CN215300984U - Display circuit for controlling three symbol lamps by two signals of instrument - Google Patents
Display circuit for controlling three symbol lamps by two signals of instrument Download PDFInfo
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- CN215300984U CN215300984U CN202120828811.6U CN202120828811U CN215300984U CN 215300984 U CN215300984 U CN 215300984U CN 202120828811 U CN202120828811 U CN 202120828811U CN 215300984 U CN215300984 U CN 215300984U
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Abstract
The invention discloses a display circuit for controlling three symbol lamps by two paths of signals of an instrument, which comprises an L1 lamp branch, an L2 lamp branch and an L3 lamp branch; the L1 lamp branch comprises a triode T1, the base electrode of the T1 is connected with the signal input end of the L1, the emitter electrode of the T1 is grounded, the collector electrode of the T1 is connected with the L1 lamp, the L1 lamp is connected with the storage battery, and a diode D1 is connected between the L1 lamp and the storage battery in parallel; the L2 lamp branch comprises a triode T2, the base electrode of the T2 is connected with the signal input end of the L2, the emitter electrode of the T2 is grounded, the collector electrode of the T2 is connected with the L2 lamp, the L2 lamp is connected with the storage battery, and a diode D2 is connected between the L2 lamp and the storage battery in parallel; the L3 lamp branch comprises a triode T3 and a triode T4, the base electrode of the T3 is connected with the signal input end of the L1, the collector electrode of the T3 is connected with the L3 lamp, and the L3 lamp is connected with the storage battery; the base of T4 is connected with the signal input end of L2, the emitter of T4 is grounded, and the emitter of T3 is connected with the collector of T4; the L1, L2 and L3 lamps are light emitting diodes. The circuit has the characteristic of controlling the display states of three symbol lamps through two ports.
Description
Technical Field
The invention relates to the technical field of automobile circuits, in particular to a display circuit for controlling three symbol lamps by two paths of signals of an instrument.
Background
At present, more and more functions are integrated on the automobile instrument, particularly in a newly developed instrument, most ports are used as communication, detection or driving ports and are controlled by software, the number of the ports is not enough, and the problem frequently occurs.
In view of the above problems, the present invention provides a circuit for displaying three symbol lamps controlled by two signals of an instrument.
Disclosure of Invention
The invention provides a display circuit for controlling three symbol lamps by two paths of signals of an instrument, which has the characteristic of controlling the display states of the three symbol lamps through two ports; specifically, the invention is realized by the following technical scheme:
a display circuit for controlling three symbol lamps by two signals of an instrument comprises an L1 lamp branch, an L2 lamp branch and an L3 lamp branch; the L1 lamp branch comprises a triode T1, the base electrode of the triode T1 is connected with the signal input end of the L1, the emitter electrode of the triode T1 is grounded, the collector electrode of the triode T1 is connected with the L1 lamp, the L1 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, the cathode of the light-emitting diode is connected with the triode T1, and a diode D1 is connected between the L1 lamp and the storage battery in parallel;
the L2 lamp branch comprises a triode T2, the base electrode of the triode T2 is connected with the signal input end of the L2, the emitter electrode of the triode T2 is grounded, the collector electrode of the triode T2 is connected with the L2 lamp, the L2 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, the cathode of the light-emitting diode is connected with the triode T2, and a diode D2 is connected between the L2 lamp and the storage battery in parallel;
the L3 lamp branch comprises a triode T3 and a triode T4, the base electrode of the triode T3 is connected with the signal input end of the L1, the collector electrode of the triode T3 is connected with the L3 lamp, the L3 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, and the cathode of the light-emitting diode is connected with the triode T3; the base of the transistor T4 is connected to the signal input terminal L2, the emitter of the transistor T4 is grounded, and the emitter of the transistor T3 is connected to the collector of the transistor T4.
Further, the L1 signal input terminal and the L2 signal input terminal are controlled by a high level signal (5V/3.3V).
In the branch of the L1 lamp, a resistor R1 is connected in series between the L1 lamp and the storage battery.
In the branch of the L2 lamp, a resistor R2 is connected in series between the L2 lamp and the storage battery.
In the branch of the L3 lamp, a resistor R3 is connected in series between the L3 lamp and the storage battery.
Further, the voltage of the positive electrode of the battery was 12V.
The beneficial effects of the utility model reside in that:
in the circuit, when an L1 lamp signal is input only at the input end of an L1 signal, an L1 lamp circuit turns on an L1 lamp through a T1 triode, and L1 lamp lighting is realized.
When the L2 lamp signal is input only at the L2 signal input end, the L2 lamp circuit turns on the L2 lamp through the T2 triode, and L2 lamp lighting is realized.
The L1 lamp or the L2 lamp signal is output independently, and due to the existence of the T3 and the T4 triodes, the L3 lamp circuit cannot be switched on, and the L3 lamp does not light.
When the signals of L1 and L2 are input, the voltage difference between two ends of the L1 lamp and the L2 lamp is the diode voltage drop of D1 and D2 due to the existence of D1 and D2 diodes in the circuit of the L1 lamp and the L2 lamp, the voltage drop is about 0.7V, the electromotive force cannot drive the L1 lamp and the L2 lamp to be lightened, the T3 and T4 triodes connected with the branch lines of L1 and L2 in parallel are switched on, and the L3 lamp is lightened.
The display states of the three symbol lamps are controlled by inputting signals of the two ports, the problem that the number of I/O ports of the automobile instrument is not enough can be partially solved, for the scheme that two or three communication ports are not enough, the MCU scheme does not need to be upgraded, the hardware cost is reduced, and the performance level of the instrument is guaranteed not to be reduced.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a display circuit for controlling three symbol lamps by two signals of an instrument according to the present invention.
Wherein: 1, L1 lamp branch; an L2 lamp branch; l3 lamp branch.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, a circuit for displaying three symbol lamps controlled by two signals of an instrument comprises an L1 lamp branch 1, an L2 lamp branch 2 and an L3 lamp branch 3; the L1 lamp branch 1 comprises a triode T1, the base of the triode T1 is connected with a L1 signal input end, the emitter of the triode T1 is grounded, the collector of the triode T1 is connected with an L1 lamp, the L1 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a resistor R1, the cathode of the light-emitting diode is connected with a triode T1, a resistor R1 is connected with the anode of a storage battery, and a diode D1 is connected between the L1 lamp and a resistor R1 in parallel.
The L2 lamp branch 2 comprises a triode T2, the base electrode of the triode T2 is connected with the signal input end of the L2, the emitter electrode of the triode T2 is grounded, the collector electrode of the triode T2 is connected with the L2 lamp, the L2 lamp is a light-emitting diode, the positive electrode of the light-emitting diode is connected with a resistor R2, the negative electrode of the light-emitting diode is connected with a triode T2, a resistor R2 is connected with the positive electrode of a storage battery, and a diode D2 is connected between the L2 lamp and the resistor R2 in parallel.
The triode T4 is connected with the base of the triode T2 in parallel, the base of the triode T4 is connected with the signal input end of the L2, and the emitter of the triode T4 is grounded.
The emitter of the transistor T3 is connected to the collector of the transistor T4.
The L1 signal input end and the L2 signal input end are controlled by a high level signal (5V/3.3V), and can also be controlled by an MCU (microprogrammed control unit) to output the high level signal; the voltage of the positive electrode of the storage battery is 12V.
When the L1 lamp signal is input only at the L1 signal input end, the L1 lamp circuit turns on the L1 lamp through the T1 triode, and L1 lamp lighting is realized.
When the L2 lamp signal is input only at the L2 signal input end, the L2 lamp circuit turns on the L2 lamp through the T2 triode, and L2 lamp lighting is realized.
The L1 lamp or the L2 lamp signal is output independently, and due to the existence of the T3 and the T4 triodes, the L3 lamp circuit cannot be switched on, and the L3 lamp does not light.
When the signals of L1 and L2 are input, the voltage difference between two ends of the L1 lamp and the L2 lamp is the diode voltage drop of D1 and D2 due to the existence of D1 and D2 diodes in the circuit of the L1 lamp and the L2 lamp, the voltage drop is about 0.7V, the electromotive force cannot drive the L1 lamp and the L2 lamp to be lightened, the T3 and T4 triodes connected with the branch lines of L1 and L2 in parallel are switched on, and the L3 lamp is lightened.
The above is the preferred embodiment of the present invention, and several other simple substitutions and modifications made on the premise of the inventive concept should be considered as falling into the protection scope of the present invention.
Claims (6)
1. The utility model provides a two way signal control three symbol lamp display circuit of instrument which characterized in that: comprises an L1 lamp branch, an L2 lamp branch and an L3 lamp branch; the L1 lamp branch comprises a triode T1, the base electrode of the triode T1 is connected with the signal input end of the L1, the emitter electrode of the triode T1 is grounded, the collector electrode of the triode T1 is connected with the L1 lamp, the L1 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, the cathode of the light-emitting diode is connected with the triode T1, and a diode D1 is connected between the L1 lamp and the storage battery in parallel;
the L2 lamp branch comprises a triode T2, the base electrode of the triode T2 is connected with the signal input end of the L2, the emitter electrode of the triode T2 is grounded, the collector electrode of the triode T2 is connected with the L2 lamp, the L2 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, the cathode of the light-emitting diode is connected with the triode T2, and a diode D2 is connected between the L2 lamp and the storage battery in parallel;
the L3 lamp branch comprises a triode T3 and a triode T4, the base electrode of the triode T3 is connected with the signal input end of the L1, the collector electrode of the triode T3 is connected with the L3 lamp, the L3 lamp is a light-emitting diode, the anode of the light-emitting diode is connected with a storage battery, and the cathode of the light-emitting diode is connected with the triode T3; the base of the transistor T4 is connected to the signal input terminal L2, the emitter of the transistor T4 is grounded, and the emitter of the transistor T3 is connected to the collector of the transistor T4.
2. The instrument two-way signal control three-symbol lamp display circuit according to claim 1, characterized in that: the L1 signal input and the L2 signal input are controlled by a high level signal, 5V or 3.3V.
3. The instrument two-way signal control three-symbol lamp display circuit according to claim 1, characterized in that: in the branch of the L1 lamp, a resistor R1 is connected in series between the L1 lamp and the storage battery.
4. The instrument two-way signal control three-symbol lamp display circuit according to claim 3, characterized in that: in the branch of the L2 lamp, a resistor R2 is connected in series between the L2 lamp and the storage battery.
5. The instrument two-way signal control three-symbol lamp display circuit according to claim 4, wherein: in the branch of the L3 lamp, a resistor R3 is connected in series between the L3 lamp and the storage battery.
6. The instrument two-way signal control three-symbol lamp display circuit according to any one of claims 1 to 5, characterized in that: the voltage of the positive electrode of the storage battery is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120828811.6U CN215300984U (en) | 2021-04-20 | 2021-04-20 | Display circuit for controlling three symbol lamps by two signals of instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120828811.6U CN215300984U (en) | 2021-04-20 | 2021-04-20 | Display circuit for controlling three symbol lamps by two signals of instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215300984U true CN215300984U (en) | 2021-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120828811.6U Expired - Fee Related CN215300984U (en) | 2021-04-20 | 2021-04-20 | Display circuit for controlling three symbol lamps by two signals of instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215300984U (en) |
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2021
- 2021-04-20 CN CN202120828811.6U patent/CN215300984U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |