CN103344802B - A kind of Novel electric quantity display circuit - Google Patents
A kind of Novel electric quantity display circuit Download PDFInfo
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- CN103344802B CN103344802B CN201310262167.0A CN201310262167A CN103344802B CN 103344802 B CN103344802 B CN 103344802B CN 201310262167 A CN201310262167 A CN 201310262167A CN 103344802 B CN103344802 B CN 103344802B
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- driving circuit
- led segment
- segment code
- battery capacity
- capacity indication
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Abstract
The present invention discloses a kind of Novel electric quantity display circuit, comprise: ten shift counter U1, first, second LED segment code driving circuit U2, U3 and ten section code battery capacity indication unit U4, the input terminus of five output terminal OUTPUT0 ~ OUTPUT4 and the first LED segment code driving circuit U2 of described ten shift counter U1 connects, and the input terminus of another five output terminal OUTPUT5 ~ OUTPUT9 and the 2nd LED segment code driving circuit U3 connects; Output terminal and ten section code battery capacity indication unit U4 of the first LED segment code driving circuit U2 connect, and the output terminal of the 2nd LED segment code driving circuit U3 also with ten section code battery capacity indication unit U4 connect. The Novel electric quantity display circuit Zhi Xu mono-tunnel control signal STA of the present invention, so that it may to control the instruction of electricity meter, greatly save system resource, and circuit structure is relatively simple, display precision height.
Description
Technical field
The present invention relates to a kind of display circuit, especially a kind of Novel electric quantity display circuit.
Background technology
Power truck fast development in recent years, for power truck, battery is its gordian technique, the instruction of battery dump energy tells how far driving person can also start, the structure comparison of current electric quantity display circuit is complicated, display precision is not high, have impact on the judgement of power truck officer, cause electricity waste and to travelling distance estimations mistake.
Summary of the invention
The above-mentioned technical problem existed to solve in prior art, the present invention provides a kind of Novel electric quantity display circuit, comprise: ten shift counter U1, first, second LED segment code driving circuit U2, U3 and ten section code battery capacity indication unit U4, the input terminus of five output terminal OUTPUT0 ~ OUTPUT4 and the first LED segment code driving circuit U2 of described ten shift counter U1 connects, and the input terminus of another five output terminal OUTPUT5 ~ OUTPUT9 and the 2nd LED segment code driving circuit U3 connects; Output terminal and ten section code battery capacity indication unit U4 of the first LED segment code driving circuit U2 connect, and the output terminal of the 2nd LED segment code driving circuit U3 also with ten section code battery capacity indication unit U4 connect.
Further, input signal STA controls battery capacity indication, and wherein a-road-through crosses resistance R1, it is input to 14 pin of U1, thering is provided clocksignal to U1, another two-way is input to the first LED segment code driving circuit U2 by resistance R3, R4 respectively, control PNP triode and offer reset signal.
Further, the reset signal RESET of described ten shift counter U1 is provided by 10 pin of U2.
Further, described ten shift counter U1 are CD4017 chip.
Further, described first, second LED segment code driving circuit U2, U3 are ULN2003 chip.
Further, described ten section code battery capacity indication unit U4 are in series by 10 photodiodes.
Further, 16 pin of described first LED segment code driving circuit U2 are connected with ten section code battery capacity indication unit U4 after triode Q1.
The Novel electric quantity display circuit Zhi Xu mono-tunnel control signal STA of the present invention, so that it may to control the instruction of electricity meter, greatly save system resource, and circuit structure is relatively simple, display precision height.
Accompanying drawing explanation
Fig. 1 is the Novel electric quantity display circuit figure of the present invention;
Fig. 2 is the structural representation of ten section code battery capacity indication unit panels.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As illustrated in fig. 1 and 2, the Novel electric quantity display circuit of the present invention comprises: ten shift counter U1, LED segment code driving circuit U2, U3 and ten section code battery capacity indication unit U4, STA is input signal, control battery capacity indication, STA a-road-through crosses resistance R1,14 pin being input to U1, provide clocksignal to U1. Two-way is respectively by resistance R3 and R4 in addition, is input to U2, control PNP triode and offer reset signal. RESET is the reset signal of U1, and high level resets, and this signal is provided by 10 pin of U2. Ten shift counter U1 are CD4017 chip, and LED segment code driving circuit U2, U3 are ULN2003 chip.
When the 15 pin RESET of U1 are high level, chip reset, now exports OUTPUT0 ~ OUTPUT9 and resets, export lower level, and OUTPUT0 exports high level. When RESET is lower level, chip normal operation. When STA signal is high by low change, namely producing a positive rise, now, the OUTPUT0 of U1 exports and becomes low, and OUTPUT1 becomes high, and during the next positive rise of STA signal, OUTPUT1 becomes low, and OUTPUT2 becomes height. When the 9th positive rise of STA signal comes, OUTPUT9 becomes high, and all the other output pins export lower level. U2, U3 are LED segment code driving circuit, and B is input, and C is for exporting. When being input as high level, export low, when being input as lower level, output open circuit. U4 is ten section code battery capacity indication unit, 10 photodiode series connection. When triode Q1 opens, when any one of U4 is input as lower level, corresponding diode is bright. Such as, 3 pin of U4 are lower level, and now electric current is by resistance R7, triode Q1, and U4 3 photodiodes topmost in Fig. 1. Fig. 2 is shown in the display of battery capacity indication unit panel, and section code 1,2,3 is lighted, and all the other extinguish.
When STA signal is lower level, 10 pin of driving circuit U2,16 pin output open circuits. Now triode Q1 turns off, U4 non-transformer, and therefore electricity meter each section of code extinguishes; The 16 pin RESET of U1 are high, U1 chip reset. When STA signal is high by low change, 10 pin of U2,16 pin export as lower level. Now triode Q1 conducting, RESET becomes low, and chip U1 works, and OUTPUT0 exports height, and all the other export lower level; 15 pin of U2 export lower levels, therefore electric current by resistance R7, triode Q1 and and Fig. 1 in U4 1 photodiode topmost, LED1 lights. When the next positive rise of STA signal arrives, the OUTPU1 of U1 exports as high level, and all the other outputs are low. Now light photodiode 1 and 2. Owing to the low duration of the positive rise of STA signal is very short, the 10 pin output open circuit times of U2 are also very short, and now VCC is charged to electric capacity C1 by resistance R2, and RESET voltage raises. When RESET voltage does not also reach reset voltage, STA signal turns into high level, and RESET is pulled to again original lower level. When STA signal keeps enough lower levels, RESET signal turns into high level, and chip U1 resets, and triode Q1 turns off, and 10 section code battery capacity indication unit U4 extinguish entirely simultaneously.
Claims (1)
1. an electric quantity display circuit, comprise: ten shift counter U1, the first LED segment code driving circuit U2, the 2nd LED segment code driving circuit U3 and ten section code battery capacity indication unit U4, it is characterized in that: the input terminus of five output terminal OUTPUT0 ~ OUTPUT4 and the first LED segment code driving circuit U2 of described ten shift counter U1 connects, the input terminus of another five output terminal OUTPUT5 ~ OUTPUT9 and the 2nd LED segment code driving circuit U3 connects; Output terminal and ten section code battery capacity indication unit U4 of the first LED segment code driving circuit U2 connect, and the output terminal of the 2nd LED segment code driving circuit U3 also with ten section code battery capacity indication unit U4 connect; Described ten shift counter U1 are CD4017 chip; Described first LED segment code driving circuit U2 and the 2nd LED segment code driving circuit U3 is ULN2003 chip; Input signal STA controls battery capacity indication, and wherein a-road-through crosses resistance R1, is input to 14 pin of U1, provides clocksignal to U1, and another two-way is input to the first LED segment code driving circuit U2 by resistance R3, R4 respectively, control PNP triode and offer reset signal; Described ten section code battery capacity indication unit U4 are in series by 10 photodiodes; The reset signal RESET of described ten shift counter U1 is provided by 10 pin of U2; 16 pin of described first LED segment code driving circuit U2 are connected with ten section code battery capacity indication unit U4 after triode Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310262167.0A CN103344802B (en) | 2013-06-27 | 2013-06-27 | A kind of Novel electric quantity display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310262167.0A CN103344802B (en) | 2013-06-27 | 2013-06-27 | A kind of Novel electric quantity display circuit |
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| Publication Number | Publication Date |
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| CN103344802A CN103344802A (en) | 2013-10-09 |
| CN103344802B true CN103344802B (en) | 2016-06-01 |
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| CN201310262167.0A Active CN103344802B (en) | 2013-06-27 | 2013-06-27 | A kind of Novel electric quantity display circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111366851A (en) * | 2020-04-17 | 2020-07-03 | 佛山职业技术学院 | High-precision battery electric quantity indication method, battery and storage medium |
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