CN216852430U

CN216852430U - Multifunctional LED lamp control circuit

Info

Publication number: CN216852430U
Application number: CN202123357979.2U
Authority: CN
Inventors: 王海浪; 屈环宇
Original assignee: Taizhou Hairui Plastic Lighting Co ltd
Current assignee: Taizhou Hairui Plastic Lighting Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-28
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a multi-functional LED lamp control circuit, belong to the technical field of LED lamp decoration control, this control circuit carries out the whole power supply by supply circuit, wherein, switch circuit is controlled by master control circuit, when detecting function switching button closure, the singlechip just carries out the switching of corresponding control program, according to the output level of the corresponding output interface of corresponding control program control singlechip, and then realize the closure/turn-off control of control switch circuit, and then transmit the control waveform in master control circuit to controlled LED lamp department, realize the stable control of LED lamp; the multifunctional LED lamp control circuit has the advantages of simple structure, reasonable design, stable control and the like.

Description

Multifunctional LED lamp control circuit

Technical Field

The utility model discloses a technical field that relates to LED lamp decoration control especially relates to a multi-functional LED lamp control circuit.

Background

The LED lamp decoration product is formed by connecting a plurality of LED bulbs in parallel, in series or in series-parallel. In terms of light emission color, the LED lamp may be classified into a single color LED lamp, a double color LED lamp, a three color LED lamp, and a four color LED lamp; in terms of structure, the LED lamp may be classified into an LED lamp without a built-in IC and an LED lamp with a built-in IC. The LED lamp is controlled by a controller no matter what type.

The control circuit is an important component of the controller, and the existing controller for the LED lamp has the problems of unstable control, incapability of enabling the LED lamp with the built-in IC to light a preset display effect and the like due to improper hardware design in the control circuit.

Therefore, how to develop a new control circuit to solve the above problems is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a multi-functional LED lamp control circuit to improve control circuit's control stability.

The utility model provides a technical scheme specifically does, a multi-functional LED lamp control circuit, this control circuit includes: the device comprises a main control circuit, a switching circuit and a power supply circuit;

the master control circuit includes: the single chip microcomputer and a function switching button;

one end of the function switching button is grounded, the other end of the function switching button is connected with a control input interface of the single chip microcomputer, the control input interface is internally pulled up to a high level, a control program is written in the single chip microcomputer, and when the function switching button is pressed to be closed, the control program in the single chip microcomputer controls the output level;

one end of the switching circuit is connected with a binding post of the controlled LED lamp, the other end of the switching circuit is connected with an output interface of the single chip microcomputer, and the switching circuit is controlled to be switched on/off according to the output level of the output interface of the single chip microcomputer;

and the output end of the power supply circuit is respectively connected with the power supply interface of the singlechip and the other binding post of the controlled LED lamp to supply power for the main control circuit and the controlled LED lamp.

Preferably, the switch circuit is composed of an NMOS field effect transistor, a second resistor and a third resistor or an NPN triode, a second resistor and a third resistor;

when the switch circuit is composed of an NMOS field effect transistor, a second resistor and a third resistor, a grid electrode of the NMOS field effect transistor is connected with an output interface of the single chip microcomputer after being connected with the third resistor in series, a source electrode of the NMOS field effect transistor is grounded, a drain electrode of the NMOS field effect transistor is connected with one wiring terminal of the controlled LED lamp, one end of the second resistor is connected with one wiring terminal of the controlled LED lamp, and the other end of the second resistor is connected with the other wiring terminal of the controlled LED lamp;

when the switch circuit is composed of an NPN triode, a second resistor and a third resistor, a base electrode of the NPN triode is connected with an output interface of the single chip microcomputer after being connected with the third resistor in series, an emitting electrode of the NPN triode is grounded, a collecting electrode of the NPN triode is connected with one wiring terminal of the controlled LED lamp, one end of the second resistor is connected with one wiring terminal of the controlled LED lamp, and the other end of the second resistor is connected with the other wiring terminal of the controlled LED lamp.

Further preferably, the switch circuit is composed of an NMOS field effect transistor and a second voltage regulator diode or an NPN triode and a second voltage regulator diode;

when the switch circuit is composed of an NMOS field effect transistor and a second voltage-stabilizing diode, the grid electrode of the NMOS field effect transistor is connected with the output interface of the single chip microcomputer, the source electrode of the NMOS field effect transistor is grounded, the drain electrode of the NMOS field effect transistor is connected with a wiring terminal of the controlled LED lamp, the anode of the second voltage-stabilizing diode is grounded, and the cathode of the second voltage-stabilizing diode is connected with the drain electrode of the NMOS field effect transistor;

when the switch circuit is composed of an NPN triode and a second voltage stabilizing diode, the base of the NPN triode is connected with the output interface of the single chip microcomputer, the emitting electrode of the NPN triode is grounded, the collector of the NPN triode is connected with one wiring terminal of the controlled LED lamp, the anode of the second voltage stabilizing diode is grounded, and the cathode of the second voltage stabilizing diode is connected with the collector of the NPN triode.

Further preferably, the switch circuit is composed of a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first PNP triode, a first NPN triode, a second PNP triode, and a second NPN triode;

after one end of the fourth resistor is connected with one end of the fifth resistor in series, the other end of the fourth resistor is connected with the output end of the power supply circuit, and the other end of the fifth resistor is connected with a wiring terminal of the controlled LED lamp;

after one end of the sixth resistor is connected with one end of the seventh resistor in series, the other end of the sixth resistor is connected with the output end of the power supply circuit, and the other end of the seventh resistor is connected with the other binding post of the controlled LED lamp;

the base electrode of the first PNP triode is connected between the fourth resistor and the fifth resistor, the collector electrode of the first PNP triode is connected with a binding post of the controlled LED lamp, and the emitter electrode of the first PNP triode is connected with the output end of the power supply circuit;

a base electrode of the first NPN triode is connected with the eighth resistor in series and then is connected with an output interface of the single chip microcomputer, a collector electrode of the first NPN triode is connected with a binding post of the controlled LED lamp, and an emitter electrode of the first NPN triode is grounded;

the base electrode of the second PNP triode is connected between the sixth resistor and the seventh resistor, the collector electrode of the second PNP triode is connected with the other binding post of the controlled LED lamp, and the emitting electrode of the second PNP triode is connected with the output end of the power supply circuit;

and a base electrode of the second NPN triode is connected with the ninth resistor in series and then is connected with the other output interface of the single chip microcomputer, a collector electrode of the second NPN triode is connected with the other wiring terminal of the controlled LED lamp, and an emitting electrode of the second NPN triode is grounded.

Further preferably, the first PNP triode and the second PNP triode can both be replaced by PMOS fets, and the first NPN triode and the second NPN triode can both be replaced by NMOS fets.

Further preferably, the single chip microcomputer in the main control circuit is a single chip microcomputer with an EEPROM storage medium built in.

Further preferably, the main control circuit further includes: a first filter capacitor and a second filter capacitor;

after the first filter capacitor and the second filter capacitor are connected in parallel, one end of the first filter capacitor is connected with a power supply interface of the single chip microcomputer, and the other end of the first filter capacitor is connected with a grounding interface of the single chip microcomputer.

Further preferably, the main control circuit further comprises: a crystal oscillator, a third capacitor and a fourth capacitor;

two ends of the crystal oscillator are respectively connected with a clock interface of the singlechip;

one end of the third capacitor is connected with one end of the crystal oscillator, and the other end of the third capacitor is grounded;

one end of the fourth capacitor is connected with the other end of the crystal oscillator, and the other end of the fourth capacitor is grounded.

Further preferably, the power supply circuit includes: the voltage-stabilizing circuit comprises a first diode, a voltage-reducing resistor and a voltage-stabilizing diode;

the anode of the first diode is connected with an external input power supply, and the cathode of the first diode is connected with the other wiring terminal of the controlled LED lamp;

one end of the voltage reduction resistor is connected with the cathode of the first diode, and the other end of the voltage reduction resistor is connected with a power supply interface of the single chip microcomputer;

the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is connected with the other end of the voltage reducing resistor.

The utility model provides a multi-functional LED lamp control circuit carries out whole power supply by supply circuit, wherein, switch circuit is controlled by master control circuit, detect the function switch button closure whenever, and the singlechip just carries out corresponding control program's switching, and according to the output level of the control program control singlechip output interface that corresponds, and then realize control switch circuit's closure/turn-off control, and then transmit the control waveform in the master control circuit to controlled LED lamp department, realize the stable control of LED lamp.

The utility model provides a multi-functional LED lamp control circuit has advantages such as simple structure, reasonable in design, control are stable.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic block diagram of a multifunctional LED lamp control circuit according to an embodiment of the present disclosure;

fig. 2 is a circuit diagram of a main control circuit in a multifunctional LED lamp control circuit provided in an embodiment of the present disclosure;

fig. 3 is a circuit diagram of a first switch circuit in a multifunctional LED lamp control circuit according to an embodiment of the present disclosure;

fig. 4 is a circuit diagram of a second switch circuit in a multifunctional LED lamp control circuit according to an embodiment of the present disclosure;

fig. 5 is a circuit diagram of a third switch circuit in the multifunctional LED lamp control circuit according to an embodiment of the present disclosure;

fig. 6 is a circuit diagram of a power supply circuit in a multifunctional LED lamp control circuit according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.

In order to solve the problem of poor control stability of the conventional control circuit, referring to fig. 1, the present embodiment provides a novel multifunctional LED lamp control circuit, which mainly comprises a main control circuit 1, a switch circuit 2 and a power supply circuit 3, wherein the power supply circuit 3 is used for supplying power to the main control circuit 1, the switch circuit 2 and a controlled LED lamp L.

Referring to fig. 2, the main control circuit 1 mainly comprises a single chip microcomputer U1 and a function switching button K1, wherein one end of the function switching button K1 is grounded, the other end of the function switching button K1 is connected with a control input interface of the single chip microcomputer U1, the control input interface is internally pulled up to a high level, a control program is written in the single chip microcomputer U1, and when the function switching button K1 is pressed to be closed, the control program in the single chip microcomputer U1 controls the output level;

referring to fig. 1, one end of the switch circuit 2 is connected to a terminal of the controlled LED lamp L, and the other end is connected to the output interface of the single chip microcomputer U1, and the switch circuit 2 is controlled to be turned on/off according to the output level of the output interface of the single chip microcomputer U1.

The output end of the power supply circuit 3 is respectively connected with the power supply interface of the singlechip U1 and the other binding post of the controlled LED lamp L to supply power for the main control circuit 1 and the controlled LED lamp L.

The specific working process of the multifunctional LED lamp control circuit provided by the embodiment is as follows: carry out whole power supply by power supply circuit, wherein, switch circuit is controlled by master control circuit, whenever function switch button is closed, control input interface all switches on with ground, control input interface converts the low level into by the high level, consequently, whenever function switch is closed, the singlechip all can detect control input interface input low level, at this moment, the singlechip just carries out the switching of corresponding control program, the output level according to corresponding control program control singlechip output interface, including should export high level or export low level and high, switching cycle between the low level etc. and then control switch circuit's closure/turn-off, transmit the control waveform in the master control circuit to controlled LED lamp department, make the LED lamp shine predetermined display effect, realize the stable control of LED lamp.

The control programs burnt in the single chip microcomputer U1 are all existing control programs, the corresponding control programs can be burnt in the single chip microcomputer U1 according to the actual function requirements of the LED lamp, the control programs in the single chip microcomputer U1 can be erased and written for multiple times so as to meet different control requirements, and as an improvement of the technical scheme, the single chip microcomputer U1 is a single chip microcomputer with an EEPROM storage medium.

In order to cooperate with the implementation of different control functions, as an improvement of the technical solution, referring to fig. 2, a crystal oscillator related element is further disposed in the main control circuit 1, and specifically includes: the circuit comprises a crystal oscillator X1, a third capacitor C4 and a fourth capacitor C5, wherein two ends of the crystal oscillator X1 are respectively connected with a clock interface of the single chip microcomputer U1, one end of the third capacitor C4 is connected with one end of the crystal oscillator X1, the other end of the third capacitor C4 is grounded, one end of the fourth capacitor C5 is connected with the other end of the crystal oscillator X1, and the other end of the fourth capacitor C5 is grounded.

Corresponding switch circuit structures can be correspondingly arranged for the switch circuit 2 according to the control requirements of the controlled LED lamp, the embodiment specifically provides 3 switch circuits 2 with different structures, and the specific structures of the 3 switch circuits 2 are explained one by one.

1) For LED lamp string with controlled voltage of two levels of 0V and vccV

Referring to fig. 3, the switch circuit 2 is composed of an NMOS fet Q1, a second resistor R2, and a third resistor R3, or an NPN triode, a second resistor R2, and a third resistor R3.

When the switch circuit 2 is composed of the NMOS field-effect transistor Q1, the second resistor R2 and the third resistor R3, after the gate of the NMOS field-effect transistor Q1 is connected in series with the third resistor R3, the gate is connected with the output interface of the single chip microcomputer U1, the source of the NMOS field-effect transistor Q1 is grounded, the drain of the NMOS field-effect transistor Q1 is connected with the negative terminal of the controlled LED lamp L, one end of the second resistor R2 is connected with the positive terminal of the controlled LED lamp L, and the other end of the second resistor R2 is connected with the negative terminal of the controlled LED lamp L, so as to release the electric energy remained in the controlled LED lamp L.

When the switch circuit 2 is composed of an NPN triode, a second resistor R2 and a third resistor R3, a base of the NPN triode is connected in series with the third resistor R3 and then connected with an output interface of the single chip microcomputer U1, an emitter of the NPN triode is grounded, a collector of the NPN triode is connected with a negative terminal of the controlled LED lamp L, one end of the second resistor R2 is connected with a positive terminal of the controlled LED lamp L, and the other end of the second resistor R2 is connected with a negative terminal of the controlled LED lamp L, and is used for releasing electric energy remaining in the controlled LED lamp L.

Corresponding to the two switch circuits, the output end of the power supply circuit 3 is connected to the positive terminal of the controlled LED lamp L.

The two switch circuits respectively use NMOS field effect transistors or NPN triode as control switches to realize the on/off of the circuits, and the specific working process is as follows: when the output interface of the single chip microcomputer U1 outputs a high level to the third resistor R3 and the switch circuit 2 is closed, the NMOS field effect transistor/NPN triode is conducted, the power supply circuit supplies power to the LED lamp, and the power supply voltage is vcCV; when the output interface of the singlechip U1 outputs a low level to the third resistor R3 and the switch circuit 2 is turned off, the NMOS field effect transistor/NPN triode is turned off, the LED lamp is not powered, the power supply voltage is 0V, and then the transmission of a vcCV or 0V control waveform to the LED lamp is realized.

In the LED lamp with the built-in IC, the IC receives the carrier signal, the frequency of the carrier signal is high, and the key physical factor for correctly receiving the carrier signal is whether the rising edge or the falling edge of the signal is steep enough, so that the residual electric energy in the controlled LED lamp is released through the second resistor R2, the carrier signal is switched between vcCV and 0V, and the correct receiving of the carrier signal by the LED lamp can be realized.

2) For LED lamp string with controlled voltage of two levels of (vcc-n) V and vccV

Referring to fig. 4, the switching circuit 2 is composed of an NMOS fet Q2 and a second zener diode D2 or an NPN triode and a second zener diode D2.

When the switch circuit 2 is composed of the NMOS field-effect transistor Q2 and the second voltage-stabilizing diode D2, the gate of the NMOS field-effect transistor Q2 is connected with the output interface of the single chip microcomputer U1, the source of the NMOS field-effect transistor Q2 is grounded, the drain of the NMOS field-effect transistor Q2 is connected with the negative terminal of the controlled LED lamp L, the positive electrode of the second voltage-stabilizing diode D2 is grounded, and the negative electrode of the second voltage-stabilizing diode D2 is connected with the drain of the NMOS field-effect transistor.

When the switch circuit 2 is composed of an NPN triode and a second voltage-stabilizing diode D2, the base of the NPN triode is connected to the output interface of the single chip microcomputer U1, the emitter of the NPN triode is grounded, the collector of the NPN triode is connected to the negative pole post of the controlled LED lamp L, the anode of the second voltage-stabilizing diode D2 is grounded, and the cathode of the second voltage-stabilizing diode D2 is connected to the collector of the NPN triode.

The two switch circuits respectively use NMOS field effect transistors or NPN triode as control switches to realize the on/off of the circuits, and the specific working process is as follows: when the output interface of the single chip microcomputer U1 outputs high level and the switch circuit 2 is closed, the NMOS field effect transistor/NPN triode is conducted, the voltage of the cathode of the LED lamp is close to the ground voltage, and the voltage of the two ends of the LED lamp is close to the vccV voltage; when the output interface of the singlechip U1 outputs low level and the switch circuit 2 is turned off, the NMOS field effect transistor/NPN triode is turned off, the voltage of the cathode of the LED lamp is close to the voltage of the second voltage stabilizing diode D2(nV), the voltage of the two ends of the LED lamp is close to the voltage of (vcc-n), and then the transmission of a vcCV or (vcc-n) V control waveform to the LED lamp is realized.

3) Switch circuit capable of supplying positive voltage or negative voltage to LED lamp

Referring to fig. 5, the switch circuit 2 is composed of a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first PNP transistor Q3, a first NPN transistor Q4, a second PNP transistor Q5, and a second NPN transistor Q6.

After one end of the fourth resistor R4 is connected in series with one end of the fifth resistor R5, the other end of the fourth resistor R4 is connected with the output end of the power supply circuit 3, and the other end of the fifth resistor R5 is connected with an L2 binding post of the controlled LED lamp L;

after one end of the sixth resistor R6 is connected in series with one end of the seventh resistor R7, the other end of the sixth resistor R6 is connected with the output end of the power supply circuit 3, and the other end of the seventh resistor R7 is connected with an L1 binding post of the controlled LED lamp L;

the base electrode of the first PNP triode Q3 is connected between the fourth resistor R4 and the fifth resistor R5, the collector electrode of the first PNP triode Q3 is connected with the L1 binding post of the controlled LED lamp L, and the emitter electrode of the first PNP triode Q3 is connected with the output end of the power supply circuit 3;

the base electrode of the first NPN triode Q4 is connected with the eighth resistor R8 in series and then is connected with the PA2 output interface of the single chip microcomputer U1, the collector electrode of the first NPN triode Q4 is connected with the L1 wiring terminal of the controlled LED lamp L, and the emitter electrode of the first NPN triode Q4 is grounded;

the base electrode of the second PNP triode Q5 is connected between the sixth resistor R6 and the seventh resistor R7, the collector electrode of the second PNP triode Q5 is connected with the L2 binding post of the controlled LED lamp L, and the emitter electrode of the second PNP triode Q5 is connected with the output end of the power supply circuit 3;

the base electrode of the second NPN triode Q6 is connected with the output interface of the PA4 of the single chip microcomputer U1 after being connected with the ninth resistor R9 in series, the collector electrode of the second NPN triode Q6 is connected with the L2 wiring terminal of the controlled LED lamp L, and the emitter electrode of the second NPN triode Q6 is grounded.

At this time, when the PA2 output interface of the single chip microcomputer U1 is at a high level and the PA4 output interface is at a low level, the first NPN triode Q4 is turned on, the base voltage of the second PNP triode Q5 is lower than vccV, and the second PNP triode Q5 is also turned on, so that the power supply direction of the controlled LED lamp L is such that the voltage of L2 is greater than the voltage of L1, that is, the LED lamp L is turned on in the forward direction; when the output interface of the PA4 of the single chip microcomputer U1 is at a high level and the output interface of the PA2 is at a low level, the second NPN triode Q6 is turned on, the base voltage of the first PNP triode Q3 is lower than vccV, and the first PNP triode Q3 is also turned on, so that the power supply direction of the LED lamp L is that the voltage of the L1 is greater than the voltage of the L2, that is, the LED lamp L is turned on in the negative direction.

In order to realize the functions, the first PNP triode Q3 and the second PNP triode Q5 can be replaced by PMOS field effect transistors, and the first NPN triode Q4 and the second NPN triode Q6 can be replaced by NMOS field effect transistors; after replacement, the connection positions of the grid electrode, the drain electrode and the source electrode of the PMOS field effect tube are respectively in one-to-one correspondence with the connection positions of the base electrode, the collector electrode and the emitter electrode of the PNP triode, and the connection positions of the grid electrode, the drain electrode and the source electrode of the NMOS field effect tube are respectively in one-to-one correspondence with the connection positions of the base electrode, the collector electrode and the emitter electrode of the NPN triode.

In order to realize the two functions of reverse plug prevention and voltage reduction with the least components, as an improvement of the technical scheme, referring to fig. 6, the power supply circuit 3 mainly comprises a first diode D1, a voltage reduction resistor R1 and a voltage stabilizing diode D3, wherein the anode of the first diode D1 is connected with an external input power supply, the cathode of the first diode D1 is connected with the cathode of the LED lamp L, one end of the voltage reduction resistor R1 is connected with the cathode of the first diode D1, the other end of the voltage reduction resistor R1 is connected with a power supply interface of the single chip microcomputer U1, the anode of the voltage stabilizing diode D3 is grounded, and the cathode of the voltage stabilizing diode D3 is connected with the other end of the voltage reduction resistor R1.

The power supply circuit selects a Schottky diode through the first diode, so that on one hand, the input voltage VIN is slightly reduced to the power supply voltage vcc of the controlled LED lamp L to meet the current requirement of the controlled LED lamp L; on the other hand, the LED lamp protection device also has the function of preventing the power supply from supplying power reversely, and protects the controlled LED lamp L. The power supply voltage vcc is reduced by a voltage reduction resistor R1, and is stabilized by a voltage stabilizing diode D3 to obtain the power supply voltage VDD of the singlechip U1.

As a further improvement of the technical solution, see 2, the main control circuit 1 is further provided with a first filter capacitor C2 and a second filter capacitor C3, wherein after the first filter capacitor C2 and the second filter capacitor C3 are connected in parallel, one end of the first filter capacitor C2 is connected to a power supply interface of the single chip microcomputer U1, and the other end of the first filter capacitor C2 is connected to a ground interface of the single chip microcomputer U1, so that the power supply voltage VDD is filtered and then input to the single chip microcomputer U1 for power supply.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A multifunctional LED lamp control circuit is characterized by comprising: the device comprises a main control circuit (1), a switch circuit (2) and a power supply circuit (3);

the master control circuit (1) comprises: a singlechip (U1) and a function switching button (K1);

one end of the function switching button (K1) is grounded, the other end of the function switching button is connected with a control input interface of the single chip microcomputer (U1), the control input interface is internally pulled up to a high level, a control program is written in the single chip microcomputer (U1), and when the function switching button (K1) is pressed to be closed, the control program in the single chip microcomputer (U1) controls the output level;

one end of the switch circuit (2) is connected with a wiring terminal of the controlled LED lamp (L), the other end of the switch circuit is connected with an output interface of the singlechip (U1), and the switch circuit (2) is controlled to be switched on/off according to the output level of the output interface of the singlechip (U1);

the output end of the power supply circuit (3) is respectively connected with the power supply interface of the single chip microcomputer (U1) and the other binding post of the controlled LED lamp (L) to supply power to the main control circuit (1) and the controlled LED lamp (L).

2. The multifunctional LED lamp control circuit according to claim 1, wherein the switch circuit (2) is composed of an NMOS field effect transistor (Q1), a second resistor (R2) and a third resistor (R3) or composed of an NPN triode, a second resistor (R2) and a third resistor (R3);

when the switch circuit (2) is composed of an NMOS field effect transistor (Q1), a second resistor (R2) and a third resistor (R3), after the grid of the NMOS field effect transistor (Q1) is connected with the third resistor (R3) in series, the grid of the NMOS field effect transistor is connected with an output interface of the single chip microcomputer (U1), the source of the NMOS field effect transistor (Q1) is grounded, the drain of the NMOS field effect transistor (Q1) is connected with a binding post of a controlled LED lamp (L), one end of the second resistor (R2) is connected with one binding post of the controlled LED lamp (L), and the other end of the second resistor (R2) is connected with the other binding post of the controlled LED lamp (L);

when the switch circuit (2) is composed of an NPN triode, a second resistor (R2) and a third resistor (R3), the base electrode of the NPN triode is connected with the third resistor (R3) in series and then connected with the output interface of the single chip microcomputer (U1), the emitting electrode of the NPN triode is grounded, the collecting electrode of the NPN triode is connected with one binding post of the controlled LED lamp (L), one end of the second resistor (R2) is connected with one binding post of the controlled LED lamp (L), and the other end of the second resistor (R2) is connected with the other binding post of the controlled LED lamp (L).

3. The multifunctional LED lamp control circuit according to claim 1, characterized in that the switch circuit (2) is composed of an NMOS field effect transistor (Q2) and a second voltage regulator diode (D2) or an NPN triode and a second voltage regulator diode (D2);

when the switch circuit (2) is composed of an NMOS field effect transistor (Q2) and a second voltage-stabilizing diode (D2), the grid electrode of the NMOS field effect transistor (Q2) is connected with the output interface of the single chip microcomputer (U1), the source electrode of the NMOS field effect transistor (Q2) is grounded, the drain electrode of the NMOS field effect transistor (Q2) is connected with a binding post of a controlled LED lamp (L), the positive electrode of the second voltage-stabilizing diode (D2) is grounded, and the negative electrode of the second voltage-stabilizing diode (D2) is connected with the drain electrode of the NMOS field effect transistor (Q2);

when the switch circuit (2) is composed of an NPN triode and a second voltage-stabilizing diode (D2), the base electrode of the NPN triode is connected with the output interface of the single chip microcomputer (U1), the emitting electrode of the NPN triode is grounded, the collector electrode of the NPN triode is connected with one binding post of a controlled LED lamp (L), the positive electrode of the second voltage-stabilizing diode (D2) is grounded, and the negative electrode of the second voltage-stabilizing diode (D2) is connected with the collector electrode of the NPN triode.

4. The multifunctional LED lamp control circuit according to claim 1, wherein the switch circuit (2) is composed of a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8), a ninth resistor (R9), a first PNP transistor (Q3), a first NPN transistor (Q4), a second PNP transistor (Q5) and a second NPN transistor (Q6);

after one end of the fourth resistor (R4) is connected with one end of the fifth resistor (R5) in series, the other end of the fourth resistor (R4) is connected with the output end of the power supply circuit (3), and the other end of the fifth resistor (R5) is connected with a binding post of the controlled LED lamp (L);

after one end of the sixth resistor (R6) is connected with one end of the seventh resistor (R7) in series, the other end of the sixth resistor (R6) is connected with the output end of the power supply circuit (3), and the other end of the seventh resistor (R7) is connected with the other binding post of the controlled LED lamp (L);

the base electrode of the first PNP triode (Q3) is connected between the fourth resistor (R4) and the fifth resistor (R5), the collector electrode of the first PNP triode (Q3) is connected with a binding post of a controlled LED lamp (L), and the emitter electrode of the first PNP triode (Q3) is connected with the output end of the power supply circuit (3);

the base electrode of the first NPN triode (Q4) is connected with the eighth resistor (R8) in series and then connected with an output interface of the single chip microcomputer (U1), the collector electrode of the first NPN triode (Q4) is connected with a binding post of a controlled LED lamp (L), and the emitter electrode of the first NPN triode (Q4) is grounded;

the base electrode of the second PNP triode (Q5) is connected between the sixth resistor (R6) and the seventh resistor (R7), the collector electrode of the second PNP triode (Q5) is connected with the other binding post of the controlled LED lamp (L), and the emitter electrode of the second PNP triode (Q5) is connected with the output end of the power supply circuit (3);

the base electrode of the second NPN triode (Q6) is connected with the ninth resistor (R9) in series and then connected with the other output interface of the single chip microcomputer (U1), the collector electrode of the second NPN triode (Q6) is connected with the other binding post of the controlled LED lamp (L), and the emitter electrode of the second NPN triode (Q6) is grounded.

5. The multifunctional LED lamp control circuit according to claim 4, wherein the first PNP transistor (Q3) and the second PNP transistor (Q5) are both replaced by PMOS field effect transistors, and the first NPN transistor (Q4) and the second NPN transistor (Q6) are both replaced by NMOS field effect transistors.

6. The multifunctional LED lamp control circuit according to claim 1, characterized in that the single chip microcomputer (U1) in the main control circuit (1) is a single chip microcomputer with built-in EEPROM storage medium.

7. The multifunctional LED lamp control circuit according to claim 1, wherein the main control circuit (1) further comprises: a first filter capacitor (C2) and a second filter capacitor (C3);

after the first filter capacitor (C2) and the second filter capacitor (C3) are connected in parallel, one end of the first filter capacitor is connected with a power supply interface of the single chip microcomputer (U1), and the other end of the first filter capacitor is connected with a grounding interface of the single chip microcomputer (U1).

8. The multifunctional LED lamp control circuit according to claim 1, wherein the main control circuit (1) further comprises: a crystal oscillator (X1), a third capacitor (C4), and a fourth capacitor (C5);

two ends of the crystal oscillator (X1) are respectively connected with a clock interface of the single chip microcomputer (U1);

one end of the third capacitor (C4) is connected with one end of the crystal oscillator (X1), and the other end of the third capacitor is grounded;

one end of the fourth capacitor (C5) is connected with the other end of the crystal oscillator (X1), and the other end is grounded.

9. Multifunctional LED lamp control circuit according to claim 1, characterized in that the power supply circuit (3) comprises: a first diode (D1), a buck resistor (R1), and a zener diode (D3);

the anode of the first diode (D1) is connected with an external input power supply, and the cathode of the first diode (D1) is connected with the other binding post of the controlled LED lamp (L);

one end of the voltage reduction resistor (R1) is connected with the negative electrode of the first diode (D1), and the other end of the voltage reduction resistor (R1) is connected with a power supply interface of the single chip microcomputer (U1);

the anode of the voltage stabilizing diode (D3) is grounded, and the cathode of the voltage stabilizing diode (D3) is connected with the other end of the voltage reducing resistor (R1).