that model is IN4148.
Another object of the present utility model also provides a kind of indicator light that comprises above-mentioned pilot lamp power circuit.
This pilot lamp power circuit has adopted simple components and parts to realize the effect of the bright dark gradual change of light, the indicator light of controlling compared to PWM controller, and its circuit cost is lower.
Brief description of the drawings
Fig. 1 is the pilot lamp power circuit theory schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
With reference to Fig. 1.
The pilot lamp power circuit that the present embodiment provides, be connected between power supply V and LED lamp, comprise the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, polar capacitor C1, diode D1, NPN triode Q1, PNP triode Q2 and switch S 1;
Ground connection after power supply V connects by the 4th resistance R 4, the 3rd resistance R 3, switch S 1 successively,
The base stage that the emitter of PNP triode Q2 meets power supply, PNP triode Q2 connects the public connecting end of the 3rd resistance R 3 and the 4th resistance R 4, the collector electrode of PNP triode Q2 passes through the second resistance R 2 ground connection,
The collector electrode of NPN triode Q1 connects the public connecting end of the 3rd resistance R 3 and switch S 1, the grounded emitter of NPN triode Q1,
The negative pole of polar capacitor C1 by the first resistance R 1 connect the base stage of PNP triode Q2, the positive pole of polar capacitor C1 connects the collector electrode of PNP triode Q2,
The plus earth of diode D1, the negative electrode of diode D1 connect the negative pole of polar capacitor C1,
LED lamp connects the collector electrode of PNP triode Q2.
The operation principle of this pilot lamp power circuit is:
When switch S 1 is closed, connected power supply V, the 4th resistance R 4, the 3rd resistance R 3 to this loop, ground, thereby the 3rd resistance R 3 drags down the base voltage of PNP triode Q2, now PNP triode Q2 conducting, now this pilot lamp power circuit is in conducting state.
After PNP triode Q2 conducting, the Voltage-output of its collector electrode to LED lamp makes LED lamp shinny, and now LED lamp is normal brightness.Simultaneously the collector electrode of PNP triode Q2 also output voltage to polarity capacitor C 1, due to the charging effect of polar capacitor C1, the voltage at its two ends can not suddenly change, can be similar to short circuit, therefore the voltage of the collector electrode of PNP triode Q2 output is loaded on the base stage of NPN triode Q1 after by polar capacitor C1 again by the first resistance R 1, thereby draw high the voltage of the base stage of NPN triode Q1, thereby NPN triode Q1 conducting.
From the above mentioned, after known switch S 1 rapid closing disconnection, due to the charging effect of polar capacitor C1, NPN triode Q1 is still in conducting state, thereby power supply V, the 4th resistance R 4, the 3rd resistance R 3, NPN triode Q1 are connected to this loop, ground, therefore this pilot lamp power circuit is still in conducting state.
And along with the rising gradually of the voltage at polar capacitor C1 two ends, the voltage that is loaded on the base stage of NPN triode Q1 also reduces gradually; In the time that being increased to certain value, the voltage at polar capacitor C1 two ends make the voltage of the base stage that is loaded on NPN triode Q1 be down to it below conducting voltage, thereby NPN triode Q1 cut-off, power supply V, the 4th resistance R 4, the 3rd resistance R 3, NPN triode Q1 disconnect to this loop, ground thus, thereby now PNP triode Q2 is also because its base stage returns to high-voltage state cut-off.Now, polar capacitor C1 discharges by the second resistance R 2 and diode D1.Polar capacitor C1 output voltage in discharge process makes LED lamp shinny, and along with the reduction of the voltage of polar capacitor C1, the brightness of LED lamp also decreases, until extinguish.
The charging interval of polar capacitor C1 determined by the resistance of its capacitance and the first resistance R 1, and determined the discharge time of polar capacitor C1 by the resistance of the electric weight of capacitor C 1 and the resistance of the second resistance R 2, LED lamp.Thus, adopt the rapid conducting of periodic triggers signal closing switch S1 can make LED lamp by bright to dimmed gradually periodic duty.
To sum up, this pilot lamp power circuit has adopted simple components and parts to realize the effect of the bright dark gradual change of light, the indicator light of controlling compared to PWM controller, and its circuit cost is lower.
In addition, switch S 1 is in the time of closure or off-state, and LED lamp is in the normal bright or state that often goes out.
Further, NPN triode Q1 adopts the triode that model is 9014, and PNP triode Q2 adopts the triode that model is 9012, and diode D1 adopts the diode that model is IN4148.
The present embodiment also provides the indicator light that comprises above-mentioned pilot lamp power circuit.
Above-mentioned for the utility model illustrates, be not limited to the utility model.
Claims (3)
1. pilot lamp power circuit, be connected between power supply (V) and LED lamp, it is characterized in that, comprise the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), diode (D1), polar capacitor (C1), NPN triode (Q1), PNP triode (Q2) and switch (S1);
Described power supply (V) passes through described the 4th resistance (R4), described the 3rd resistance (R3), the rear ground connection of described switch (S1) series connection successively,
The base stage that the emitter of described PNP triode (Q2) connects described power supply, described PNP triode (Q2) connects the public connecting end of described the 3rd resistance (R3) and described the 4th resistance (R4), the collector electrode of described PNP triode (Q2) passes through described the second resistance (R2) ground connection
The collector electrode of described NPN triode (Q1) connects the public connecting end of described the 3rd resistance (R3) and switch (S1), the grounded emitter of described NPN triode (Q1),
The positive pole that the negative pole of described polar capacitor (C1) connects the base stage of described PNP triode (Q2), described polar capacitor (C1) by described the first resistance (R1) connects the collector electrode of described PNP triode (Q2)
The plus earth of described diode (D1), the negative electrode of diode (D1) connect the negative pole of described polar capacitor (C1),
Described LED lamp connects the collector electrode of described PNP triode (Q2).
2. pilot lamp power circuit as claimed in claim 1, it is characterized in that, described NPN triode (Q1) adopts the triode that model is 9014, described PNP triode (Q2) adopts the triode that model is 9012, and described diode (D1) adopts the diode that model is IN4148.
3. indicator light, is characterized in that, comprises the pilot lamp power circuit described in claim 1,2 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811430.2U CN203645878U (en) | 2013-12-10 | 2013-12-10 | Indicating lamp and power supply circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811430.2U CN203645878U (en) | 2013-12-10 | 2013-12-10 | Indicating lamp and power supply circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645878U true CN203645878U (en) | 2014-06-11 |
Family
ID=50877092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320811430.2U Expired - Fee Related CN203645878U (en) | 2013-12-10 | 2013-12-10 | Indicating lamp and power supply circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203645878U (en) |
-
2013
- 2013-12-10 CN CN201320811430.2U patent/CN203645878U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20181210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |