CN111703364A - Single-wire control indicator lamp state switching circuit and vehicle-mounted electronic equipment - Google Patents
Single-wire control indicator lamp state switching circuit and vehicle-mounted electronic equipment Download PDFInfo
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- CN111703364A CN111703364A CN202010573832.8A CN202010573832A CN111703364A CN 111703364 A CN111703364 A CN 111703364A CN 202010573832 A CN202010573832 A CN 202010573832A CN 111703364 A CN111703364 A CN 111703364A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/80—Circuits; Control arrangements
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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
Abstract
The embodiment of the application discloses a single-wire control indicating lamp state switching circuit and vehicle-mounted electronic equipment, and the single-wire control indicating lamp state switching circuit and the vehicle-mounted electronic equipment are used for controlling the on and off of an indicating lamp in a circuit switching state. The embodiment of the application comprises the following steps: a single-wire control indicator lamp state switching circuit comprises a first light emitting diode, a first transistor, a second light emitting diode, a second transistor, a first power supply port, a second power supply port and a pin signal port connected with a single chip microcomputer; the anode of the first light-emitting diode is connected with the first power supply port, and the cathode of the first light-emitting diode is connected with the collector of the first transistor; the anode of the second light emitting diode is connected with the second power supply port, and the cathode of the second light emitting diode is connected with the emitter of the second transistor; the base electrode of the first transistor is connected with the signal port, and the emitter electrode of the first transistor is grounded; the base electrode of the second transistor is connected with the signal port; the collector of the second transistor is grounded.
Description
Technical Field
The embodiment of the application relates to the technical field of electronic circuits, in particular to a single-wire control indicating lamp state switching circuit and vehicle-mounted electronic equipment.
Background
The automobile cockpit generally contains various different electrical devices, and each device reminds the current working state of driver with the color of status indicator lamp, so both convenient quick discernment also can guarantee safe driving. The scheme is that the color of the external indicator lamp is controlled by switching a single pin of a single chip microcomputer in the device.
At present, in a common indicator light control, a plurality of pins of a single chip microcomputer control color change of the indicator light, as shown in fig. 1, each indicator light corresponds to one pin of the single chip microcomputer, and color switching of the indicator light is controlled by switching of high and low level states of the pins. The number of the pins of the single chip microcomputer occupied by the switching mode is large, so that the number of connecting wires in the equipment is large, the area of a PCB occupied by a circuit is large, and the assembly and the maintenance of workers are not facilitated. Therefore, there is a need for a simplified control circuit that reduces assembly and maintenance difficulties.
Disclosure of Invention
In view of the above problem, a first aspect of the present application provides a single-wire control indicator lamp state switching circuit, including: the LED comprises a first LED, a first transistor, a second LED, a second transistor, a first power supply port, a second power supply port and a pin signal port connected with a single chip microcomputer;
the first transistor is an NPN type transistor, and the second transistor is a PNP type transistor;
the anode of the first light-emitting diode is connected with the first power supply port, and the cathode of the first light-emitting diode is connected with the collector of the first transistor;
the anode of the second light emitting diode is connected with the second power supply port, and the cathode of the second light emitting diode is connected with the emitter of the second transistor;
the base electrode of the first transistor is connected with the signal port, and the emitter electrode of the first transistor is grounded;
the base electrode of the second transistor is connected with the signal port; the collector of the second transistor is grounded.
Optionally, the power of the first light emitting diode when conducting is greater than the power of the second light emitting diode when conducting.
Optionally, the first power port and the second power port are connected to the same dc power source.
Optionally, a first resistor is connected in series between the base of the first transistor and the signal port;
a second resistor is connected in series between the anode of the first light-emitting diode and the first power supply;
a third resistor is connected in series between the base of the second transistor and the signal port;
and a fourth resistor is connected in series between the anode of the second light-emitting diode and the second power supply port.
Optionally, the voltage of the first power port and the second power port is higher than 0.7V.
Optionally, the first resistor and the third resistor have the same impedance, and the second resistor and the fourth resistor have the same impedance.
On the basis of the first aspect, a second aspect of the present application provides a single-wire control indicator light state switching circuit, which includes a first sub-circuit, a second sub-circuit, a third sub-circuit, a first power port and a second power port;
the first sub-circuit comprises:
the LED comprises a first LED, a first transistor, a second LED, a second transistor and a first signal port connected with a pin of a singlechip;
the first transistor is an NPN type transistor, and the second transistor is a PNP type transistor;
the anode of the first light-emitting diode is connected with the first power supply port, and the cathode of the first light-emitting diode is connected with the collector of the first transistor;
the anode of the second light emitting diode is connected with the second power supply port, and the cathode of the second light emitting diode is connected with the emitter of the second transistor;
the base electrode of the first transistor is connected with the first signal port, and the emitter electrode of the first transistor is grounded;
the base electrode of the second transistor is connected with the first signal port; a collector of the second transistor is grounded;
the second sub-circuit comprises:
the third light emitting diode, the third transistor, the fourth light emitting diode, the fourth transistor and a second signal port connected with the pin of the singlechip are connected;
the third transistor is an NPN transistor, and the fourth transistor is a PNP transistor;
the anode of the third light emitting diode is connected with the first power supply port, and the cathode of the third light emitting diode is connected with the collector of the third transistor;
the anode of the fourth light emitting diode is connected with the second power supply port, and the cathode of the fourth light emitting diode is connected with the emitter of the fourth transistor;
the base electrode of the third transistor is connected with the second signal port, and the emitter electrode of the third transistor is grounded;
the base electrode of the fourth transistor is connected with the second signal port, and the collector electrode of the fourth transistor is grounded;
the third sub-circuit comprises:
the fifth light emitting diode, the fifth transistor, the sixth light emitting diode, the sixth transistor and a third signal port connected with a pin of the singlechip;
the fifth transistor is an NPN transistor, and the sixth transistor is a PNP transistor;
the anode of the fifth light emitting diode is connected with the first power supply port, and the cathode of the fifth light emitting diode is connected with the collector of the fifth transistor;
the anode of the sixth light emitting diode is connected with the second power supply port, and the cathode of the sixth light emitting diode is connected with the emitter of the sixth transistor;
the base electrode of the fifth transistor is connected with the third signal port, and the emitter electrode of the fifth transistor is grounded;
the base electrode of the sixth transistor is connected with the third signal port, and the collector electrode of the sixth transistor is grounded.
Optionally, the power port voltage is higher than 0.7V.
Optionally, a first resistor is connected in series between the base of the first transistor and the first signal port;
a second resistor is connected in series between the anode of the first light-emitting diode and the first power supply port;
a third resistor is connected in series between the base of the second transistor and the first signal port;
a fourth resistor is connected in series between the anode of the second light-emitting diode and the second power supply port;
a fifth resistor is connected in series between the base of the third transistor and the second signal port;
a sixth resistor is connected in series between the anode of the third light-emitting diode and the first power supply port;
a seventh resistor is connected in series between the base of the fourth transistor and the second signal port;
an eighth resistor is connected in series between the anode of the fourth light emitting diode and the second power supply port;
a ninth resistor is connected in series between the base of the fifth transistor and the third signal port;
a tenth resistor is connected in series between the anode of the fifth light-emitting diode and the first power supply port;
an eleventh resistor is connected in series between the base of the sixth transistor and the third signal port;
and a twelfth resistor is connected in series between the anode of the sixth light-emitting diode and the second power supply port.
The third aspect of the present application further provides a vehicle-mounted electronic device, where the single-wire control indicator lamp state switching circuit is installed in the vehicle-mounted electronic device.
According to the technical scheme, the embodiment of the application has the following advantages: the single-wire control indicating lamp state switching circuit that this application provided occupies singlechip pin less to reduced the connecting wire of connecting the singlechip pin, the PCB board area that the circuit occupied is also littleer, has reduced the degree of difficulty of assembly and maintenance.
Drawings
FIG. 1 is a schematic diagram of a prior art indicator light control circuit;
FIG. 2 is a schematic diagram of a single-wire control indicator light state switching circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a single-wire control indicator lamp state switching circuit according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a single-line control indicator lamp state switching circuit, which can use the indicator lamp state switching in a single-chip microcomputer pin control circuit.
To explain the circuit in detail, the transistor in the circuit is a transistor having a base, a collector, and an emitter, and reference numerals 1, 2, and 3 next to the transistor in the circuit diagram respectively denote three pins of the transistor. Referring to fig. 2, the single-wire control indicator lamp state switching circuit includes: the LED driving circuit comprises a first light emitting diode LED1, a first transistor Q1, a second light emitting diode LED2, a second transistor Q2, a first power supply port VDD1, a second power supply port VDD2 and a signal port LED _ CTL1 connected with pins of a single chip microcomputer.
The first transistor Q1 is an NPN type transistor, and the second transistor Q2 is a PNP type transistor;
an anode of the first light emitting diode LED1 is connected to the first power port VDD1, and a cathode of the first light emitting diode LED1 is connected to a collector of the first transistor Q1;
the anode of the second light emitting diode LED2 is connected to the second power port VDD2, and the cathode of the second light emitting diode LED2 is connected to the emitter of the second transistor Q2;
the base of the first transistor Q1 is connected to the signal port LED _ CTL1, and the emitter of the first transistor Q1 is grounded;
the base of the second transistor Q2 is connected to the signal port LED _ CTL 1; the collector of the second transistor Q2 is grounded.
In order to make the transistors work normally, a resistor R1 of 10k Ω is arranged between the base of the first transistor Q1 and the signal port LED _ CTL1, and a resistor R12 of 10k Ω is arranged between the base of the second transistor Q2 and the signal port LED _ CTL 1; a 1k Ω resistor R2 is connected in series in the branch where the first light emitting diode LED1 is located, and a 1k Ω resistor R12 is connected in series in the branch where the second light emitting diode LED2 is located.
When the signal port LED _ CTL1 is connected to one control pin of the single chip microcomputer, the pin controls the state switching of the indicator light. When the control pin outputs a low level, the emitter junction voltage of the second transistor Q2 is greater than the on voltage of the PN junction, the base potential of the second transistor Q2 is higher than the collector junction potential, the collector junction of the second transistor Q2 is reversely biased, and the second transistor Q2 is in an amplification state at this time, so that the second light emitting diode LED2 can be turned on to light. Meanwhile, at the same time, the emitter junction potential of the first transistor Q1 is smaller than the PN junction conducting potential, and the base current of the first transistor Q1 is zero, so the collector current and the emitter current of the first transistor Q1 are both zero, and the collector-emitter current corresponds to the off state of the switch, at this time, the first transistor Q1 is in the off state, so the first light emitting diode LED1 cannot be turned on, and the first light emitting diode LED1 is in the off state.
When the control pin of the single chip microcomputer outputs a high level, the emitter junction voltage of the first transistor Q1 is greater than the conduction voltage of the PN junction, the base potential of the first transistor Q1 is higher than the collector potential of the first transistor Q1, the collector junction of the first transistor Q1 is forward biased, and at this time, the transistor Q1 is in an amplification state, so that the first light emitting diode LED1 can be turned on and in a lighting state; meanwhile, the emitter junction voltage of the second transistor Q2 is less than the on voltage of the PN junction, and the base potential of the second transistor Q2 is higher than the collector junction potential of the second transistor Q2, so that the collector junction of the second transistor Q2 is reverse biased, the base current is zero, and the off state of the switch is between the collector and the emitter. At this time, the second transistor Q2 is in an off state, and thus the second light emitting diode LED2 cannot be turned on, and the second light emitting diode LED2 is in an off state.
In practical application, the two diodes can be replaced by diodes with any color, but the colors of the two light emitting diodes which are usually adopted have a contrast which is obvious in contrast, so that different states can be clearly shown to users.
As a further improvement of the above circuit, there may be a certain power difference between the specific models of the above leds. Since the first light emitting diode LED1 is connected to the collector of the first transistor Q1, the load carrying capability is stronger, and therefore the power of the first light emitting diode LED1 can be slightly larger than that of the second light emitting diode LED 2.
As a further improvement of the above circuit, the voltages of the first power supply port VDD1 and the second power supply port VDD2 should both be higher than 0.7V to satisfy the on voltage of the PN junction. The first power port VDD1 and the second power port VDD2 may also be connected to the same dc power source to further simplify the circuit.
The present application further provides another embodiment of the above single-wire control indicator light state switching circuit, which comprises a first sub-circuit, a second sub-circuit, a third sub-circuit, a first power port VDD1 and a second power port VDD 2;
the first sub-circuit comprises:
the LED driving circuit comprises a first light emitting diode LED1, a first transistor Q1, a second light emitting diode LED11, a second transistor Q2 and a first signal port LED _ CTL1 connected with a pin of the single chip microcomputer;
the first transistor Q1 is an NPN type transistor, and the second transistor Q2 is a PNP type transistor;
an anode of the first light emitting diode LED1 is connected to the first power port VDD1, and a cathode of the first light emitting diode LED1 is connected to a collector of the first transistor Q1;
the anode of the second light emitting diode LED11 is connected to the second power port VDD2, and the cathode of the second light emitting diode LED11 is connected to the emitter of the second transistor Q2;
the base of the first transistor Q1 is connected to the first signal port, and the emitter of the first transistor Q1 is grounded;
the base of the second transistor Q2 is connected with the first signal port; the collector of the second transistor Q2 is grounded;
the second sub-circuit comprises:
a third light emitting diode LED2, a third transistor Q3, a fourth light emitting diode LED22, a fourth transistor Q4 and a second signal port LED _ CTL2 connected with the pin of the single chip microcomputer;
the third transistor Q3 is an NPN-type transistor, and the fourth transistor Q4 is a PNP-type transistor;
an anode of the third light emitting diode LED2 is connected to the first power source port VDD1, and a cathode of the third light emitting diode LED2 is connected to a collector of the third transistor Q3;
an anode of the fourth light emitting diode LED22 is connected to the second power port VDD2, and a cathode of the fourth light emitting diode LED22 is connected to an emitter of the fourth transistor Q4;
the base of the third transistor Q3 is connected to the second signal port LED _ CTL2, and the emitter of the third transistor Q3 is grounded;
the base of the fourth transistor Q4 is connected to the second signal port LED _ CTL2, and the collector of the fourth transistor Q4 is grounded;
the third sub-circuit comprises:
a fifth light emitting diode LED3, a fifth transistor Q5, a sixth light emitting diode LED33, a sixth transistor Q6 and a third signal port LED _ CTL3 connected with the pins of the single chip microcomputer;
the fifth transistor Q5 is an NPN-type transistor, and the sixth transistor Q6 is a PNP-type transistor;
an anode of the fifth light emitting diode LED3 is connected to the first power port VDD1, and a cathode of the fifth light emitting diode LED3 is connected to a collector of the fifth transistor Q5;
an anode of the sixth light emitting diode LED33 is connected to the second power port VDD2, and a cathode of the sixth light emitting diode LED33 is connected to an emitter of the sixth transistor Q6;
the base of the fifth transistor Q5 is connected to the third signal port LED _ CTL3, and the emitter of the fifth transistor Q5 is grounded;
the base of the sixth transistor Q6 is connected to the third signal port LED _ CTL3, and the collector of the sixth transistor Q6 is connected to ground.
The operation principle of each sub-circuit in this embodiment can refer to the circuit in the embodiment shown in fig. 2. The three sub-circuits work independently without interference. When the first signal port LED _ CTL1 outputs a low level, the second light emitting diode LED11 is turned on to emit light, and the first light emitting diode LED1 is turned off; when the first signal port LED _ CTL1 outputs a high level, the first light emitting diode LED1 is turned on to emit light, and the second light emitting diode LED11 is turned off. Similarly, when the second signal port LED _ CTL2 outputs a low level, the fourth light emitting diode LED22 is turned on to emit light, and the third light emitting diode LED2 is turned off; when the second signal port LED _ CTL2 outputs a high level, the third light emitting diode LED2 is turned on to emit light, and the fourth light emitting diode LED22 is turned off. When the third signal port LED _ CTL3 outputs a low level, the sixth light emitting diode LED33 is turned on to emit light, and the fifth light emitting diode LED3 is turned off; when the third signal port LED _ CTL3 outputs a high level, the fifth light emitting diode LED3 is turned on to emit light, and the sixth light emitting diode LED33 is turned off. Preferably, a first resistor R1 is connected in series between the base of the first transistor Q1 and the first signal port; a second resistor R2 is connected in series between the anode of the first light-emitting diode LED1 and the first power supply port VDD 1; a third resistor R3 is connected in series between the base of the second transistor Q2 and the first signal port LED _ CTL 1; a second resistor R4 is connected in series between the anode of the second light emitting diode LED11 and the second power supply port VDD 2; a fifth resistor R5 is connected in series between the base of the third transistor Q3 and the second signal port LED _ CTL 2; a sixth resistor R6 is connected in series between the anode of the third light emitting diode LED2 and the first power supply port VDD 1; a seventh resistor R7 is connected in series between the base of the fourth transistor Q4 and the second signal port LED _ CTL 2; an eighth resistor R8 is connected in series between the anode of the fourth light emitting diode LED22 and the second power supply port VDD 2; a ninth resistor R9 is connected in series between the base of the fifth transistor Q5 and the third signal port LED _ CTL 3; a tenth resistor R10 is connected in series between the anode of the fifth light emitting diode LED3 and the first power supply port VDD 1; an eleventh resistor R11 is connected in series between the base of the sixth transistor Q6 and the third signal port LED _ CTL 3; a twelfth resistor R12 is connected in series between the anode of the sixth light emitting diode LED33 and the second power source port VDD 2. The first resistor R1, the third resistor R3, the fifth resistor R5, the seventh resistor R7, the ninth resistor R9 and the eleventh resistor R11 in FIG. 3 adopt resistors with the same impedance of 10k Ω; the second resistor R2, the fourth resistor R4, the sixth resistor R6, the eighth resistor R8, the tenth resistor R10 and the twelfth resistor R12 adopt resistors with the same impedance of 1k Ω. In practical applications, transistors and light emitting diodes with different specifications can also be used in the sub-circuits by using resistors with different impedances in the sub-circuits.
The voltages of the power supply ports VDD1 and VDD2 of this embodiment should be higher than 0.7V in order to satisfy the on-voltage requirement of the PN junction. It is understood that any number of sub-circuits may be combined by one skilled in the art without departing from the spirit and scope of the present disclosure, resulting in a single-wire control circuit that can control more indicator lights.
The application also provides a vehicle-mounted electronic device, wherein the single-wire control circuit of the indicator lamp shown in fig. 2 or fig. 3 is installed in the vehicle-mounted electronic device, and the vehicle-mounted electronic device can change different states of the indicator lamp through the single-wire control circuit and inform the operating state of the vehicle-mounted electronic device to personnel on the vehicle.
Taking a vehicle-mounted air conditioner as an example, when the circuit shown in fig. 2 is applied to a switch indicator light circuit of the vehicle-mounted air conditioner, the working condition of the vehicle-mounted air conditioner can be shown to a driver. When the vehicle-mounted air conditioner is not started, the LED _ CTL1 is at a low level, the yellow second light-emitting diode LED2 is turned on to emit light, the green first light-emitting diode LED1 is turned off, and the indicator light seen by the driver is yellow, so that the fact that the air conditioner is not started can be known. When the vehicle-mounted air conditioner is started, the ED _ CTL1 is raised from a low level to a high level, the yellow second light-emitting diode LED2 is cut off, the green first light-emitting diode LED1 is turned on to emit light, the color of the indicator lamp seen by a driver is green, the fact that the air conditioner is not started can be known, and the color of the indicator lamp can be switched by a signal port LED _ CTL 1. When the number of the indicator lights of the air conditioner is large, the circuit shown in fig. 3 or the plurality of groups 2 can be adopted to control the plurality of indicator lights to show the information such as the operation mode of the air conditioner, the on-off state of the rear air conditioner and the like to a driver. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
Claims (10)
1. A single wire controlled indicator light state switching circuit, comprising: the LED comprises a first LED, a first transistor, a second LED, a second transistor, a first power supply port, a second power supply port and a pin signal port connected with a single chip microcomputer;
the first transistor is an NPN type transistor, and the second transistor is a PNP type transistor;
the anode of the first light-emitting diode is connected with the first power supply port, and the cathode of the first light-emitting diode is connected with the collector of the first transistor;
the anode of the second light emitting diode is connected with the second power supply port, and the cathode of the second light emitting diode is connected with the emitter of the second transistor;
the base electrode of the first transistor is connected with the signal port, and the emitter electrode of the first transistor is grounded;
the base electrode of the second transistor is connected with the signal port; the collector of the second transistor is grounded.
2. The single-wire controlled indicator light state switching circuit of claim 1, wherein the first light emitting diode is turned on at a power greater than the second light emitting diode.
3. The single-wire controlled indicator light state switching circuit of claim 1, wherein the first power port and the second power port are connected to the same dc power source.
4. The single-wire controlled indicator light state switching circuit of any one of claims 1 to 3, wherein:
a first resistor is connected in series between the base of the first transistor and the signal port;
a second resistor is connected in series between the anode of the first light-emitting diode and the first power supply;
a third resistor is connected in series between the base of the second transistor and the signal port;
and a fourth resistor is connected in series between the anode of the second light-emitting diode and the second power supply port.
5. The single-wire controlled indicator light state switching circuit of any one of claims 1 to 3, wherein the voltage of the first power port and the second power port is higher than 0.7V.
6. The single wire controlled indicator light state switching circuit of claim 4, wherein the first resistance is the same as the third resistance impedance and the second resistance is the same as the fourth resistance impedance.
7. A single-wire control indicator lamp state switching circuit is characterized by comprising a first sub-circuit, a second sub-circuit, a third sub-circuit, a first power supply port and a second power supply port;
the first sub-circuit comprises:
the LED comprises a first LED, a first transistor, a second LED, a second transistor and a first signal port connected with a pin of a singlechip;
the first transistor is an NPN type transistor, and the second transistor is a PNP type transistor;
the anode of the first light-emitting diode is connected with the first power supply port, and the cathode of the first light-emitting diode is connected with the collector of the first transistor;
the anode of the second light emitting diode is connected with the second power supply port, and the cathode of the second light emitting diode is connected with the emitter of the second transistor;
the base electrode of the first transistor is connected with the first signal port, and the emitter electrode of the first transistor is grounded;
the base electrode of the second transistor is connected with the first signal port; a collector of the second transistor is grounded;
the second sub-circuit comprises:
the third light emitting diode, the third transistor, the fourth light emitting diode, the fourth transistor and a second signal port connected with the pin of the singlechip are connected;
the third transistor is an NPN transistor, and the fourth transistor is a PNP transistor;
the anode of the third light emitting diode is connected with the first power supply port, and the cathode of the third light emitting diode is connected with the collector of the third transistor;
the anode of the fourth light emitting diode is connected with the second power supply port, and the cathode of the fourth light emitting diode is connected with the emitter of the fourth transistor;
the base electrode of the third transistor is connected with the second signal port, and the emitter electrode of the third transistor is grounded;
the base electrode of the fourth transistor is connected with the second signal port, and the collector electrode of the fourth transistor is grounded;
the third sub-circuit comprises:
the fifth light emitting diode, the fifth transistor, the sixth light emitting diode, the sixth transistor and a third signal port connected with a pin of the singlechip;
the fifth transistor is an NPN transistor, and the sixth transistor is a PNP transistor;
the anode of the fifth light emitting diode is connected with the first power supply port, and the cathode of the fifth light emitting diode is connected with the collector of the fifth transistor;
the anode of the sixth light emitting diode is connected with the second power supply port, and the cathode of the sixth light emitting diode is connected with the emitter of the sixth transistor;
the base electrode of the fifth transistor is connected with the third signal port, and the emitter electrode of the fifth transistor is grounded;
the base electrode of the sixth transistor is connected with the third signal port, and the collector electrode of the sixth transistor is grounded.
8. The single wire control indicator light state switching circuit of claim 7, wherein the power supply port voltage is greater than 0.7V.
9. The single-wire controlled indicator light state switching circuit of claim 7,
a first resistor is connected in series between the base of the first transistor and the first signal port;
a second resistor is connected in series between the anode of the first light-emitting diode and the first power supply port;
a third resistor is connected in series between the base of the second transistor and the first signal port;
a fourth resistor is connected in series between the anode of the second light-emitting diode and the second power supply port;
a fifth resistor is connected in series between the base of the third transistor and the second signal port;
a sixth resistor is connected in series between the anode of the third light-emitting diode and the first power supply port;
a seventh resistor is connected in series between the base of the fourth transistor and the second signal port;
an eighth resistor is connected in series between the anode of the fourth light emitting diode and the second power supply port;
a ninth resistor is connected in series between the base of the fifth transistor and the third signal port;
a tenth resistor is connected in series between the anode of the fifth light-emitting diode and the first power supply port;
an eleventh resistor is connected in series between the base of the sixth transistor and the third signal port;
and a twelfth resistor is connected in series between the anode of the sixth light-emitting diode and the second power supply port.
10. An in-vehicle electronic apparatus characterized in that the in-vehicle electronic apparatus is mounted with a one-wire control indicator lamp state switching circuit including any one of claims 1 to 9.
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| DE3309548A1 (en) * | 1983-03-17 | 1984-09-27 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | CIRCUIT ARRANGEMENT FOR THE INTERIOR LIGHTING OF A MOTOR VEHICLE |
| CN2508461Y (en) * | 2001-08-15 | 2002-08-28 | 安普生科技股份有限公司 | Drive circuit of LED |
| DE102005044964B3 (en) * | 2005-09-20 | 2007-04-12 | Preh Gmbh | Circuit arrangement for controlling interior lighting in motor vehicle has transistor, diode whereby circuit arrangement interconnects control signal applying to the input depending upon switching signal applying to terminal to output |
| CN101071209A (en) * | 2006-05-12 | 2007-11-14 | 群康科技(深圳)有限公司 | Liquid crystal display device power supply and discharge circuit |
| CN202149931U (en) * | 2011-03-01 | 2012-02-22 | 广州视源电子科技有限公司 | Simple three-state LED display circuit for indicating work states |
| CN204392673U (en) * | 2015-03-16 | 2015-06-10 | 黄月华 | The light-operated double-colored flashing warning light of municipal road construction |
| CN205196028U (en) * | 2015-10-27 | 2016-04-27 | 重庆绿彰科技发展有限公司 | Formaldehyde ventilator working status indicator control circuit is removed to intelligence |
| CN205355882U (en) * | 2016-02-02 | 2016-06-29 | 山西大同大学 | Novel battery stator indicator |
| CN106686830A (en) * | 2017-02-17 | 2017-05-17 | 吴建堂 | Movable type LED (Light Emitting Diode) steering lamp of car tail |
-
2020
- 2020-06-22 CN CN202010573832.8A patent/CN111703364A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3309548A1 (en) * | 1983-03-17 | 1984-09-27 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | CIRCUIT ARRANGEMENT FOR THE INTERIOR LIGHTING OF A MOTOR VEHICLE |
| CN2508461Y (en) * | 2001-08-15 | 2002-08-28 | 安普生科技股份有限公司 | Drive circuit of LED |
| DE102005044964B3 (en) * | 2005-09-20 | 2007-04-12 | Preh Gmbh | Circuit arrangement for controlling interior lighting in motor vehicle has transistor, diode whereby circuit arrangement interconnects control signal applying to the input depending upon switching signal applying to terminal to output |
| CN101071209A (en) * | 2006-05-12 | 2007-11-14 | 群康科技(深圳)有限公司 | Liquid crystal display device power supply and discharge circuit |
| CN202149931U (en) * | 2011-03-01 | 2012-02-22 | 广州视源电子科技有限公司 | Simple three-state LED display circuit for indicating work states |
| CN204392673U (en) * | 2015-03-16 | 2015-06-10 | 黄月华 | The light-operated double-colored flashing warning light of municipal road construction |
| CN205196028U (en) * | 2015-10-27 | 2016-04-27 | 重庆绿彰科技发展有限公司 | Formaldehyde ventilator working status indicator control circuit is removed to intelligence |
| CN205355882U (en) * | 2016-02-02 | 2016-06-29 | 山西大同大学 | Novel battery stator indicator |
| CN106686830A (en) * | 2017-02-17 | 2017-05-17 | 吴建堂 | Movable type LED (Light Emitting Diode) steering lamp of car tail |
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Application publication date: 20200925 |