CN113395800A - Indicating lamp control circuit - Google Patents
Indicating lamp control circuit Download PDFInfo
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- CN113395800A CN113395800A CN202110742503.6A CN202110742503A CN113395800A CN 113395800 A CN113395800 A CN 113395800A CN 202110742503 A CN202110742503 A CN 202110742503A CN 113395800 A CN113395800 A CN 113395800A
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- control circuit
- resistor
- indicator light
- signal control
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- 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]
- H05B45/30—Driver circuits
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Abstract
The embodiment of the application discloses pilot lamp control circuit includes: the device comprises a signal control end, a first control circuit and a second control circuit; one end of the first control circuit is connected with the power supply, the other end of the first control circuit is connected with the signal control end, one end of the second control circuit is connected with the signal control end, and the other end of the second control circuit is grounded. According to the invention, the first control circuit controls the lighting state of the first indicator lamp according to the power supply and the signal control end, and the second control circuit controls the lighting state of the second indicator lamp according to the signal control end, so that the use of the number of triode devices is reduced, and the corresponding cost and quality risk in hardware design are reduced.
Description
Technical Field
The invention relates to the technical field of control circuits, in particular to an indicator lamp control circuit.
Background
The basic principle of the light emitting diode is that electric energy is converted into light energy, and when a forward voltage is applied to the light emitting diode, holes injected from a P region to an N region and electrons injected from the N region to the P region are respectively recombined with the electrons in the N region and the holes in the P region within a few micrometers near a PN junction to generate spontaneous emission fluorescence.
In the prior art indicator light circuit, the cost and the quality of the product are crucial to the hardware setting, and the risk caused by the larger number of the components is higher, and the cost is increased.
In the prior art, one input/output port (IO port) is used to control 2 LED indicator lamps: one of them LED pilot lamp is direct by IO mouth control, and another LED pilot lamp is through the lamp bright state that a triode is reverse to control the lamp, because the lamp bright state control that needs a triode to realize different LED lamps for can increase corresponding cost and quality risk in the hardware design.
Disclosure of Invention
In order to solve the technical problem, the invention aims to provide an indicator lamp control circuit.
The purpose of the invention is realized by the following technical scheme:
an indicator light control circuit comprising: the device comprises a signal control end, a first control circuit and a second control circuit; one end of the first control circuit is connected with the power supply, the other end of the first control circuit is connected with the signal control end, one end of the second control circuit is connected with the signal control end, and the other end of the second control circuit is grounded.
Further, the first control circuit comprises a first resistor and a first indicator light, wherein the positive pole of the first indicator light is connected with the power supply, and the negative pole of the first indicator light is connected with one end of the first resistor; the other end of the first resistor is connected with the signal control end.
Furthermore, the second control circuit comprises a second resistor and a second indicator light, one end of the second resistor is connected with the signal control end, the other end of the second resistor is connected with the anode of the second indicator light, and the cathode of the second indicator light is grounded.
Furthermore, the first control circuit further comprises a third resistor, one end of the third resistor is connected with the anode of the first indicator light, and the other end of the third resistor is connected with the cathode of the first indicator light.
Furthermore, the second control circuit further comprises a fourth resistor, one end of the fourth resistor is connected with the positive pole of the second indicator light, and the other end of the fourth resistor is connected with the negative pole of the second indicator light.
According to the indicating lamp control circuit, the number of triode devices is reduced, the first control circuit is designed to control the lighting state of the first indicating lamp according to the power supply and the signal control end, the second control circuit controls the lighting state of the second indicating lamp according to the signal control end, and corresponding cost and quality risks in hardware design are reduced.
Drawings
Fig. 1 is a circuit diagram of an indicator lamp control circuit of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Example one
The indicator light control circuit of the invention, as shown in fig. 1, comprises a signal control end, a first control circuit and a second control circuit; one end of the first control circuit is connected with the power supply, the other end of the first control circuit is connected with the signal control end, one end of the second control circuit is connected with the signal control end, and the other end of the second control circuit is grounded. The first control circuit controls the lighting state of the first indicator lamp according to the power supply and the signal control end, and the second control circuit controls the lighting state of the second indicator lamp according to the signal control end.
After the power supply (VDDAD _3.3V) inputs current into the first control circuit, the voltage difference between the power supply and the signal control end (SYS _ LED) is judged, when the voltage difference between the power supply and the signal control end is smaller than or equal to 0, the first control circuit indicates that no current passes through a first indicator lamp (LED1) in the first control circuit, and at the moment, the first control circuit controls the first indicator lamp to be turned off. However, for the second control circuit, a voltage difference exists between the voltage of the signal control end and the ground end, and the voltage difference is greater than 0; when the voltage difference is larger than 0, the second indicating lamp (LED2) in the second control circuit is indicated to have current passing through, and the second control circuit controls the second indicating lamp to emit light.
In the embodiment of the invention, the power supply voltage can be 3.3V, and the voltage value range of the signal control end is more than 5V; the power voltage can be any specific voltage value, and the voltage value range of the signal control end is any specific voltage value larger than 0V.
Further, in a preferred embodiment of the present application, the first control circuit includes a first resistor (RL13) and a first indicator light; the second control circuit includes a second resistor (RL14) and a second indicator light. The positive pole of the first indicator light is connected with the power supply, and the negative pole of the first indicator light is connected with one end of the first resistor; the other end of the first resistor is connected with the signal control end; one end of the second resistor is connected with the signal control end, the other end of the second resistor is connected with the anode of the second indicator light, and the cathode of the second indicator light is grounded.
When the power supply inputs current to the first control circuit, in order to avoid the damage to the first indicator lamp caused by excessive current and use ohm's theorem (U ═ IR), a first resistor is added in the first control circuit to protect the first indicator lamp. When the voltage value of the signal control end is too large different from the voltage value of the ground, in order to reduce the damage of the strong current to the second indicator light, a second resistor is also added in the second control circuit to protect the second indicator light. The first resistor and the second resistor can also be used for limiting current, the brightness of the first indicator light is controlled by adjusting the resistance value of the first resistor, and the brightness of the second indicator light is controlled by adjusting the resistance value of the second resistor. For example, as the principle that increasing the resistance value reduces the current under the same voltage is known, the larger the resistance value of the first resistor is, the smaller the brightness of the first indicator light is; similarly, the larger the resistance of the second resistor is, the lower the brightness of the second indicator light is.
Further, in a preferred embodiment of the present application, the first control circuit further includes a third resistor (RL15), one end of the third resistor is connected to the positive pole of the first indicator light, and the other end of the third resistor is connected to the negative pole of the first indicator light; the second control circuit further comprises a fourth resistor (RL16), one end of the fourth resistor is connected with the anode of the second indicator light, and the other end of the fourth resistor is connected with the cathode of the second indicator light.
In order to reduce the frequency of the situation, in the invention, a third resistor is used as a clamping resistor of the first indicator lamp, and a fourth resistor is used as a clamping resistor of the second indicator lamp to reduce the situation that the first indicator lamp and the second indicator lamp flicker.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (5)
1. An indicator light control circuit, comprising: the device comprises a signal control end, a first control circuit and a second control circuit; one end of the first control circuit is connected with the power supply, the other end of the first control circuit is connected with the signal control end, one end of the second control circuit is connected with the signal control end, and the other end of the second control circuit is grounded.
2. An indicator light control circuit according to claim 1, wherein the first control circuit comprises a first resistor and a first indicator light, the positive pole of the first indicator light is connected to the power supply, and the negative pole of the first indicator light is connected to one end of the first resistor; the other end of the first resistor is connected with the signal control end.
3. The indicator lamp control circuit according to claim 1, wherein the second control circuit comprises a second resistor and a second indicator lamp, one end of the second resistor is connected to the signal control terminal, the other end of the second resistor is connected to the anode of the second indicator lamp, and the cathode of the second indicator lamp is grounded.
4. An indicator light control circuit according to claim 2, wherein the first control circuit further comprises a third resistor, one end of the third resistor is connected to the positive pole of the first indicator light, and the other end of the third resistor is connected to the negative pole of the first indicator light.
5. An indicator light control circuit according to claim 3, wherein the second control circuit further comprises a fourth resistor, one end of the fourth resistor is connected to the positive pole of the second indicator light, and the other end of the fourth resistor is connected to the negative pole of the second indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742503.6A CN113395800A (en) | 2021-07-01 | 2021-07-01 | Indicating lamp control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742503.6A CN113395800A (en) | 2021-07-01 | 2021-07-01 | Indicating lamp control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113395800A true CN113395800A (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110742503.6A Pending CN113395800A (en) | 2021-07-01 | 2021-07-01 | Indicating lamp control circuit |
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| CN (1) | CN113395800A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123543A (en) * | 2010-11-12 | 2011-07-13 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN201928478U (en) * | 2010-10-14 | 2011-08-10 | 康佳集团股份有限公司 | Television indicating lamp control circuit |
| CN206042437U (en) * | 2016-08-19 | 2017-03-22 | 深圳喜乐航科技有限公司 | Pilot lamp system based on audio signal control |
| CN111751757A (en) * | 2020-07-22 | 2020-10-09 | 上海麦腾物联网技术有限公司 | Fault detection circuit and method for vehicle-mounted indicator lamp |
-
2021
- 2021-07-01 CN CN202110742503.6A patent/CN113395800A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928478U (en) * | 2010-10-14 | 2011-08-10 | 康佳集团股份有限公司 | Television indicating lamp control circuit |
| CN102123543A (en) * | 2010-11-12 | 2011-07-13 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN206042437U (en) * | 2016-08-19 | 2017-03-22 | 深圳喜乐航科技有限公司 | Pilot lamp system based on audio signal control |
| CN111751757A (en) * | 2020-07-22 | 2020-10-09 | 上海麦腾物联网技术有限公司 | Fault detection circuit and method for vehicle-mounted indicator lamp |
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Application publication date: 20210914 |
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| RJ01 | Rejection of invention patent application after publication |