CN112423441A - Indicator lamp display circuit of distribution station terminal - Google Patents
Indicator lamp display circuit of distribution station terminal Download PDFInfo
- Publication number
- CN112423441A CN112423441A CN202011498561.0A CN202011498561A CN112423441A CN 112423441 A CN112423441 A CN 112423441A CN 202011498561 A CN202011498561 A CN 202011498561A CN 112423441 A CN112423441 A CN 112423441A
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- display circuit
- ceramic capacitor
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- 239000003985 ceramic capacitor Substances 0.000 claims abstract description 32
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/18—Controlling the light source by remote control via data-bus transmission
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to an indicator lamp display circuit of a terminal of a distribution station, which comprises a main MCU and an IO expansion chip, wherein the main MCU and the IO expansion chip are communicated and interconnected through an I2C bus interface, a ceramic capacitor with the capacitance value of 100pF-1nF is arranged at the input end of an I2C interface of the IO expansion chip, two ceramic capacitors with the capacitance value of 100pF-10nF are respectively arranged at the output end of the IO interface of the IO expansion chip, and the output end of the IO interface of the IO expansion chip is connected with an indicator lamp. The invention does not depend on MCU control, does not increase the terminal cost, and can effectively ensure the operation stability of the system.
Description
Technical Field
The invention relates to an indicator light display circuit, in particular to an indicator light display circuit of a station terminal.
Background
The display system scheme of the station terminal (DTU) equipment of the current power distribution network is basically divided into two schemes: firstly, a small number of indicator lamps are adopted for displaying, and the scheme cannot accurately indicate the working state of field equipment and is not beneficial to system maintenance; and secondly, more indicator lights are controlled by adopting an additional MCU, the cost of the scheme is relatively high, and new unstable factors are added.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provide the indicating lamp display circuit of the terminal of the distribution station, which does not depend on MCU control, does not increase the cost of the terminal and can effectively ensure the operation stability of the system.
The technical scheme is as follows: in order to solve the technical problem, the indicator lamp display circuit of the terminal of the distribution network station comprises a main MCU and an IO expansion chip which are communicated and interconnected through an I2C bus interface, wherein a ceramic capacitor with a capacitance value of 100pF-1nF is arranged at the input end of an I2C interface of the IO expansion chip, two ceramic capacitors with a capacitance value of 100pF-10nF are respectively arranged at the output end of the IO interface of the IO expansion chip, and the output end of the IO interface of the IO expansion chip is connected with an indicator lamp.
Further, the IO expansion chip includes U1, U1 chips, a ceramic capacitor C1 is placed at an input end of an I2 1 interface of the U1 chip, two ceramic capacitors C1 and C1 are placed at an output end of an IO interface of the U1 chip, one end of the ceramic capacitors C1-C1 is grounded, and one end of the IO interface of the U1 chip is connected to a main bus of the MCU1, and the main bus is connected to the MCU1, the IO interface output end of the IO expansion chip is respectively connected with the indicator lamps LED1-LED 64.
Further, the IO extension chip employs NCA 9555.
Further, each of the IO expansion chips may output 16 indication signals.
Further, the indicator light is a phi 5-sized indicator light.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the invention adopts I2C bus to control and display the output of IO port, the external main MCU controls the IO expansion chip in the display system through I2C bus, each chip has independent address, 16 paths of indication signals can be output respectively, U1, U2, U3 and U4 are IO expansion chips NCA9555, I2C bus is connected in parallel to be one path, and the chip communicates with the external main MCU, in order to ensure the signal stability, 1 ceramic capacitor with the capacitance value between 100pF-1nF is arranged at the input end of the I2C interface; in addition, in order to prevent the influence of electrostatic interference on the indicator lamp, 2 ceramic capacitors with the capacitance value of 100pF-10nF are respectively placed at the output end of the IO port of the chip, and the LEDs 1-LED64 are indicator lamps with the size of phi 5; display system directly receives station terminal owner MCU control, has guaranteed the stability of display circuit operation, adopts I2C bus control, can realize the high efficiency of pilot lamp control to effectively reduce external disturbance's influence, adopt IO mouth extension chip, improved display system's anti-static interference performance, I2C interface and IO mouth design filter capacitor on-line, the effectual electrostatic interference that has prevented.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, the indicator light display circuit of a distribution network station terminal according to the present invention includes a main MCU1 and an IO expansion chip 2, which are communicatively interconnected via an I2C bus interface, the IO expansion chip 2 employs NCA9555, the IO expansion chip 2 includes U1, U2, U3 and U4 chips, each of the IO expansion chips 2 can output 16 indication signals, a ceramic capacitor C1 is disposed at an I2C interface input end of the U1 chip, a ceramic capacitor C2 is disposed at an I2C interface input end of the U2 chip I2C, a ceramic capacitor C3 is disposed at an I2C interface input end of the U3 chip I2C, a ceramic capacitor C4 is disposed at an I2C interface input end of the U4 chip, two ceramic capacitors C1 and C1 are disposed at an IO interface output end of the U1 chip, two ceramic capacitors C1 and two IO capacitors C1 are disposed at an IO interface output end of the U1 and two IO capacitors C1 and C1 are disposed at an IO output end of the U1, two ceramic capacitors C11 and C12 are placed at the IO interface output end of the U4 chip, one ends of the ceramic capacitors C1-C4 are grounded, the I2C bus interfaces of the IO expansion chip 2 are connected in parallel into one path and then connected to the main MCU1, one ends of the ceramic capacitors C5-C12 are grounded, the IO interface output end of the IO expansion chip 2 is respectively connected with indicator lamps LED1-LED64, the indicator lamps are phi 5 indicator lamps, and the capacitance value of the C1-C12 is 100pF-1 nF. The invention adopts I2C bus to control and display the output of IO port, the external main MCU controls the IO expansion chip in the display system through I2C bus, each chip has independent address, 16 paths of indication signals can be output respectively, U1, U2, U3 and U4 are IO expansion chips NCA9555, I2C bus is connected in parallel to be one path, and the chip communicates with the external main MCU, in order to ensure the signal stability, 1 ceramic capacitor with the capacitance value between 100pF-1nF is arranged at the input end of the I2C interface; in addition, in order to prevent the influence of electrostatic interference on the indicator lamp, 2 ceramic capacitors with the capacitance value of 100pF-10nF are respectively placed at the output end of the IO port of the chip, and the LEDs 1-LED64 are indicator lamps with the size of phi 5; display system directly receives station terminal owner MCU control, has guaranteed the stability of display circuit operation, adopts I2C bus control, can realize the high efficiency of pilot lamp control to effectively reduce external disturbance's influence, adopt IO mouth extension chip, improved display system's anti-static interference performance, I2C interface and IO mouth design filter capacitor on-line, the effectual electrostatic interference that has prevented.
The present invention provides a thought and a method, and a method and a way for implementing the technical scheme are many, the above is only a preferred embodiment of the present invention, it should be noted that, for a person skilled in the art, a plurality of improvements and modifications can be made without departing from the principle of the present invention, and the improvements and modifications should be regarded as the protection scope of the present invention, and each component not explicitly described in the embodiment can be implemented by the prior art.
Claims (5)
1. The utility model provides an indicator lamp display circuit at distribution station terminal which characterized in that: the intelligent display device comprises a main MCU (1) and an IO extension chip (2), which are communicated and interconnected through an I2C bus interface, wherein a ceramic capacitor with a capacitance value between 100pF and 1nF is placed at the input end of an I2C interface of the IO extension chip (2), two ceramic capacitors with a capacitance value between 100pF and 10nF are respectively placed at the output end of an IO interface of the IO extension chip (2), and the output end of the IO interface of the IO extension chip (2) is connected with an indicator lamp.
2. The indicator light display circuit of a distribution site terminal according to claim 1, characterized in that: the IO expansion chip (2) comprises U1, U2, U3 and U4 chips, wherein a ceramic capacitor C1 is placed at the I2C interface input end of the U1 chip, a ceramic capacitor C2 is placed at the I2C interface input end of the U2 chip, a ceramic capacitor C3 is placed at the I2C interface input end of the U3 chip, a ceramic capacitor C4 is placed at the I2C interface input end of the U4 chip, two ceramic capacitors C5 and C6 are placed at the IO interface output end of the U1 chip, two ceramic capacitors C7 and C8 are placed at the IO interface output end of the U2 chip, two ceramic capacitors C9 and C10 are placed at the IO interface output end of the U3 chip, two ceramic capacitors C11 and C12 are placed at the IO interface output end of the U4 chip, one end of the ceramic capacitors C1-C4 is grounded, and one main IO interface 2C of the expansion chip is connected to a main bus (3891), one end of each ceramic capacitor C5-C12 is grounded, and the IO interface output end of the IO expansion chip (2) is connected with the indicator lamps LED1-LED64 respectively.
3. The indicator light display circuit of a distribution site terminal according to claim 1, characterized in that: the IO expansion chip (2) adopts NCA 9555.
4. The indicator light display circuit of a distribution site terminal according to claim 1, characterized in that: each of the IO extension chips (2) can output 16 paths of indication signals.
5. The indicator light display circuit of a distribution site terminal according to claim 1, characterized in that: the indicator light is a phi 5-size indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011498561.0A CN112423441A (en) | 2020-12-17 | 2020-12-17 | Indicator lamp display circuit of distribution station terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011498561.0A CN112423441A (en) | 2020-12-17 | 2020-12-17 | Indicator lamp display circuit of distribution station terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112423441A true CN112423441A (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011498561.0A Pending CN112423441A (en) | 2020-12-17 | 2020-12-17 | Indicator lamp display circuit of distribution station terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112423441A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453663A (en) * | 2008-12-30 | 2009-06-10 | 常州津通超维视频技术有限公司 | Circuit for controlling tridimensional grating by I2C bus |
| CN105321306A (en) * | 2014-07-28 | 2016-02-10 | 王大刚 | IIC extended IO port-based alarm module circuit |
| CN108235512A (en) * | 2018-01-03 | 2018-06-29 | 深圳创维－Rgb电子有限公司 | A kind of electrical equipment, audible spectrum display circuit and its control method |
| CN108279601A (en) * | 2018-01-26 | 2018-07-13 | 武汉理工大学 | A kind of multi-channel digital TT＆C system based on I2C+CAN buses |
| CN109582629A (en) * | 2018-12-17 | 2019-04-05 | 恒银金融科技股份有限公司 | The telecommunication circuit of MCU and multi-disc EEPROM in a kind of electronic product |
-
2020
- 2020-12-17 CN CN202011498561.0A patent/CN112423441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453663A (en) * | 2008-12-30 | 2009-06-10 | 常州津通超维视频技术有限公司 | Circuit for controlling tridimensional grating by I2C bus |
| CN105321306A (en) * | 2014-07-28 | 2016-02-10 | 王大刚 | IIC extended IO port-based alarm module circuit |
| CN108235512A (en) * | 2018-01-03 | 2018-06-29 | 深圳创维－Rgb电子有限公司 | A kind of electrical equipment, audible spectrum display circuit and its control method |
| CN108279601A (en) * | 2018-01-26 | 2018-07-13 | 武汉理工大学 | A kind of multi-channel digital TT＆C system based on I2C+CAN buses |
| CN109582629A (en) * | 2018-12-17 | 2019-04-05 | 恒银金融科技股份有限公司 | The telecommunication circuit of MCU and multi-disc EEPROM in a kind of electronic product |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 214200 building 57, No. 489, Lvyuan Road, Xinjie street, Yixing City, Wuxi City, Jiangsu Province Applicant after: Jiangsu Mige Electric Group Co.,Ltd. Address before: 214200 building 57, No. 489, Lvyuan Road, Xinjie street, Yixing City, Wuxi City, Jiangsu Province Applicant before: MIGO ELECTRIC JIANGSU CO.,LTD. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |