CN206164389U - Take time delay power supply circuit of LED instruction - Google Patents
Take time delay power supply circuit of LED instruction Download PDFInfo
- Publication number
- CN206164389U CN206164389U CN201621254321.5U CN201621254321U CN206164389U CN 206164389 U CN206164389 U CN 206164389U CN 201621254321 U CN201621254321 U CN 201621254321U CN 206164389 U CN206164389 U CN 206164389U
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- CN
- China
- Prior art keywords
- triode
- resistance
- led
- time delay
- electric capacity
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- Expired - Fee Related
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Abstract
The utility model discloses a take time delay power supply circuit of LED instruction, including resistance R1, emitting diode LED1, diode D1, electric capacity C1 and triode VT1, triode VT1 collecting electrode and power VCC are connected respectively to resistance R1 one end, triode VT1 base is connected respectively to the resistance R1 other end, electric capacity C2, resistance R2 and triode VT2 projecting pole, it is anodal that emitting diode LED1 is connected to triode VT1 projecting pole, it is anodal that diode D1 is connected to the emitting diode LED1 negative pole, diode D1 negative pole connecting resistance R4, the electric capacity C2 other end is connected respectively to the resistance R4 other end, resistance R and grounded capacitance C1, triode VT3 base is connected to the resistance R7 other end. The utility model discloses take time delay power supply circuit of LED instruction adopts a plurality of triodes to control, and cooperation rc -component sets up emitting diode LED1 and LED2 respectively in reasonable position, in case break down, can find out the trouble return circuit fast through the state of observing two LED, makes things convenient for people to overhaul the investigation.
Description
Technical field
The utility model is related to a kind of power circuit, specifically a kind of time delay power circuit indicated with LED.
Background technology
Power supply is the requisite part of electrical equipment, although in China, is substantially and uses 220V
Alternating current is powered, but in the inside of electrical equipment, many chip components and Resistor-Capacitor Unit are all in DC state work
Make, existing many power electrical apparatus circuits all employ delays time to control mode, but they are in the design of indicator lamp
It is very coarse, it is general that a power supply indicator is just set, once electrical power loop is broken down, need the carrying out of a little to arrange
Look into, increased maintenance difficulty.
Utility model content
The purpose of this utility model is to provide a kind of time delay power circuit indicated with LED, to solve above-mentioned background skill
The problem proposed in art.
For achieving the above object, the utility model provides following technical scheme：
A kind of time delay power circuit indicated with LED, including resistance R1, LED 1, diode D1, electric capacity C1
With triode VT1, respectively connecting triode VT1 colelctor electrodes and power supply VCC, the resistance R1 other ends connect respectively for described resistance R1 one end
Connect triode VT1 base stages, electric capacity C2, resistance R2 and triode VT2 emitter stages, triode VT1 emitter stage connecting luminous diodes
LED1 positive poles, the negative pole of LED 1 connection diode D1 positive poles, diode D1 negative poles connection resistance R4, resistance R4 is another
End connects respectively the electric capacity C2 other ends, resistance R and ground capacity C1, resistance R7 other end connecting triode VT3 base stages, triode
VT3 grounded emitters, triode VT3 colelctor electrode connecting luminous diode LED2 negative poles, the positive pole of LED 2 connects respectively
The connecting resistance R2 other ends and triode VT2 base stages, triode VT2 colelctor electrodes connection output end vo.
As further program of the utility model：The triode VT2 is PNP triode.
As the utility model further scheme：The triode VT1 and triode VT3 is NPN triode.
Compared with prior art, the beneficial effects of the utility model are：The time delay power supply electricity that the utility model is indicated with LED
Road, is controlled using multiple triodes, coordinates Resistor-Capacitor Unit, and in rational position the He of LED 1 is respectively provided with
LED2, once breaking down, can pass through the state of two LED of observation, rapidly find out fault loop, be convenient for people to be overhauled
Investigation.
Description of the drawings
Fig. 1 is the circuit diagram of the time delay power circuit indicated with LED.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is referred to, in the utility model embodiment, a kind of time delay power circuit indicated with LED, including resistance R1,
Distinguish connecting triode VT1 current collections in LED 1, diode D1, electric capacity C1 and triode VT1, described resistance R1 one end
Pole and power supply VCC, resistance R1 other ends difference connecting triode VT1 base stages, electric capacity C2, resistance R2 and triode VT2 emitter stages,
Triode VT1 emitter stage connecting luminous diode LED1 positive poles, the negative pole of LED 1 connection diode D1 positive poles, two poles
Pipe D1 negative poles connect resistance R4, and the resistance R4 other ends connect respectively the electric capacity C2 other ends, resistance R and ground capacity C1, resistance R7
Other end connecting triode VT3 base stages, triode VT3 grounded emitters, triode VT3 colelctor electrode connecting luminous diode LED2
Negative pole, the positive pole of LED 2 connects respectively the resistance R2 other ends and triode VT2 base stages, and triode VT2 colelctor electrodes connect
Connect output end vo；The triode VT2 is PNP triode；The triode VT1 and triode VT3 is NPN triode.
Operation principle of the present utility model is：Fig. 1 is referred to, after the VCC that switches on power, electric capacity C1 enters charged state,
Now triode VT1, VT2 and VT3 is in cut-off state, after a period of time, after electric capacity C1 charges to a certain extent, and three poles
Pipe VT3 base stages are biased, and triode VT3 switched-on light emitting diodes LED2 are lighted, and triode VT2 is also switched on, at output end vo
There is voltage output, because electric capacity C2 needs that after waiting electric capacity C1 fully charged charged state could be entered, so after a period of time
Afterwards, electric capacity C2 charges to a certain extent, and triode VT1 base stages obtain the conducting of forward-bias transistor VT1, LED 1
Light, now triode VT2 and triode VT3 are still tended to remain on, output end vo still output voltage, now circuit enters
Enter steady-working state, LED 1 is the indicator lamp that circuit enters stable state, and LED 2 is three poles
Pipe VT2 and VT3 loop works status indicator lamp.
In sum, the time delay power circuit that the utility model is indicated with LED, is controlled using multiple triodes, is matched somebody with somebody
Resistor-Capacitor Unit is closed, in rational position LED 1 and LED2 are respectively provided with, once break down, can be by observation
The state of two LED, rapidly finds out fault loop, is convenient for people to carry out maintenance investigation.
Claims (3)
1. it is a kind of with LED indicate time delay power circuit, including resistance R1, LED 1, diode D1, electric capacity C1 and
Triode VT1, it is characterised in that resistance R1 one end difference connecting triode VT1 colelctor electrodes and power supply VCC, resistance R1 are another
One end difference connecting triode VT1 base stages, electric capacity C2, resistance R2 and triode VT2 emitter stages, the connection of triode VT1 emitter stages
The positive pole of LED 1, the negative pole of LED 1 connection diode D1 positive poles, diode D1 negative poles connection resistance R4,
The resistance R4 other ends connect respectively the electric capacity C2 other ends, resistance R and ground capacity C1, resistance R7 other end connecting triode VT3
Base stage, triode VT3 grounded emitters, triode VT3 colelctor electrode connecting luminous diode LED2 negative poles, LED 2
Positive pole connects respectively the resistance R2 other ends and triode VT2 base stages, triode VT2 colelctor electrodes connection output end vo.
2. the time delay power circuit indicated with LED according to claim 1, it is characterised in that the triode VT2 is
PNP triode.
3. it is according to claim 1 with LED indicate time delay power circuit, it is characterised in that the triode VT1 and three
Pole pipe VT3 is NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621254321.5U CN206164389U (en) | 2016-11-19 | 2016-11-19 | Take time delay power supply circuit of LED instruction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621254321.5U CN206164389U (en) | 2016-11-19 | 2016-11-19 | Take time delay power supply circuit of LED instruction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206164389U true CN206164389U (en) | 2017-05-10 |
Family
ID=58660720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621254321.5U Expired - Fee Related CN206164389U (en) | 2016-11-19 | 2016-11-19 | Take time delay power supply circuit of LED instruction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206164389U (en) |
-
2016
- 2016-11-19 CN CN201621254321.5U patent/CN206164389U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20171119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |