CN106658887B - One-key three-gear LED lamp control circuit - Google Patents
One-key three-gear LED lamp control circuit Download PDFInfo
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- CN106658887B CN106658887B CN201510750440.3A CN201510750440A CN106658887B CN 106658887 B CN106658887 B CN 106658887B CN 201510750440 A CN201510750440 A CN 201510750440A CN 106658887 B CN106658887 B CN 106658887B
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Abstract
The embodiment of the invention discloses a one-key three-gear LED lamp control circuit, which comprises: the LED lamp circuit comprises a switch circuit, a level control circuit, a cut-off circuit, a delay circuit and an LED lamp circuit; the switch circuit is used for outputting control voltage to the level control circuit; the level control circuit is connected with the switch circuit, the cut-off circuit, the delay circuit and the LED lamp circuit, and is used for outputting a first control signal and a second control signal according to control voltage, receiving feedback voltage of the cut-off circuit and controlling the first control signal and the second control signal according to the feedback voltage; the delay circuit is connected with the cut-off circuit and is used for outputting the second control signal to the cut-off circuit in a delayed manner; the cut-off circuit is used for outputting feedback voltage to the level control circuit according to the first control signal and the second control signal; the LED lamp circuit is used for respectively controlling the on and off of the two groups of diodes according to the first control signal and the second control signal. By adopting the invention, the two groups of LED lamps can be respectively controlled by a single key.
Description
Technical Field
The invention relates to the field of circuit control, in particular to a one-key three-gear LED lamp control circuit.
Background
At present, a single-button LED lamp control circuit generally has two-stage functions, namely on and off functions, and can simultaneously control the on and off of a single or a plurality of LEDs by one-button two-stage control. However, in many cases, it is desirable to control the two sets of LED lamps to be turned on and off respectively by pressing a single key, and the one-key two-shift circuit can only realize the respective control by a plurality of keys, which not only wastes resources, but also occupies space, and is poor in user experience.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a one-key three-gear LED lamp control circuit, which can respectively control two groups of LED lamps by a single key, so as to realize three states of controlling two groups of LED lamps by a single key.
The embodiment of the invention provides a one-key three-gear LED lamp control circuit, which comprises a switch circuit, a level control circuit, a cut-off circuit, a time delay circuit and an LED lamp circuit, wherein:
the switch circuit is used for outputting a control voltage to the level control circuit;
the level control circuit is connected with the switch circuit, the cut-off circuit, the delay circuit and the LED lamp circuit, and is used for respectively outputting a first control signal and a second control signal to the cut-off circuit, the delay circuit and the LED lamp circuit according to the control voltage output by the switch circuit, receiving the feedback voltage of the cut-off circuit, and controlling the first control signal and the second control signal according to the feedback voltage;
the delay circuit is connected with the cut-off circuit and is used for delaying and outputting the second control signal output by the level control circuit to the cut-off circuit;
the cut-off circuit is used for outputting feedback voltage to the level control circuit according to the first control signal and the second control signal output by the level control circuit and the delay circuit;
the LED lamp circuit comprises two groups of diodes and is used for respectively controlling the on and off of the two groups of diodes according to a first control signal and a second control signal output by the level control circuit.
Wherein, level control circuit includes first triode, second triode, third diode, first resistance and second resistance:
a base electrode of the first triode is connected with the output end of the second control signal, a collector electrode of the first triode is connected with the output end of the first control signal, and an emitting electrode of the first triode is grounded;
a base electrode of the third triode is connected with the output end of the first control signal, a collector electrode of the third triode is connected with the output end of the second control signal, and an emitting electrode of the third triode is grounded;
the base electrode of the second triode is connected with the collector electrodes of the first triode and the third triode, the collector electrode of the second triode is connected with the base electrodes of the first triode and the third triode, and the emitting electrode of the second triode is connected with the negative electrode of the third diode;
the positive pole of the third diode is connected with the circuit power supply, the output end of the first control signal is connected with the circuit power supply through a first resistor, and the output end of the second control signal is connected with the circuit power supply through a second resistor.
Wherein, the cutoff circuit includes a fourth triode and a fifth triode:
a base electrode of the fourth triode is connected with the output end of the first control signal, a collector electrode of the fourth triode is connected with an emitting electrode of the fifth triode, and the emitting electrode of the fourth triode is connected with a circuit power supply;
and the collector of the fifth triode is connected with the cathode of the third diode of the level control circuit.
Wherein, the delay circuit includes third resistance and first electric capacity:
one end of the third resistor is connected with the negative electrode of the first capacitor, and the other end of the third resistor is connected with the output end of the second control signal;
and the anode of the first capacitor is connected with a circuit power supply, and the cathode of the first capacitor is connected with the base electrode of the fifth triode of the cut-off circuit.
Wherein, the switching circuit includes fourth resistance, second electric capacity and switch:
one end of the switch is connected with the anode of the second capacitor, and the other end of the switch is connected with the base electrode of the first triode of the level control circuit;
one end of the fourth resistor is connected with the anode of the second capacitor, and the other end of the fourth resistor is connected with the output end of the first control signal;
and the negative electrode of the second capacitor is grounded.
Wherein, LED lamp circuit includes first diode and second diode:
the anode of the first diode is connected with a circuit power supply, and the cathode of the first diode is connected with the output end of the first control signal;
and the anode of the second diode is connected with a circuit power supply, and the cathode of the second diode is connected with the output end of the second control signal.
When the circuit is in a power-on initial state, the level control circuit outputs the first control signal with high level and the second control signal with high level to the LED lamp circuit, so that the LED lamp circuit controls the first diode and the second diode to be extinguished according to the first control signal with high level and the second control signal with high level;
when a switch of the switch circuit is opened after being closed for the first time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with low level and a second control signal with high level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be lightened according to the first control signal with low level and controls the second diode to be extinguished according to the second control signal with high level;
when a switch of the switch circuit is opened after being closed for the second time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with high level and a second control signal with low level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be turned off according to the first control signal with high level and controls the second diode to be turned on according to the second control signal with low level;
when a switch of the switch circuit is opened after being closed for the third time, the switch circuit outputs a control voltage to the level control circuit, the level control circuit outputs a low-level first control signal to the cut-off circuit according to the received control voltage and outputs a high-level second control signal to the delay circuit, the delay circuit delays and outputs the high-level second control signal output by the level control circuit to the cut-off circuit, the cut-off circuit outputs a feedback voltage to the level control circuit according to the low-level first control signal output by the level control circuit and the high-level second control signal output by the delay circuit in the charging process, and the level control circuit controls the first control signal and the second control signal to be high-level according to the feedback voltage, so that the LED lamp circuit controls the first diode to extinguish according to the first control signal with high level and controls the second diode to extinguish according to the second control signal with high level, and the circuit returns to the power-on initial state.
The embodiment of the invention has the following beneficial effects: the LED lamp control circuit outputs control voltage to the level control circuit through the switch circuit, the level control circuit respectively outputs a first control signal and a second control signal to the cut-off circuit, the delay circuit and the LED lamp circuit according to the control voltage output by the switch circuit, the delay circuit outputs the second control signal output by the level control circuit to the cut-off circuit in a delay mode, the cut-off circuit outputs feedback voltage to the level control circuit according to the first control signal and the second control signal output by the level control circuit and the delay circuit, the level control circuit controls the first control signal and the second control signal according to the feedback voltage, the LED lamp circuit respectively controls the on and off of the two groups of diodes according to the first control signal and the second control signal output by the level control circuit, and three states of controlling the two groups of LED lamps by one-button keys are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a one-key three-gear LED lamp control circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a one-key three-gear LED lamp control circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a one-key three-gear LED lamp control circuit according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a one-key three-gear LED lamp control circuit according to an embodiment of the present invention. With reference to fig. 1 and 2, the circuit includes a switching circuit 10, a level control circuit 20, a delay circuit 30, a cutoff circuit 40, and an LED lamp circuit 50, wherein:
the switching circuit 10 outputs a control voltage to the level control circuit 20. The switch circuit 10 may include a fourth resistor R4, a second capacitor C2, and a switch S1 as shown in fig. 2. Wherein the content of the first and second substances,
one end of the switch S1 is connected to the anode of the second capacitor C2, and the other end is connected to the base of the first transistor Q1 of the level control circuit 20. One end of the fourth resistor R4 is connected to the positive electrode of the second capacitor C2, and the other end is connected to the output terminal L _ out1 of the first control signal. The cathode of the second capacitor C2 is connected to ground.
The level control circuit 20 is connected to the switch circuit 10, the delay circuit 30, the cut-off circuit 40 and the LED lamp circuit 50, and configured to output a first control signal and a second control signal to the delay circuit 30, the cut-off circuit 40 and the LED lamp circuit 50, respectively, according to the control voltage output by the switch circuit 10, and further configured to receive a feedback voltage of the cut-off circuit 40, and control the first control signal and the second control signal according to the feedback voltage. As shown in fig. 2, the level control circuit 20 may include a first transistor Q1, a second transistor Q2, a third transistor Q3, a third diode D3, a first resistor R1, a second resistor R2, resistors R5 to R12, and diodes D4 to D9. Wherein the content of the first and second substances,
the base of the first triode Q1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the cathode of a diode D8, the anode of the diode D8 is connected with the anode of a diode D4, the cathode of a diode D4 is connected with the output end L _ out2 of the second control signal, the collector of the first triode Q1 is connected with the output end L _ out1 of the first control signal, and the emitter is connected with the base through a resistor R5 and grounded.
The base of the third triode Q3 is connected with the cathode of the diode D9, the anode of the diode D9 is connected with the anode of the diode D5, the cathode of the diode D5 is connected with the output terminal L _ out1 of the first control signal, the collector of the third triode Q3 is connected with the output terminal L _ out2 of the second control signal, and the emitter is connected with the base through the resistor R6 and grounded.
The output terminal L _ out1 of the first control signal is connected to the circuit power VCC through a first resistor R1, and the output terminal L _ out2 of the second control signal is connected to the circuit power VCC through a second resistor R2.
The base of the second triode Q2 is connected to the anodes of the diode D6 and the diode D7, the cathodes of the diode D6 and the diode D7 are connected to the collectors of the first triode Q1 and the third triode Q3 through the resistor R10 and the resistor R11, the collector of the second triode Q2 is connected to the resistor R8 and the resistor R9, the resistor R8 and the resistor R9 are connected to the anodes of the diode D8 and the diode D9, the emitter of the second triode Q2 is connected to the cathodes of the resistor R12 and the third diode D3, and the anode of the third diode D3 is connected to the circuit power source VCC.
And the delay circuit 30 is connected with the cut-off circuit 40 and is used for delaying and outputting the second control signal output by the level control circuit 20 to the cut-off circuit 40. The delay circuit 30 may include a third resistor R3, a first capacitor C1, and a resistor R13 as shown in fig. 2, wherein,
one end of the third resistor R3 is connected to the negative terminal of the first capacitor C1, and the other end is connected to the output terminal L _ out2 of the second control signal. The positive electrode of the first capacitor C1 is connected to the circuit power VCC, and the negative electrode is connected to the base of the fifth transistor Q5 of the cut-off circuit 40 through the resistor R13.
The cut-off circuit 40 is configured to output a feedback voltage to the level control circuit 20 according to the first control signal output by the level control circuit 20 and the second control signal delayed and output by the delay circuit 30. The cutoff circuit 40 may include a fourth transistor Q4, a fifth transistor Q, and a resistor R14, as shown in fig. 2, wherein,
the base of the fourth triode Q4 is connected to the output terminal L _ out1 of the first control signal through a resistor R14, the collector thereof is connected to the emitter of the fifth triode Q5, and the emitter thereof is connected to the circuit power VCC. The collector of the fifth transistor Q5 is connected to the cathode of the third diode D3 through the resistor R12 of the level control circuit 20.
The LED lamp circuit 50 includes two sets of diodes, and is configured to control on and off of the two sets of diodes respectively according to the first control signal and the second control signal output by the level control circuit 20. The LED lamp circuit 50 may include a first diode D1, a second diode D2, resistors R15, and R16 as shown in fig. 2, wherein,
the anode of the first diode D1 is connected to the circuit power VCC through the resistor R15, and the cathode is connected to the output terminal L _ out1 of the first control signal. And the anode of the second diode is connected with the circuit power supply VCC through the resistor R16, and the cathode of the second diode is connected with the output end L _ out2 of the second control signal.
The working principle of the one-key three-gear LED lamp control circuit provided by the embodiment of the present invention is fully described below with reference to fig. 2.
When the circuit is in a power-on initial state, the level control circuit outputs the first control signal with high level and the second control signal with high level to the LED lamp circuit, so that the LED lamp circuit controls the first diode and the second diode to be extinguished according to the first control signal with high level and the second control signal with high level.
Specifically, for example, in the circuit shown in fig. 2, in the power-on initial state, all transistors in the circuit are in the off state, and the output terminal L _ out1 of the first level control signal and the output terminal L _ out2 of the second level control signal both output a high level because they are connected to the circuit power VCC through the first resistor R1 and the second resistor R2, respectively. Since the first diode D1 and the second diode D2 of the LED lamp circuit 50 can be turned on only by outputting a low level through the output terminal L _ out1 of the first level control signal and the output terminal L _ out2 of the second level control signal, both the first diode D1 and the second diode D2 are turned off. In the switch circuit 10, the circuit power VCC may charge the second capacitor C2 through the fourth resistor R4 until the voltage of the second capacitor C2 is VCC.
When a switch of the switch circuit is opened after being closed for the first time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with low level and a second control signal with high level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be lightened according to the first control signal with low level and controls the second diode to be extinguished according to the second control signal with high level.
Specifically, for example, in the circuit shown in fig. 2, when the switch of the switch circuit 10 is opened after being closed for the first time, since the voltage across the second capacitor C2 cannot change suddenly, the switch circuit 10 can output the control voltage VCC to the level control circuit 20 through the second capacitor C2, so that the emitter junction of the first transistor Q1 is turned on through the control voltage VCC. Since the first transistor Q1 is turned on and the second transistor Q2 is therefore in saturation conduction, the output terminal L _ out1 of the first control signal can output the saturation conduction voltage 0.3V on the first transistor Q1, i.e., the first control signal with a low level. At this time, the base voltage of the third transistor Q3 is also about 0.3V, which cannot reach the on-state voltage drop of 0.7V of the third transistor Q3, and therefore the third transistor Q3 is turned off. After the third transistor Q3 is turned off, the output terminal L _ out2 of the second control signal is connected to VCC through the second resistor R2, so that the second control signal with a high level can still be output. At this time, the LED lamp circuit 50 turns on the first diode D1 according to the first control signal of low level, turns off the second diode D2 according to the second control signal of high level, and the second capacitor C2 in the switch circuit 10 is connected to the output terminal L _ out1 of the first control signal, so that it can be discharged to the saturation drop of 0.3V of the first transistor Q1.
It should be noted that the delay circuit 30 delays when the level of the output terminal L _ out2 of the second control signal changes, and here, the high level of the output terminal L _ out2 of the second control signal is consistent with the power-on initial level, so the delay circuit 30 does not delay. Further, the fourth transistor Q4 in the cutoff circuit 40 is turned on, and the fifth transistor Q5 is turned off.
When a switch of the switch circuit is opened after being closed for the second time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with high level and a second control signal with low level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be turned off according to the first control signal with high level and controls the second diode to be turned on according to the second control signal with low level.
Specifically, for example, in the circuit shown in fig. 2, when the switch of the switch circuit 10 is opened after being closed for the second time, since the voltage across the second capacitor C2 cannot change suddenly, the control voltage output by the switch circuit 10 to the level control circuit 20 through the second capacitor C2 is about 0.3V, so that the first transistor Q1 is turned off, and therefore the output terminal L _ out1 of the first control signal is connected to VCC through the first resistor R1, and the first control signal with a high level can be output. Furthermore, the third transistor Q3 is turned on by the first control signal with a high level, and the output terminal L _ out2 of the second control signal can output a saturation turn-on voltage of 0.3V at the third transistor Q3, i.e., the second control signal with a low level. At this time, the LED lamp circuit 50 turns off the first diode D1 in response to the first control signal of high level, and turns on the second diode D2 in response to the second control signal of low level. And the circuit power VCC in the switch circuit 10 can charge the second capacitor C2 through the fourth resistor R4 until the voltage of the second capacitor C2 is VCC.
It should be noted that, the on and off of the transistor require time, and the time length is different depending on the saturation depth. Therefore, there may be a case where the fifth transistor Q5 is already turned on when the fourth transistor Q4 is not completely turned off, that is, the fourth transistor Q4 and the fifth transistor Q5 are simultaneously turned on, and thus the second transistor Q2 may be turned off, so that the circuit may not operate normally.
In the embodiment, due to the level change of the output terminal L _ out2 of the second control signal, the delay circuit 30 will delay the output of the low level second control signal from the output terminal L _ out2 of the second control signal to the cut-off circuit 40. Specifically, due to the RC discharge delay of the C1 and the R3, the process of the output terminal L _ out2 of the second control signal changing from high level to low level is delayed to act on the base of the fifth transistor Q5, i.e., the base of the fifth transistor Q5 can be changed from high level to low level after a certain time (for example, 1ms), so as to delay the time when the fifth transistor Q5 changes to the saturated conducting state. In the above process, the fourth transistor Q4 has been turned off due to the high level of the first control signal output terminal L _ out1, and since the emitter of the fifth transistor Q5 is connected to the collector of the fourth transistor Q4, the emitter voltage of the fifth transistor Q5 cannot be greater than the base voltage (i.e., the base voltage is 0.3V at this time) after the fourth transistor Q4 is turned off, so that the fifth transistor Q5 is also turned off.
When a switch of the switch circuit is opened after being closed for the third time, the switch circuit outputs a control voltage to the level control circuit, the level control circuit outputs a low-level first control signal to the cut-off circuit according to the received control voltage and outputs a high-level second control signal to the delay circuit, the delay circuit delays and outputs the high-level second control signal output by the level control circuit to the cut-off circuit, the cut-off circuit outputs a feedback voltage to the level control circuit according to the low-level first control signal output by the level control circuit and the high-level second control signal output by the delay circuit in the charging process, and the level control circuit controls the first control signal and the second control signal to be high-level according to the feedback voltage, so that the LED lamp circuit controls the first diode to extinguish according to the first control signal with high level and controls the second diode to extinguish according to the second control signal with high level, and the circuit returns to the initial power-on state.
Specifically, for example, in the circuit shown in fig. 2, when the switch of the switch circuit 10 is opened after being closed for the third time, since the voltage across the second capacitor C2 cannot change suddenly, the switch circuit 10 may output the control voltage VCC to the level control circuit 20 through the second capacitor C2, so that the emitter junction of the first transistor Q1 is turned on through the control voltage VCC. Similarly to the first closing, the second transistor Q2 is turned on in saturation, and the output terminal L _ out1 of the first control signal can output the first control signal with a low level, so that the output terminal L _ out2 of the second control signal outputs the second control signal with a high level. At this time, the delay circuit 30 may delay the high level of the second control signal output from the output terminal L _ out2 of the second control signal to the cut-off circuit 40 due to the level change of the output terminal L _ out2 of the second control signal. Specifically, due to the RC charging delay of the C1 and the R3, the process of the output terminal L _ out2 of the second control signal going from low level to high level is delayed to the base of the fifth transistor Q5, i.e., the base of the fifth transistor Q5 goes from low level to high level after a certain time (approximately equal to the charging time of R3 and C1), so that the fifth transistor Q5 is in a conducting state during the charging time. In the above process, the fourth transistor Q4 is also in a conducting state due to the output terminal L _ out1 of the first control signal outputting the low level first control signal, i.e., there is a case where the fourth transistor Q4 and the fifth transistor Q5 are in a saturated conducting state at the same time.
In the case where both the fourth transistor Q4 and the fifth transistor Q5 are turned on, the turn-off circuit 40 outputs a feedback voltage to the third diode D3 and the resistor R12 in the level control circuit 20. It should be noted that, here, the feedback voltage output by the cut-off circuit 40 to the level control circuit 20 is a voltage capable of cutting off the diode or transistor in the level control circuit 20, and in the circuit shown in fig. 2 in this example, the feedback voltage may be a feedback voltage of 0.6V (i.e., a saturation voltage drop of the fourth transistor Q4 and the fifth transistor Q5) for cutting off the third diode D3. Since the on-voltage of the third diode D3 is 0.7V, the third diode D3 is turned off, the second transistor Q2 is turned off, and the first transistor Q1 is turned off, the output terminal L _ out1 of the first control signal can output the first control signal with a high level, so that the fourth transistor Q4 and the fifth transistor Q5 are both turned off. At this time, the LED lamp circuit 50 turns off both the first diode D1 and the second diode D2 in response to the first control signal and the second control signal at high levels, and the circuit returns to a state in accordance with the initial state of power-on of the circuit.
The embodiment of the invention has the following beneficial effects: the LED lamp control circuit outputs control voltage to the level control circuit through the switch circuit, the level control circuit respectively outputs a first control signal and a second control signal to the cut-off circuit, the delay circuit and the LED lamp circuit according to the control voltage output by the switch circuit, the delay circuit outputs the second control signal output by the level control circuit to the cut-off circuit in a delay mode, the cut-off circuit outputs feedback voltage to the level control circuit according to the first control signal and the second control signal output by the level control circuit and the delay circuit, the level control circuit controls the first control signal and the second control signal according to the feedback voltage, the LED lamp circuit respectively controls the on and off of the two groups of diodes according to the first control signal and the second control signal output by the level control circuit, and three states of controlling the two groups of LED lamps by one-button keys are achieved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (4)
1. The utility model provides a three grades of LED lamp control circuit of a key, its characterized in that, the circuit includes switch circuit, level control circuit, cuts off circuit, delay circuit, LED lamp circuit, wherein:
the switch circuit is used for outputting a control voltage to the level control circuit;
the level control circuit comprises a first triode, a second triode, a third diode, a first resistor and a second resistor, wherein: the base electrode of the first triode is connected with the output end of the second control signal, the collector electrode of the first triode is connected with the output end of the first control signal, and the emitter electrode of the first triode is grounded; a base electrode of the third triode is connected with the output end of the first control signal, a collector electrode of the third triode is connected with the output end of the second control signal, and an emitting electrode of the third triode is grounded; the base electrode of the second triode is connected with the collector electrodes of the first triode and the third triode, the collector electrode of the second triode is connected with the base electrodes of the first triode and the third triode, and the emitting electrode of the second triode is connected with the negative electrode of the third diode; the anode of the third diode is connected with the circuit power supply, the output end of the first control signal is connected with the circuit power supply through a first resistor, and the output end of the second control signal is connected with the circuit power supply through a second resistor;
the cut-off circuit comprises a fourth triode and a fifth triode, wherein: a base electrode of the fourth triode is connected with the output end of the first control signal, a collector electrode of the fourth triode is connected with an emitting electrode of the fifth triode, and the emitting electrode of the fourth triode is connected with a circuit power supply; a collector of the fifth triode is connected with a cathode of the third diode of the level control circuit;
the delay circuit comprises a third resistor and a first capacitor, wherein: one end of the third resistor is connected with the negative electrode of the first capacitor, and the other end of the third resistor is connected with the output end of the second control signal; the positive electrode of the first capacitor is connected with a circuit power supply, and the negative electrode of the first capacitor is connected with the base electrode of the fifth triode of the cut-off circuit;
the LED lamp circuit comprises two groups of diodes and is used for respectively controlling the on and off of the two groups of diodes according to a first control signal and a second control signal output by the level control circuit.
2. The one-key three-gear LED lamp control circuit according to claim 1, wherein the switch circuit comprises a fourth resistor, a second capacitor, and a switch, wherein:
one end of the switch is connected with the anode of the second capacitor, and the other end of the switch is connected with the base electrode of the first triode of the level control circuit;
one end of the fourth resistor is connected with the anode of the second capacitor, and the other end of the fourth resistor is connected with the output end of the first control signal;
and the negative electrode of the second capacitor is grounded.
3. The one-key three-gear LED lamp control circuit according to claim 1, wherein the LED lamp circuit comprises a first diode and a second diode, wherein:
the anode of the first diode is connected with a circuit power supply, and the cathode of the first diode is connected with the output end of the first control signal;
and the anode of the second diode is connected with a circuit power supply, and the cathode of the second diode is connected with the output end of the second control signal.
4. The one-key three-gear LED lamp control circuit of claim 3,
when the circuit is in a power-on initial state, the level control circuit outputs the first control signal with high level and the second control signal with high level to the LED lamp circuit, so that the LED lamp circuit controls the first diode and the second diode to be extinguished according to the first control signal with high level and the second control signal with high level;
when a switch of the switch circuit is opened after being closed for the first time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with low level and a second control signal with high level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be lightened according to the first control signal with low level and controls the second diode to be extinguished according to the second control signal with high level;
when a switch of the switch circuit is opened after being closed for the second time, the switch circuit outputs control voltage to the level control circuit, and the level control circuit outputs a first control signal with high level and a second control signal with low level to the LED lamp circuit according to the received control voltage, so that the LED lamp circuit controls the first diode to be turned off according to the first control signal with high level and controls the second diode to be turned on according to the second control signal with low level;
when a switch of the switch circuit is opened after being closed for the third time, the switch circuit outputs a control voltage to the level control circuit, the level control circuit outputs a low-level first control signal to the cut-off circuit according to the received control voltage and outputs a high-level second control signal to the delay circuit, the delay circuit delays and outputs the high-level second control signal output by the level control circuit to the cut-off circuit, the cut-off circuit outputs a feedback voltage to the level control circuit according to the low-level first control signal output by the level control circuit and the high-level second control signal output by the delay circuit in the charging process, and the level control circuit controls the first control signal and the second control signal to be high-level according to the feedback voltage, so that the LED lamp circuit controls the first diode to extinguish according to the first control signal with high level and controls the second diode to extinguish according to the second control signal with high level, and the circuit returns to the power-on initial state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510750440.3A CN106658887B (en) | 2015-11-04 | 2015-11-04 | One-key three-gear LED lamp control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510750440.3A CN106658887B (en) | 2015-11-04 | 2015-11-04 | One-key three-gear LED lamp control circuit |
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| CN106658887A CN106658887A (en) | 2017-05-10 |
| CN106658887B true CN106658887B (en) | 2020-01-14 |
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| CN201510750440.3A Active CN106658887B (en) | 2015-11-04 | 2015-11-04 | One-key three-gear LED lamp control circuit |
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| CN109287032A (en) * | 2018-10-15 | 2019-01-29 | 深圳市力生美半导体股份有限公司 | Based on the time-controlled Christmas lamp of mains frequency |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438362A (en) * | 2011-10-11 | 2012-05-02 | 宁波市瑞通新材料科技有限公司 | One key type brightness adjusting device |
| CN202503721U (en) * | 2012-03-06 | 2012-10-24 | 梅玉刚 | One-button module wireless remote control two-path light emitting diode array lamp |
| CN203167366U (en) * | 2013-03-28 | 2013-08-28 | 黄修海 | Backlight circuit and backlight keyboard |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10278250B2 (en) * | 2014-05-30 | 2019-04-30 | Cree, Inc. | Lighting fixture providing variable CCT |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438362A (en) * | 2011-10-11 | 2012-05-02 | 宁波市瑞通新材料科技有限公司 | One key type brightness adjusting device |
| CN202503721U (en) * | 2012-03-06 | 2012-10-24 | 梅玉刚 | One-button module wireless remote control two-path light emitting diode array lamp |
| CN203167366U (en) * | 2013-03-28 | 2013-08-28 | 黄修海 | Backlight circuit and backlight keyboard |
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| CN106658887A (en) | 2017-05-10 |
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