CN207427536U - The control circuit that single wire control bi-colour light is shown - Google Patents
The control circuit that single wire control bi-colour light is shown Download PDFInfo
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- CN207427536U CN207427536U CN201721560939.9U CN201721560939U CN207427536U CN 207427536 U CN207427536 U CN 207427536U CN 201721560939 U CN201721560939 U CN 201721560939U CN 207427536 U CN207427536 U CN 207427536U
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- colour light
- phase inverter
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Abstract
The utility model discloses the control circuits that a kind of single wire control bi-colour light is shown, including bi-colour light, current-limiting resistance R1, R2, phase inverter U1, the LED1 parts of wherein bi-colour light are connected with current-limiting resistance R1 to be followed by between GPIO signal input parts and ground, the LED2 parts of bi-colour light are connected with current-limiting resistance R2 to be followed by between the output terminal and ground of phase inverter U1, and the input terminal of phase inverter U1 connects same GPIO signal input parts.The utility model realizes that GPIO port controls bi-colour light by phase inverter, and during GPIO output high level or when low level lights the lamp of different colours, achievees the effect that save GPIO port, greatly improves the utilization rate of GPIO port.
Description
Technical field
The utility model belongs to display control circuit field, and in particular to the control electricity that a kind of single wire control bi-colour light is shown
Road.
Background technology
At present for various communication products, it is essential that LED, which is shown, but for managed switches,
GPIO (General-Purpose Input/Output) port requirements are too many, completely inadequate in the GPIO port of CPU bands in itself
In the case of, cost can greatly be increased again by increasing expansion GPIO, and at this time the importance of the utilization rate of GPIO port is with regard to body
Reveal and.
At present, normal LED bi-colour lights design is divided into serial and doubling two ways, is all that 2 lines is needed (to need two
GPIO port) realize lighting, greatly reduce the utilization rate of port.
Utility model content
The utility model technical issues that need to address are to provide a kind of simple in structure, and single wire control easy to control is double-colored
The control circuit that lamp is shown.
To solve the above problems, technical solution adopted in the utility model is:
The control circuit that a kind of single wire control bi-colour light is shown, including bi-colour light, current-limiting resistance R1, R2, phase inverter U1,
The LED1 parts of middle bi-colour light are connected with current-limiting resistance R1 to be followed by between GPIO signal input parts and ground, the LED2 portions of bi-colour light
Divide to connect with current-limiting resistance R2 and be followed by between the output terminal and ground of phase inverter U1, the input terminal of phase inverter U1 connects same GPIO
Signal input part.
Further, the phase inverter U1 is the 74LVC1G04GW chips using SOT353 encapsulation.
It is using advantageous effect caused by above-mentioned technical proposal:The utility model realizes a GPIO by phase inverter
Port controlling bi-colour light, during GPIO output high level or when low level, lights the lamp of different colours, reaches and saves GPIO port
Effect greatly improves the utilization rate of GPIO port.
Description of the drawings
Fig. 1 is the utility model circuit diagram.
Specific embodiment
Utility model is described in further detail below in conjunction with the accompanying drawings:
As shown in Figure 1, the utility model include bi-colour light, current-limiting resistance R1, R2, phase inverter U1's, wherein bi-colour light
LED1 connects part with current-limiting resistance R1 to be followed by between GPIO signal input parts and ground, LED2 parts and the current limliting electricity of bi-colour light
Resistance R2 series connection is followed by between the output terminal and ground of phase inverter U1, and the input terminal of phase inverter U1 connects same GPIO signals input
End.When GPIO signal output high level, the LED1 parts that high level signal directly drives bi-colour light are lighted, at this time due to phase inverter
The effect of U1,4 foot of the output terminal output low level of phase inverter U1, the LED2 parts of bi-colour light do not work;When GPIO signal outputs are low
Level, the LED1 parts of bi-colour light do not work, at this time due to the effect of phase inverter U1, the high electricity of 4 foot of output terminal output of phase inverter U1
Flat, the LED2 parts of bi-colour light are lighted.
To save circuit board space, the phase inverter U1 uses the 74LVC1G04GW chips of SOT353 encapsulation.
The characteristic of the utility model flexible utilization phase inverter realizes the display of 1 GPIO mouthfuls of control bi-colour light, reaches saving
The effect of GPIO port.
Claims (2)
1. a kind of control circuit that single wire control bi-colour light is shown, it is characterised in that:Including bi-colour light, current-limiting resistance R1, R2, instead
The LED1 parts of phase device U1, wherein bi-colour light are connected with current-limiting resistance R1 to be followed by between GPIO signal input parts and ground, double-colored
The LED2 parts of lamp are connected with current-limiting resistance R2 to be followed by between the output terminal and ground of phase inverter U1, and the input terminal of phase inverter U1 connects
Connect same GPIO signal input parts.
2. the control circuit that single wire control bi-colour light according to claim 1 is shown, it is characterised in that the phase inverter U1
It is the 74LVC1G04GW chips using SOT353 encapsulation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721560939.9U CN207427536U (en) | 2017-11-21 | 2017-11-21 | The control circuit that single wire control bi-colour light is shown |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721560939.9U CN207427536U (en) | 2017-11-21 | 2017-11-21 | The control circuit that single wire control bi-colour light is shown |
Publications (1)
Publication Number | Publication Date |
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CN207427536U true CN207427536U (en) | 2018-05-29 |
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Family Applications (1)
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CN201721560939.9U Active CN207427536U (en) | 2017-11-21 | 2017-11-21 | The control circuit that single wire control bi-colour light is shown |
Country Status (1)
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CN (1) | CN207427536U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110290619A (en) * | 2019-07-19 | 2019-09-27 | 苏州浪潮智能科技有限公司 | A kind of port status display circuit of HBA board and board |
-
2017
- 2017-11-21 CN CN201721560939.9U patent/CN207427536U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110290619A (en) * | 2019-07-19 | 2019-09-27 | 苏州浪潮智能科技有限公司 | A kind of port status display circuit of HBA board and board |
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