CN208462110U - A kind of high brightening circuit of low level indicator light - Google Patents
A kind of high brightening circuit of low level indicator light Download PDFInfo
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- CN208462110U CN208462110U CN201821156220.3U CN201821156220U CN208462110U CN 208462110 U CN208462110 U CN 208462110U CN 201821156220 U CN201821156220 U CN 201821156220U CN 208462110 U CN208462110 U CN 208462110U
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- pnp triode
- resistance
- capacitor
- led1
- low level
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Abstract
The utility model discloses a kind of low level high brightening circuits of indicator light, including LED1, PNP triode Q2, resistance R3, PNP triode Q4, resistance R5 and capacitor C6；The base stage of the PNP triode Q4 is accessed the low imput of CPU, the grounded collector of PNP triode Q4, and the collector of PNP triode Q4 by resistance R5 and connects capacitor C6 anode；Capacitor C6 cathode accesses the emitter of PNP triode Q4, and capacitor C6 cathode accesses the base stage of PNP triode Q2 by resistance R3, and the emitter of PNP triode Q2 accesses power supply, and the collector of PNP triode Q2 connects the one end LED1, LED1 other end ground connection.
Description
Technical field
The utility model relates to indicator light control technology field, specially a kind of high brightening circuit of low level indicator light.
Background technique
On data acquisition equipment, design LED light is respectively used to instruction power supply, system operation, serial ports transmitting-receiving, net
The working condition of mouth, usb, SD card etc., the general high-brightness LED lamp for selecting the green three kinds of colors of reddish yellow, electric current 20mA, voltage 3.3V.
But CPU default output electric current is 10mA, can be shone in a manner of highlighted to meet LED light, and prevent from shining under reduced-current
Unstable, we use new circuit design on lamp plate design scheme.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of high brightening circuit of low level indicator light, solves
At present in the case where CPU defaults output reduced-current, indicator lamp brightness is inadequate, and the unstable problem that shines.
To achieve the above object, the utility model provides the following technical solutions: a kind of low level high brightening circuit of indicator light,
Including LED1, PNP triode Q2, resistance R3, PNP triode Q4, resistance R5 and capacitor C6；The base stage of the PNP triode Q4
The low imput of CPU, the grounded collector of PNP triode Q4, and the current collection of PNP triode Q4 are accessed by resistance R5
Pole connects capacitor C6 anode；Capacitor C6 cathode accesses the emitter of PNP triode Q4, and capacitor C6 cathode is accessed by resistance R3
The base stage of PNP triode Q2, the emitter of PNP triode Q2 access power supply, and the collector of PNP triode Q2 connects LED1 mono-
End, LED1 other end ground connection.
Preferably, the low imput of the CPU is 10mA, resistance R5 is 4.7K Ω, and capacitor is 3.3 μ F, electricity
Resistance R3 is 4.7K Ω, LED1 3.3V, power supply 3V3.
The utility model has the beneficial effects that meeting LED light can be steadily with highlighted side in the case where CPU exports low-current case
Formula shines.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
As shown in Figure 1, a kind of high brightening circuit of low level indicator light, including LED1, PNP triode Q2, resistance R3, PNP
Triode Q4, resistance R5 and capacitor C6；The base stage of the PNP triode Q4 inputs letter by the low level that resistance R5 accesses CPU
Number, the grounded collector of PNP triode Q4, but the collector of PNP triode Q4 connects capacitor C6 anode；The access of capacitor C6 cathode
The emitter of PNP triode Q4, but capacitor C6 cathode accesses the base stage of PNP triode Q2 by resistance R3, PNP triode Q2's
Emitter accesses power supply, and the collector of PNP triode Q2 connects the one end LED1, LED1 other end ground connection.The low level of the CPU
Input signal is 10mA, and resistance R5 is 4.7K Ω, and capacitor is 3.3 μ F, and resistance R3 is 4.7K Ω, LED1 3.3V, and power supply is
3V3。
The resistance R5 of the utility model exports low-key usually for configuring PNP triode Q4 base voltage, CPU, tri- pole PNP
Pipe Q4 conducting, capacitor C6 realize energy storage, the time bright for stability contorting lamp, while resistance R3 for configuring PNP triode Q2
Base voltage, and PNP triode Q2 receives low-key and puts down, PNP triode Q2 conducting, so that 3.3V power supply is conducting to the end LED,
The end 3.3VLED high-brightness luminous.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modification, equivalent replacement or improvement etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (2)
1. a kind of high brightening circuit of low level indicator light, which is characterized in that including LED1, PNP triode Q2, resistance R3, PNP tri-
Pole pipe Q4, resistance R5 and capacitor C6；
The base stage of the PNP triode Q4 accesses the low imput of CPU, the current collection of PNP triode Q4 by resistance R5
Pole ground connection, but the collector of PNP triode Q4 connects capacitor C6 anode, and capacitor C6 cathode accesses the emitter of PNP triode Q4, again
Capacitor C6 cathode accesses the base stage of PNP triode Q2 by resistance R3, and the emitter of PNP triode Q2 accesses power supply, tri- pole PNP
The collector of pipe Q2 connects the one end LED1, LED1 other end ground connection.
2. a kind of high brightening circuit of low level indicator light according to claim 1, which is characterized in that the low level of the CPU
Input signal is 10mA, and resistance R5 is 4.7K Ω, and capacitor is 3.3 μ F, and resistance R3 is 4.7K Ω, LED1 3.3V, and power supply is
3V3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821156220.3U CN208462110U (en) | 2018-07-20 | 2018-07-20 | A kind of high brightening circuit of low level indicator light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821156220.3U CN208462110U (en) | 2018-07-20 | 2018-07-20 | A kind of high brightening circuit of low level indicator light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208462110U true CN208462110U (en) | 2019-02-01 |
Family
ID=65179875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821156220.3U Active CN208462110U (en) | 2018-07-20 | 2018-07-20 | A kind of high brightening circuit of low level indicator light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208462110U (en) |
-
2018
- 2018-07-20 CN CN201821156220.3U patent/CN208462110U/en active Active
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