CN213880353U

CN213880353U - Smart home dimming control circuit

Info

Publication number: CN213880353U
Application number: CN202023194080.9U
Authority: CN
Inventors: 郭清腾; 卢凯; 郑榕龙; 李水旺; 黄琦
Original assignee: XIAMEN YADE ELECTRONIC TECHNOLOGY CO LTD
Current assignee: XIAMEN YADE ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-03
Anticipated expiration: 2030-12-25

Abstract

The utility model relates to the technical field of intelligent household dimming control circuits, in particular to an intelligent household dimming control circuit, which comprises an AC-to-DC circuit, a first dimming control circuit, a second dimming control circuit, a first dimming drive circuit, a second dimming drive circuit, a first zero point detection circuit, a second zero point detection circuit, a first load, a second load, a main control circuit, a wireless transmission circuit, a touch control circuit, an indicator lamp control circuit, an induction control circuit, a buzzer control circuit and a vibrator control circuit, wherein the main control circuit is respectively electrically connected with the AC-to-DC circuit, the first dimming drive circuit, the second dimming drive circuit, the first zero point detection circuit, the second zero point detection circuit, the wireless transmission circuit, the touch control circuit, the indicator lamp control circuit, the induction control circuit, the buzzer control circuit and the oscillator control circuit, therefore, the two paths of lamplight can be independently controlled.

Description

Smart home dimming control circuit

Technical Field

The utility model relates to an intelligence house dimming control circuit technical field, in particular to intelligence house dimming control circuit.

Background

The intelligent home is characterized in that various devices (such as lighting, curtains, air conditioner control, a security system, an audio-visual system, household appliances and the like) in the home are connected together through the Internet of things technology, so that multifunctional and means such as lighting control, anti-theft alarm, environment monitoring, heating and ventilation control and the like are provided, home automation and networking are realized, and a comfortable, safe, convenient and efficient living environment is provided for people; one standard 86 box can only be correspondingly assembled with one switch panel, and only two independent dimming controllers can be assembled on the switch panel when the dimming and the switch control of two paths of lamplight can be independently controlled by one switch panel, so that the mode is high in cost for users and complex in assembly for installation personnel.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is an intelligent household dimming control circuit.

In order to solve the technical problem, the utility model discloses a technical scheme be:

an intelligent household dimming control circuit comprises an alternating current-to-direct current circuit, a first dimming control circuit, a second dimming control circuit, a first dimming drive circuit, a second dimming drive circuit, a first zero point detection circuit, a second zero point detection circuit, a first load, a second load, a main control circuit, a wireless transmission circuit, a touch control circuit, an indicator lamp control circuit, an induction control circuit, a buzzer control circuit and a vibrator control circuit, wherein the main control circuit is respectively electrically connected with the alternating current-to-direct current circuit, the first dimming drive circuit, the second dimming drive circuit, the first zero point detection circuit, the second zero point detection circuit, the wireless transmission circuit, the touch control circuit, the indicator lamp control circuit, the induction control circuit, the buzzer control circuit and the oscillator control circuit, and the first dimming control circuit is respectively electrically connected with the alternating current-to-direct current circuit, the first dimming drive circuit, the second dimming control circuit, the wireless transmission circuit, the touch control circuit, the indicator lamp control circuit, the induction control circuit, the buzzer control circuit and the oscillator control circuit, The first load, the first zero point detection circuit and the second dimming control circuit are electrically connected, the second dimming control circuit is respectively electrically connected with the second dimming drive circuit, the second zero point detection circuit and the second load, the first load is electrically connected with the second load, the first load is connected with a zero line of an alternating current power supply, and the first dimming control circuit is connected with a live wire of the alternating current power supply.

The beneficial effects of the utility model reside in that:

the first dimming control circuit and the second dimming control circuit are two control circuits which are isolated from each other and are respectively used for dimming and switching control of a first load and a second load, the first dimming control circuit is controlled by the first dimming drive circuit, the first dimming drive circuit provides drive voltage, and the main control circuit provides PWM control signals; the second dimming control circuit is controlled by a second dimming driving circuit, the second dimming driving circuit provides driving voltage, and the main control circuit provides a PWM control signal; the first zero point detection circuit and the second zero point detection circuit provide commercial power zero-crossing data for the main control circuit, so that the main control circuit outputs accurate PWM control signals, and a soft light control effect is achieved; a wireless transmission module is arranged to realize wireless intelligent control; setting a touch circuit to realize manual touch control; an indicator lamp control circuit, a buzzer control circuit and a vibrator control circuit are arranged to realize control state indication and feedback; the dimming control circuit designed by the scheme can realize independent control of two paths of lamplight.

Drawings

Fig. 1 is a circuit connection block diagram of an intelligent home dimming control circuit according to the present invention;

fig. 2 is a schematic circuit diagram of a first dimming control circuit and a second dimming control circuit of an intelligent home dimming control circuit according to the present invention;

fig. 3 is a schematic circuit diagram of a first dimming driving circuit and a second dimming driving circuit of an intelligent home dimming control circuit according to the present invention;

fig. 4 is a schematic circuit diagram of a first dimming driving circuit and a second dimming driving circuit of an intelligent home dimming control circuit according to the present invention;

fig. 5 is a schematic circuit diagram of a first zero detection circuit of the smart home dimming control circuit according to the present invention;

fig. 6 is a schematic circuit diagram of a second zero detection circuit of the smart home dimming control circuit according to the present invention;

fig. 7 is a schematic circuit diagram of an inductive control circuit of an intelligent household dimming control circuit according to the present invention;

fig. 8 is a schematic circuit diagram of a touch circuit of an intelligent household dimming control circuit according to the present invention;

fig. 9 is a schematic circuit diagram of an indicator light control circuit of an intelligent home dimming control circuit according to the present invention;

fig. 10 is a schematic circuit diagram of a buzzer control circuit of an intelligent household dimming control circuit according to the present invention;

fig. 11 is a schematic circuit diagram of a vibrator control circuit of an intelligent home dimming control circuit according to the present invention;

fig. 12 is a schematic circuit diagram of a main control circuit of an intelligent home dimming control circuit according to the present invention;

fig. 13 is a schematic circuit diagram of an ac-to-dc power supply circuit of an intelligent household dimming control circuit according to the present invention;

description of reference numerals:

1. an AC-to-DC power supply circuit; 2. a first dimming control circuit; 3. a second dimming control circuit; 4. a first dimming drive circuit; 5. a second dimming driving circuit; 6. a first zero point detection circuit; 7. a second zero point detection circuit; 8. a first load; 9. a second load; 10. a master control circuit; 11. a wireless transmission circuit; 12. a touch circuit; 13. an indicator light control circuit; 14. an induction control circuit; 15. a buzzer control circuit; 16. a vibrator control circuit.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, the present invention provides a technical solution:

From the above description, the beneficial effects of the present invention are:

Further, the first dimming control circuit comprises a resistor R40, a resistor R72, a resistor R73, a capacitor C17, a diode D8, a diode D9, a diode D14, a voltage regulator DZ4, a voltage regulator DZ5, a field effect transistor Q4 and a field effect transistor Q4, wherein a source of the field effect transistor Q4 is electrically connected with an anode of the diode D4 and one end of the resistor R4, the other end of the resistor R4 is electrically connected with one end of the capacitor C4, the other end of the capacitor C4 is electrically connected with a source of the field effect transistor Q4 and an anode of the diode D4, a cathode of the diode D4 is electrically connected with a cathode of the diode D4 and a cathode of the diode D4, a gate of the field effect transistor Q4 is electrically connected with one end of the resistor R4, one end of the voltage regulator DZ4, a cathode of the voltage regulator DZ4, a gate of the voltage regulator DZ4, and a gate of the diode Q4, and the anode of the voltage regulator D4 are electrically connected with a cathode of the diode D4, The anode of the voltage regulator tube DZ5, the other end of the resistor R73, the other end of the resistor R72, the drain electrode of the field effect tube Q9 and the drain electrode of the field effect tube Q4 are electrically connected.

As can be seen from the above description, the gates of the fet Q9 and the fet Q4 are connected to the first dimming driving control circuit, the first dimming control circuit outputs a PWM control signal with a frequency of 100Hz to control the on and off of the fet Q9 and the fet Q4, and when the fet Q9 and the fet Q4 are turned on, the positive half-cycle current of the live wire passes through the fet Q9 and the internal diode of the fet Q4 to form a loop with the first load; the negative half-cycle current of the live wire passes through a diode in the field effect transistor Q4 and a field effect transistor Q9 to form a loop with the first load; when the output PWM pulse width of the first dimming control circuit is large, the conduction time of the field effect transistor Q9 and the field effect transistor Q4 is long, the input voltage of the first load is large, and the brightness of the first load is bright; when the output PWM pulse width of the first dimming control circuit is small, the conduction time of the field effect transistor Q9 and the field effect transistor Q4 is short, the input voltage of the first load is small, and the brightness of the first load is dark, so that the function of controlling the brightness adjustment of the first load is achieved; the resistor R40 and the capacitor C17 form an RC network to inhibit power supply interference; when the field effect transistor Q9 and the field effect transistor Q4 are cut off, the diode D4 and the diode D8 form a rectifier to supply power for the AC-DC circuit, and meanwhile, a detection signal is provided for the zero point detection of the commercial power; the resistor R72 and the voltage regulator DZ4 are used for grid voltage suppression of the field effect transistor Q9; the resistor R73 and the voltage regulator DZ5 are used for grid voltage suppression of the field effect transistor Q4; and the transient suppression diode D14 is used for absorbing the mains input surge voltage.

Further, the second dimming control circuit includes a resistor R43, a resistor R74, a resistor R75, a varistor RV3, a capacitor C19, a diode D10, a diode D11, a voltage regulator DZ 11, a field effect transistor Q11 and a field effect transistor Q11, a source of the field effect transistor Q11 is electrically connected to an anode of the diode D11, one end of the resistor R11 and one end of the varistor RV 11, a drain of the field effect transistor Q11 is electrically connected to one end of the resistor R11, an anode of the voltage regulator DZ 11 and a source of the field effect transistor Q11, a cathode of the diode D11 is electrically connected to a cathode of the diode D11, a drain of the field effect transistor Q11 is electrically connected to an anode of the diode D11, one end of the capacitor C11 and the other end of the varistor RV 11, and the other end of the resistor R11 are electrically connected to a gate of the field effect transistor Q11, The cathode of the voltage regulator tube DZ3, the cathode of the voltage regulator tube DZ2, the other end of the resistor R74 and the grid of the field effect tube Q5 are electrically connected.

As can be seen from the above description, the second dimming control circuit outputs a PWM control signal with a frequency of 100Hz to control the on and off of the fet Q5 and the fet Q6, and when the fet Q5 and the fet Q6 are turned on, the positive half-cycle current of the live line passes through the internal diodes of the fet Q5 and the fet Q6 to form a loop with the second load; the negative half-cycle current of the live wire passes through a diode in the field effect transistor Q6 and a field effect transistor Q5 and forms a loop with a second load; when the output PWM pulse width of the second dimming control circuit is large, the conduction time of the field effect transistor Q5 and the field effect transistor Q6 is long, the input voltage of the second load is large, and the brightness of the second load is bright; when the output PWM pulse width of the second dimming control circuit is small, the conduction time of the field effect transistor Q5 and the field effect transistor Q6 is short, the input voltage of the second load is small, and the brightness of the second load is dark, so that the function of controlling the brightness adjustment of the second load is achieved; the resistor R43 and the capacitor C19 form an RC network to inhibit power supply interference; when the field effect transistor Q5 and the field effect transistor Q6 are cut off, the diode D10 and the diode D11 form a rectifier to provide a detection signal for the zero point detection of the commercial power; the resistor R74 and the voltage regulator tube DZ2 are used for grid voltage suppression of the field effect tube Q5; the resistor R75 and the voltage regulator tube DZ3 are used for grid voltage suppression of the field effect tube Q6; and the voltage dependent resistor RV3 is used for absorbing the mains supply input surge voltage.

Further, the first dimming driving circuit comprises a resistor R41, a resistor R42, a resistor R62, a capacitor C29, a diode D6 and a phototransistor U6B, wherein a collector of the phototransistor U6B is electrically connected to one end of the capacitor C29, an emitter of the phototransistor U6B is electrically connected to one end of a resistor R42, one end of the resistor R62 and a cathode of the diode D6, the other end of the resistor R62 is electrically connected to the other end of the capacitor C29, the other end of the resistor R62 and the other end of the capacitor C29 are both grounded, an anode of the diode D6 is electrically connected to one end of the resistor R41, and the other end of the resistor R41 is electrically connected to the other end of the resistor R42.

As can be seen from the above description, when the phototransistor U6B is turned on, the voltage is generated by the voltage dividing resistor R62, and the driving resistor R42 provides the on voltage for the fet Q9 and the fet Q4; when the phototriode U6B is cut off, no voltage is generated by the voltage dividing resistor R62, and the field effect transistor Q9 and the field effect transistor Q4 are cut off; the resistor R41 and the diode D6 function as a protection, and the capacitor C29 controls the on and off time of the phototransistor U6B.

Further, the first dimming driving circuit further includes a resistor R51, a resistor R52, a resistor R53, a capacitor C20, a capacitor C21, a light emitting diode U6A, and a field effect transistor Q8, a drain of the field effect transistor Q8 is grounded, a gate of the field effect transistor Q8 is electrically connected to one end of the resistor R53, another end of the resistor R53 is grounded, a source of the field effect transistor Q8 is electrically connected to an anode of the light emitting diode U6A and one end of the resistor R51, another ends of the resistors R51 are electrically connected to one end of the capacitor C20 and one end of the resistor R52, another end of the resistor R52 is electrically connected to one end of the capacitor C21, another end of the capacitor C21 is electrically connected to another end of the capacitor C20, and another ends of the capacitor C21 and the capacitor C20 are both grounded.

As can be seen from the above description, the resistor R51, the resistor R52, the capacitor C20, and the capacitor C21 constitute a power supply circuit for supplying voltage to the led U6A; the main control circuit outputs PWM to control the on and off of a field effect transistor Q8, and when Q8 is switched on, a light emitting diode U6A is switched on; when Q8 is turned off, led U6A is turned off; resistor R53 acts as a pull down.

Further, the second dimming driving circuit comprises a resistor R44, a resistor R45, a resistor R65, a capacitor C30 and a phototransistor U7B, a collector of the phototransistor U7B is electrically connected with one end of the capacitor C30, an emitter of the phototransistor U7B is electrically connected with one end of the resistor R65, one end of the resistor R45 and a cathode of the diode D7 respectively, an anode of the diode D7 is electrically connected with one end of the resistor R44, the other end of the resistor R44 is electrically connected with the other end of the resistor R45, the other end of the resistor R65 is electrically connected with the other end of the capacitor C30, and the other end of the resistor R65 and the other end of the capacitor C30 are both grounded.

As can be seen from the above description, when the phototransistor U7B is turned on, the voltage is generated by the voltage dividing resistor R65, and the driving resistor R45 provides the on voltage for the fet Q5 and the fet Q6; when the phototriode U7B is cut off, no voltage is generated by the voltage dividing resistor R45, and the field effect transistor Q5 and the field effect transistor Q6 are cut off; the resistor R44 and the diode D7 are used for protection, and the capacitor C30 controls the on and off time of the phototransistor U7B.

Further, the second dimming driving circuit further includes a resistor R47, a resistor R48, a resistor R49, a capacitor C13, a capacitor C18, a light emitting diode U7A, and a field effect transistor Q3, a gate of the field effect transistor Q3 is electrically connected to one end of the resistor R49, the other end of the resistor R49 is grounded, a drain of the field effect transistor Q3 is grounded, a source of the field effect transistor Q3 is electrically connected to a cathode of the light emitting diode U7A, an anode of the light emitting diode U7A is electrically connected to one end of the resistor R48, the other ends of the resistors R48 are electrically connected to one end of the resistor R47 and one end of the capacitor C18, the other end of the resistor R47 is electrically connected to one end of the capacitor C13, the other end of the capacitor C13 is electrically connected to the other end of the capacitor C18, and the other ends of the capacitor C13 and the capacitor C18 are both grounded.

As can be seen from the above description, the resistor R47, the resistor R48, the capacitor C13, and the capacitor C18 constitute a power supply circuit for supplying voltage to the led U7A; the main control circuit outputs PWM to control the on and off of a field effect transistor Q3, and when Q3 is switched on, a light emitting diode U7A is switched on; when Q3 is turned off, led U7A is turned off; resistor R49 acts as a pull down.

Further, the first zero point detection circuit comprises a resistor R54, a resistor R55, a resistor R56, a capacitor C22, a voltage regulator DZ1 and a photoelectric coupler OC1, wherein a first end of the photoelectric coupler OC1 is electrically connected with one end of the resistor R55, the other end of the resistor R55 is electrically connected with one end of the resistor R54, the other end of the resistor R54 is electrically connected with an anode of the voltage regulator DZ1, a third end of the photoelectric coupler OC1 is electrically connected with one end of the resistor R56 and one end of the capacitor C22 respectively, the other end of the resistor R56 is connected with the power supply, a fourth end of the photoelectric coupler OC1 is electrically connected with the other end of the capacitor C22, and the fourth end of the photoelectric coupler OC1 and the other end of the capacitor C22 are both grounded.

As can be seen from the above description, the voltage regulator DZ1, the resistor R54 and the resistor R55 form a voltage reduction circuit for reducing voltage, when the mains supply input voltage is greater than 12V, the opto-coupler OC1 is turned on, and the PIN24 is at a low level; when the mains supply input voltage is less than 12V, the photoelectric coupler OC1 is cut off, the PIN24 is at a high level, the first load loop mains supply zero time is judged according to the period, and the resistor R56 plays a role in limiting current.

Further, the second zero point detection circuit includes a resistor R57, a resistor R58, a resistor R59, a capacitor C23, a voltage regulator DZ6 and a photocoupler OC2, a first end of the photocoupler OC2 is electrically connected to one end of the resistor R58, the other end of the resistor R58 is electrically connected to one end of the resistor R57, the other end of the resistor R57 is electrically connected to an anode of the voltage regulator DZ6, a second end of the photocoupler OC2 is grounded, a third end of the photocoupler OC2 is electrically connected to one end of the resistor R59 and one end of the capacitor C23, the other end of the resistor R59 is connected to the power supply, a fourth end of the photocoupler OC2 is electrically connected to the other end of the capacitor C23, and a fourth end of the photocoupler OC2 and the other end of the capacitor C23 are both grounded.

As can be seen from the above description, the voltage regulator DZ6, the resistor R57 and the resistor R58 form a voltage reduction circuit for reducing voltage, when the mains supply input voltage is greater than 12V, the opto-coupler OC2 is turned on, and the PIN23 is at a low level; when the mains supply input voltage is smaller than 12V, the photoelectric coupler OC2 is cut off, the PIN23 is at a high level, the second load loop mains supply zero time is judged according to the period, and the resistor R59 plays a role in limiting current.

Further, the induction control circuit comprises a resistor R32, a resistor R34, a resistor R76, a capacitor C15, a capacitor C16, a capacitor C25, a capacitor C27, a capacitor C28 and a chip U3, the first pin of the chip U3 is electrically connected with one end of a resistor R32, the second pin of the chip U3 is electrically connected with one end of a capacitor C15, one end of a capacitor C27, one end of a capacitor C16 and one end of a capacitor C28 respectively, the second pin of the chip U3, one end of the capacitor C15, one end of a capacitor C27, one end of the capacitor C25, one end of a capacitor C16 and one end of the capacitor C28 are all grounded, the fourth pin of the chip U3 is electrically connected to the other end of the capacitor C15 and the other end of the capacitor C27, the fifth pin of the chip U3 is electrically connected with the other end of the capacitor C16, one end of the resistor R76 and the other end of the capacitor C28 respectively, the sixth pin of the chip U3 is electrically connected to one end of a resistor R34, and the other end of the resistor R34 is electrically connected to the other end of a capacitor C25.

As can be seen from the above description, the chip U3 is a fully integrated capacitive sensor, and the resistor R76, the capacitor C16 and the capacitor C28 form a power supply circuit to provide a stable voltage for the chip U3; the capacitor C15 and the capacitor C27 are bypass capacitors connected with pins of a voltage stabilizer in the chip U3; the resistor R34, the capacitor C25 and the PCB coil CX form a capacitive touch circuit which provides a touch signal for the chip U3; the pin D1 and the pin D2 output control signals, and the resistor R32 plays a pull-up role.

Referring to fig. 1 to 13, a first embodiment of the present invention is:

referring to fig. 1, an intelligent home dimming control circuit includes an ac-to-dc conversion circuit, a first dimming control circuit 2, a second dimming control circuit 3, a first dimming driving circuit 4, a second dimming driving circuit 5, a first zero point detection circuit 6, a second zero point detection circuit 7, a first load 8, a second load 9, a main control circuit 10, a wireless transmission circuit 11, a touch control circuit 12, an indicator lamp control circuit 13, an induction control circuit 14, a buzzer control circuit 15, and a vibrator control circuit 16, where the main control circuit 10 is respectively electrically connected to the ac-to-dc conversion circuit, the first dimming driving circuit 4, the second dimming driving circuit 5, the first zero point detection circuit 6, the second zero point detection circuit 7, the wireless transmission circuit 11, the touch control circuit 12, the indicator lamp control circuit 13, the induction control circuit 14, the buzzer control circuit 15, and the oscillator control circuit, first dimming control circuit 2 changes direct current circuit, first drive circuit 4, first load 8, first zero point detection circuit 6 and the second dimming control circuit 3 electricity with exchanging respectively and adjusts luminance, second dimming control circuit 3 adjusts luminance drive circuit 5, second zero point detection circuit 7 and second load 9 electricity with the second respectively and is connected, first load 8 is connected with second load 9 electricity, first load 8 connects alternating current power supply's zero line, first dimming control circuit 2 connects alternating current power supply's live wire.

Referring TO fig. 2, the first dimming control circuit 2 includes a resistor R40 (having a resistance of 27k Ω), a resistor R72 (having a resistance of 150 Ω), a resistor R73 (having a resistance of 150 Ω), a capacitor C17 (having a capacitance of 120pF), a diode D8 (having a model of F7A SOD-123FL), a diode D9 (having a model of F7A SOD-123FL), a diode D14 (having a model of P6SMB440A SMB), a regulator DZ4 (having a model of BZT52C6V8 SOD123), a regulator DZ5 (having a model of BZT52C6V8 SOD123), a field effect transistor Q4 (having a model of IPA60R190P 56 TO 220F), and a field effect transistor Q9 (having a model of IPA60R190P6TO TO 220F), wherein a source of the field effect transistor Q9 is electrically connected TO an anode of the diode D8 and one end of the resistor R40, and another end of the resistor R40 is electrically connected TO one end of the capacitor C40, and another end of the diode 40 and the other end of the diode 40, the cathode of the diode D9 is electrically connected with the cathode of the diode D8 and the cathode of the diode D14, the gate of the field-effect tube Q4 is electrically connected with one end of the resistor R73, the cathode of the voltage-regulator tube DZ5, the cathode of the voltage-regulator tube DZ4, one end of the resistor R72 and the gate of the field-effect tube Q9, the anode of the diode D14 is electrically connected with the anode of the voltage-regulator tube DZ4, the anode of the voltage-regulator tube DZ5, the other end of the resistor R73, the other end of the resistor R72, the drain of the field-effect tube Q9 and the source of the field-effect tube Q4.

Referring TO fig. 2, the second dimming control circuit 3 includes a resistor R43 (having a resistance of 27k Ω), a resistor R74 (having a resistance of 150 Ω), a resistor R75 (having a resistance of 150 Ω), a varistor RV3 (model TVR07471KLARM), a capacitor C19 (having a capacitance of 120pF), a diode D10 (model F7A SOD-123FL), a diode D11 (model F7A SOD-123FL), a zener DZ2 (model BZT52C6V8 SOD123), a zener DZ3 (model BZT52C6V8 SOD123), a field-effect transistor Q5 (model IPA60R190P6TO 220F), and a field-effect transistor Q6 (model IPA60R190P 66 TO 220F), wherein a source of the field-effect transistor Q6 is electrically connected TO an anode of the diode D6, one end of the resistor R6, one end of the fet 6, and one end of the fet 6 are electrically connected TO an anode of the fet 6, the drain of the fet 6, the cathode of the diode D10 is electrically connected with the cathode of the diode D11, the drain of the field effect transistor Q6 is electrically connected with the anode of the diode D11, one end of the capacitor C19 and the other end of the piezoresistor RV3 respectively, the other end of the resistor R43 is electrically connected with the other end of the capacitor C19, and the gate of the field effect transistor Q6 is electrically connected with the other end of the resistor R75, the cathode of the voltage regulator DZ3, the cathode of the voltage regulator DZ2, the other end of the resistor R74 and the gate of the field effect transistor Q5 respectively.

Referring to fig. 3, the first dimming driving circuit 4 includes a resistor R41 (with a resistance of 150 Ω), a resistor R42 (with a resistance of 750 Ω), a resistor R62 (with a resistance of 150 Ω), a capacitor C29 (with a capacitance of 100nF), a diode D6 (with a model of 1N4148W SOD-123), and a photo-transistor U6B (with a model of LTV-1009-TP1-G SMD-4), the collector of the phototriode U6B is electrically connected with one end of a capacitor C29, the emitter of the phototriode U6B is respectively electrically connected with one end of a resistor R42, one end of a resistor R62 and the cathode of a diode D6, the other end of the resistor R62 is electrically connected with the other end of the capacitor C29, the other end of the resistor R62 and the other end of the capacitor C29 are both grounded, the anode of the diode D6 is electrically connected to one end of the resistor R41, and the other end of the resistor R41 is electrically connected to the other end of the resistor R42.

Referring to fig. 4, the first dimming driving circuit 4 further includes a resistor R51 (with a resistance of 10 Ω), a resistor R52 (with a resistance of 150 Ω), a resistor R53 (with a resistance of 100k Ω), a capacitor C20 (with a capacitance of 10 μ F), a capacitor C21 (with a capacitance of 10 μ F), a light emitting diode U6A (with a model of LTV-1009-TP1-G SMD-4), and a field effect transistor Q8 (with a model of DMN3404L SOT23), a drain of the field effect transistor Q8 is grounded, a gate of the field effect transistor Q8 is electrically connected to one end of the resistor R53, another end of the resistor R53 is grounded, a source of the field effect transistor Q8 is electrically connected to an anode of the light emitting diode U6A and one end of the resistor R51, another end of the resistor R51 is electrically connected to one end of the capacitor C20 and one end of the resistor R52, another end of the resistor R52 is electrically connected to one end of the capacitor C21, another end of the capacitor C21 and another capacitor C21 are electrically connected to the other end of the capacitor C21 The ends are all grounded.

Referring to fig. 3, the second dimming driving circuit 5 includes a resistor R44 (with a resistance of 150 Ω), a resistor R45 (with a resistance of 750 Ω), a resistor R65 (with a resistance of 150 Ω), a capacitor C30 (with a capacitance of 100nF), and a phototransistor U7B (with a model number LTV-1009-TP1-G SMD-4), a collector of the phototransistor U7B is electrically connected to one end of the capacitor C30, an emitter of the phototransistor U7B is electrically connected to one end of a resistor R65, one end of the resistor R45, and a cathode of a diode D7, an anode of the diode D7 is electrically connected to one end of a resistor R44, another end of the resistor R44 is electrically connected to another end of a resistor R45, another end of the resistor R65 is electrically connected to another end of the capacitor C30, and another end of the resistor R65 and another end of the capacitor C30 are both grounded.

Referring to fig. 4, the second dimming driving circuit 5 further includes a resistor R47 (with a resistance of 150 Ω), a resistor R48 (with a resistance of 10 Ω), a resistor R49 (with a resistance of 100k Ω), a capacitor C13 (with a capacitance of 10 μ F), a capacitor C18 (with a resistance of 10 μ F), a light emitting diode U7A (with a model of LTV-1009-TP1-G SMD-4), and a field effect transistor Q3 (with a model of DMN3404L SOT23), wherein a gate of the field effect transistor Q3 is electrically connected to one end of the resistor R49, the other end of the resistor R49 is grounded, a drain of the field effect transistor Q3 is grounded, a source of the field effect transistor Q3 is electrically connected to a cathode of the light emitting diode U7A, an anode of the light emitting diode U7A is electrically connected to one end of the resistor R48, the other ends of the resistor R48 are electrically connected to one end of the resistor R47 and one end of the capacitor C18, and the other end of the resistor R47 is electrically connected to one end of the capacitor C67 13, the other end of the capacitor C13 is electrically connected with the other end of the capacitor C18, and the other ends of the capacitor C13 and the capacitor C18 are both grounded.

Referring to fig. 5, the first zero point detection circuit 6 includes a resistor R54 (with a resistance of 510k Ω), a resistor R55 (with a resistance of 510k Ω), a resistor R56 (with a resistance of 51k Ω), a capacitor C22 (with a capacitance of 4.7/1nF), a voltage regulator DZ1 (model number BZT52C12V SOD123), and a photo-coupler OC1 (model number LTV-1009-TP1-G SMD-4), a first end of the photoelectric coupler OC1 is electrically connected with one end of a resistor R55, the other end of the resistor R55 is electrically connected with one end of a resistor R54, the other end of the resistor R54 is electrically connected with the anode of the voltage regulator tube DZ1, the third end of the photoelectric coupler OC1 is respectively and electrically connected with one end of the resistor R56 and one end of the capacitor C22, the other end of the resistor R56 is connected with a power supply, the fourth end of the photoelectric coupler OC1 is electrically connected with the other end of the capacitor C22, and the fourth end of the photoelectric coupler OC1 and the other end of the capacitor C22 are both grounded.

Referring to fig. 6, the second zero point detection circuit 7 includes a resistor R57 (with a resistance of 510k Ω), a resistor R58 (with a resistance of 510k Ω), a resistor R59 (with a resistance of 51k Ω), a capacitor C23 (with a capacitance of 4.7/1nF), a voltage regulator DZ6 (model number BZT52C12V SOD123), and a photo-coupler OC2 (model number LTV-1009-TP1-G SMD-4), a first end of the photoelectric coupler OC2 is electrically connected with one end of a resistor R58, the other end of the resistor R58 is electrically connected with one end of a resistor R57, the other end of the resistor R57 is electrically connected with the anode of a voltage regulator tube DZ6, the second end of the photoelectric coupler OC2 is grounded, the third end of the photoelectric coupler OC2 is respectively and electrically connected with one end of a resistor R59 and one end of a capacitor C23, the other end of the resistor R59 is connected with a power supply, the fourth end of the photoelectric coupler OC2 is electrically connected with the other end of the capacitor C23, and the fourth end of the photoelectric coupler OC2 and the other end of the capacitor C23 are both grounded.

Referring to fig. 7, the sensing control circuit 14 includes a resistor R32 (with a resistance of 4.7k Ω), a resistor R34 (with a resistance of 470 Ω), a resistor R76 (with a resistance of 0 Ω), a capacitor C15 (with a capacitance of 1uF), a capacitor C16 (with a capacitance of 1uF), a capacitor C25 (with a capacitance of 1uF), a capacitor C27 (with a capacitance of 1uF), a capacitor C28 (with a capacitance of 1uF) and a chip U3 (with a model of IQS128), a first pin of the chip U3 is electrically connected to one end of the resistor R32, a second pin of the chip U3 is electrically connected to one end of the capacitor C15, one end of the capacitor C27, one end of the capacitor C16 and one end of the capacitor C28, a second pin of the chip U3, one end of the capacitor C15, one end of the capacitor C27, one end of the capacitor C25, one end of the capacitor C16 and one end of the capacitor C28 are all grounded, a first pin of the chip U6867 is electrically connected to the other end of the capacitor C36 32, the fifth pin of the chip U3 is electrically connected with the other end of the capacitor C16, one end of the resistor R76 and the other end of the capacitor C28 respectively, the sixth pin of the chip U3 is electrically connected with one end of the resistor R34, and the other end of the resistor R34 is electrically connected with the other end of the capacitor C25.

The Touch circuit 12 includes a resistor R7 (with a resistance value of 1M Ω), a resistor R8 (with a resistance value of 1M Ω), a resistor R9 (with a resistance value of 1M Ω), a resistor R10 (with a resistance value of 1M Ω), a resistor R11 (with a resistance value of 1M Ω), a resistor R12 (with a resistance value of 1M Ω), a resistor R13 (with a resistance value of 10k Ω), a resistor R14 (with a resistance value of 10k Ω), a resistor R15 (with a resistance value of 10k Ω), a resistor R16, a resistor R17, a resistor R18, a Touch button Touch1, a Touch button Touch2, a Touch button Touch4, and a Touch button 6, and please refer to fig. 8 for a specific connection relationship among the components; the common end of the charge and discharge resistor R7, the resistor R8, the resistor R9, the resistor R10, the resistor R11 and the resistor R12 is connected with the thirty-third pin of the chip U5 in the main control circuit, and an RC acquisition circuit is formed by the filter resistor R13, the resistor R14, the resistor R15, the resistor R16, the resistor R17, the resistor R18, the Touch key Touch1, the Touch key Touch2, the Touch key Touch3, the Touch key Touch4, the Touch key Touch5 and the Touch key Touch6, and the RC acquisition principle is based on measuring the charge/discharge time of the Touch key electrode capacitor through the charge and discharge gas resistor. When the touch key is touched, the electrode capacitance is increased, and the charging/discharging time is prolonged, so that whether a finger approaches or not can be detected by using the change.

The indicator light control circuit 13 includes a resistor R20 (with a resistance value of 1k Ω), a resistor R21 (with a resistance value of 1k Ω), a resistor R22 (with a resistance value of 1k Ω), a resistor R23 (with a resistance value of 750 Ω), a resistor R24 (with a resistance value of 750 Ω), a resistor R25 (with a resistance value of 750 Ω), a resistor R26 (with a resistance value of 750 Ω), a resistor R27 (with a resistance value of 1k Ω), a resistor R28 (with a resistance value of 1k Ω), a resistor R29 (with a resistance value of 750 Ω), a resistor R30 (with a resistance value of 750 Ω), a resistor R31 (with a resistance value of 1k Ω), and a light emitting diode LED1 (with a model number of FC-DA1608BK-470H10) to a light emitting diode LED24 (with a model number of RF-WUB190DS-DD-E2), and specific connection relationships among the components refer to fig. 9; the brightness of the light emitting diodes LED1 to LED24 can be set by adjusting the resistance values of a current limiting resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30 and a resistor R31, and PINs PIN 9, PIN10, PIN11, PIN12, PIN15, PIN16, PIN20, PIN23, PIN24, PIN25, PIN35, PIN36, PIN40, PIN41 and PIN48 of a chip U5 in the main control circuit are used for providing power for the light emitting diodes, and meanwhile, the on-off state of the light emitting diodes is controlled.

The buzzer control circuit 15 includes a resistor R39 (with a resistance value of 470 Ω), a resistor R60 (with a resistance value of 51 Ω), a resistor R70 (with a resistance value of 150 Ω), a resistor R71 (with a resistance value of 150 Ω), a diode D5 (with a model number of IN4148), and a buzzer B1 (with a model number of MLT-7525), and the specific connection relationship among the components is as shown IN fig. 10; the 4.5V power is connected to resistance R71's one end, and the other end is connected with buzzer B1's positive pole pin, provides operating voltage for buzzer B1 work, and the one end of resistance R60 is connected with buzzer B1's negative pole, and the other end is connected with triode Q2's collecting electrode, plays the current-limiting effect, and the regulation resistance can set up the buzzer volume. The base electrode of the triode Q2 is connected with the resistor R39 and the resistor R70, the emitter electrode of the triode Q2 is grounded, the forty-fifth pin of the chip U5 controls the on and off of the triode Q2 through outputting high and low levels to control the buzzer B1, the diode D5 plays a role in voltage clamping, and the resistor R70 is a pull-down resistor.

The vibrator control circuit 16 includes a resistor R33 (with a resistance value of 150 Ω), a resistor R38 (with a resistance value of 150 Ω), a resistor R66 (with a resistance value of 150 Ω), a diode D13 (with a model number of IN4148), a triode Q1 (with a model number of SS8050), and a vibrator M1 (with a model number of LCM0820a2915F), and the specific connection relationship among the components is shown IN fig. 11; one end of the resistor R66 is connected with a 4.5V power supply, the other end of the resistor R66 is connected with an anode pin of the vibrator M1 to provide working voltage for the work of the vibrator M1, the other end of the vibrator M1 is connected with a collector of the triode Q1, the resistor R66 has a current limiting function, and the vibration intensity can be set by adjusting the resistance value. The base electrode of the triode Q1 is respectively connected with the resistor R33 and the resistor R38, the emitter electrode of the triode Q1 is grounded, the forty-third pin of the chip U5 controls the on and off of the triode Q1 through outputting high and low levels to control the vibrator M1, the diode D13 plays a role in voltage clamping, and the resistor R38 is a pull-down resistor.

The main control circuit 10 includes a resistor R78, a capacitor C10 (capacitance value is 1uF), a capacitor C11 (capacitance value is 1uF), a capacitor C24 (capacitance value is 1uF), and a chip U5 (model number is LQFP48), and the specific connection relationship between the components is as shown in fig. 12; a seventh pin of the chip U5 is a VDD pin, the working voltage is 3.3V, and the alternating current ripple is filtered by a filter capacitor C10, a capacitor C11 and a capacitor C24; the resistors R78 and R77 are pull-down resistors; the forty-seventh pin and the forty-sixth pin of the chip U5 are connected to the pin TX and the pin RX of the bluetooth module CON1, and the chip U5 and the bluetooth module CON1 are programmed with firmware for UART communication therebetween.

The AC-DC power supply circuit 1 comprises a resistor R1 (with a resistance value of 390K omega), a resistor R2 (with a resistance value of 10K omega), a resistor R3 (with a resistance value of 39K omega), a resistor R4 (with a resistance value of 10K omega), a resistor R6 (with a resistance value of 10K omega), a resistor R61 (with a resistance value of 510K omega), a resistor R67, a capacitor C1 (with a capacitance value of 1nF), a capacitor C6 (with a capacitance value of 1 muF), a capacitor C2 (with a capacitance value of 100nF), a capacitor C3 (with a capacitance value of 100nF), a capacitor C4 (with a capacitance value of 22 muF), a capacitor CY1 (with a capacitance value of HJE MA 102MA4DW-F6001), an electrolytic capacitor CE1 (with a capacitance value of 220 muF), an electrolytic capacitor 2 (with a capacitance value of 2.2 muF), an electrolytic capacitor CE3 (with a capacitance value of 2.2 muF), an electrolytic 4 (with a capacitance value of 220 muF), an inductor L5 (with a capacitance value of 106 muF), an inductor L3 mA-120 mA-051A-472-24 mA L A), and an electrolytic capacitor LGA-472, A diode D1 (model SMA), a diode D2 (model ES1JFL SOD-123FL), a diode D3 (model SMA), a diode D4 (model F7A), a diode D12 (model ES1JFL SOD-123FL), a chip U1 (model AZ1117CH-3.3TRG1), a chip U2 (model LNK603SO-8C), and a flyback transformer TR1 (model EE13), and the specific connection relationship among the components is shown in fig. 13; alternating current mains supply is rectified by a diode D4, and is filtered by a pi-type filter circuit consisting of an electrolytic capacitor CE2, an inductor L2 and an electrolytic capacitor CE3, 50Hz alternating current voltage is converted into direct current voltage, peak voltage and induction voltage are generated on a primary winding N1 when an MOS (metal oxide semiconductor) tube in a chip U2 is switched on and switched off, and an RCD (resistor-capacitor) absorption clamping protection circuit consisting of a resistor R1, a capacitor C1 and a diode D3 prevents the chip U2 from being damaged. The auxiliary winding N2, the resistor R3 and the resistor R6 form a voltage feedback circuit, and the output voltage of the secondary winding N5 of the flyback transformer TR1 is adjusted. An output rectifying circuit is formed by a secondary winding N5 of the flyback transformer TR1, a diode D1, an electrolytic capacitor CE1, a capacitor C2 and a resistor R61, and 4.5V direct-current voltage is output. The chip U1 is a low dropout regulator, converts 4.5V DC voltage into 3.3V DC voltage, and the capacitor C3 and the capacitor C4 play a role in filtering.

To sum up, the utility model provides an intelligent household dimming control circuit, first dimming control circuit and second dimming control circuit are two way isolated control circuit, are used for the dimming and the on-off control of first load and second load respectively, and first dimming control circuit is controlled by first dimming drive circuit, and first dimming drive circuit provides driving voltage, and main control circuit provides PWM control signal; the second dimming control circuit is controlled by a second dimming driving circuit, the second dimming driving circuit provides driving voltage, and the main control circuit provides a PWM control signal; the first zero point detection circuit and the second zero point detection circuit provide commercial power zero-crossing data for the main control circuit, so that the main control circuit outputs accurate PWM control signals, and a soft light control effect is achieved; a wireless transmission module is arranged to realize wireless intelligent control; setting a touch circuit to realize manual touch control; an indicator lamp control circuit, a buzzer control circuit and a vibrator control circuit are arranged to realize control state indication and feedback; the dimming control circuit designed by the scheme can realize independent control of two paths of lamplight.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The intelligent household dimming control circuit is characterized by comprising an AC-to-DC conversion circuit, a first dimming control circuit, a second dimming control circuit, a first dimming drive circuit, a second dimming drive circuit, a first zero detection circuit, a second zero detection circuit, a first load, a second load, a main control circuit, a wireless transmission circuit, a touch control circuit, an indicator lamp control circuit, an induction control circuit, a buzzer control circuit and a vibrator control circuit, wherein the main control circuit is respectively electrically connected with the AC-to-DC conversion circuit, the first dimming drive circuit, the second dimming drive circuit, the first zero detection circuit, the second zero detection circuit, the wireless transmission circuit, the touch control circuit, the indicator lamp control circuit, the induction control circuit, the buzzer control circuit and the oscillator control circuit, and the first dimming control circuit is respectively electrically connected with the AC-to-DC conversion circuit, The dimming control circuit comprises a first dimming drive circuit, a first load, a first zero point detection circuit and a second dimming control circuit which are electrically connected, wherein the second dimming control circuit is respectively electrically connected with the second dimming drive circuit, the second zero point detection circuit and the second load, the first load is electrically connected with the second load, the first load is connected with a zero line of an alternating current power supply, and the first dimming control circuit is connected with a live line of the alternating current power supply.

2. The smart home dimming control circuit according to claim 1, wherein the first dimming control circuit comprises a resistor R40, a resistor R72, a resistor R73, a capacitor C17, a diode D8, a diode D9, a diode D14, a voltage regulator DZ4, a voltage regulator DZ5, a field effect transistor Q4 and a field effect transistor Q9, a source electrode of the field effect transistor Q9 is electrically connected with an anode of the diode D8 and one end of the resistor R40 respectively, the other end of the resistor R40 is electrically connected with one end of the capacitor C17, the other end of the capacitor C17 is electrically connected with a drain electrode of the field effect transistor Q4 and an anode of the diode D9 respectively, a cathode of the diode D9 is electrically connected with a cathode of the diode D8 and a cathode of the diode D14 respectively, a gate of the field effect transistor Q4 is electrically connected with one end of the resistor R73, a cathode of the voltage regulator DZ5, a cathode of the voltage regulator DZ4, a cathode of the resistor R72 and a gate of the field effect transistor Q9, the anode of the diode D14 is respectively and electrically connected with the anode of a voltage regulator tube DZ4, the anode of a voltage regulator tube DZ5, the other end of a resistor R73, the other end of a resistor R72, the drain of a field effect tube Q9 and the source of a field effect tube Q4.

3. The smart home dimming control circuit according to claim 1, wherein the second dimming control circuit comprises a resistor R43, a resistor R74, a resistor R75, a voltage dependent resistor RV3, a capacitor C19, a diode D10, a diode D11, a voltage dependent tube DZ2, a voltage dependent tube DZ3, a field effect tube Q5 and a field effect tube Q6, wherein a source of the field effect tube Q5 is electrically connected with an anode of the diode D10, one end of the resistor R10 and one end of the voltage dependent resistor RV 10 respectively, a drain of the field effect tube Q10 is electrically connected with one end of the resistor R10, an anode of the voltage dependent tube DZ 10 and a source of the field effect tube Q10 respectively, a cathode of the diode D10 is electrically connected with a cathode of the diode D10, a drain of the field effect tube Q10 is electrically connected with an anode of the diode D10, one end of the capacitor C10 and the other end of the resistor R10, the grid electrode of the field effect transistor Q6 is respectively and electrically connected with the other end of the resistor R75, the cathode of the voltage regulator tube DZ3, the cathode of the voltage regulator tube DZ2, the other end of the resistor R74 and the grid electrode of the field effect transistor Q5.

4. The intelligent household dimming control circuit according to claim 1, wherein the first dimming driving circuit comprises a resistor R41, a resistor R42, a resistor R62, a capacitor C29, a diode D6 and a phototransistor U6B, a collector of the phototransistor U6B is electrically connected to one end of the capacitor C29, an emitter of the phototransistor U6B is electrically connected to one end of a resistor R42, one end of the resistor R62 and a cathode of the diode D6, the other end of the resistor R62 is electrically connected to the other end of the capacitor C29, the other end of the resistor R62 and the other end of the capacitor C29 are both grounded, an anode of the diode D6 is electrically connected to one end of the resistor R41, and the other end of the resistor R41 is electrically connected to the other end of the resistor R42.

5. The smart home dimming control circuit according to claim 4, wherein the first dimming driving circuit further comprises a resistor R51, a resistor R52, a resistor R53, a capacitor C20, a capacitor C21, a light emitting diode U6A and a field effect transistor Q8, a drain of the field effect transistor Q8 is grounded, a gate of the field effect transistor Q8 is electrically connected with one end of a resistor R53, the other end of the resistor R53 is grounded, a source of the field effect transistor Q8 and an anode of the light emitting diode U6A are electrically connected with one end of a resistor R51, the other end of the resistor R51 is electrically connected with one end of a capacitor C20 and one end of a resistor R52 respectively, the other end of the resistor R52 is electrically connected with one end of a capacitor C21, the other end of the capacitor C21 is electrically connected with the other end of a capacitor C20, and the other end of the capacitor C21 and the other end of the capacitor C20 are both grounded.

6. The intelligent household dimming control circuit according to claim 1, wherein the second dimming driving circuit comprises a resistor R44, a resistor R45, a resistor R65, a capacitor C30 and a phototransistor U7B, a collector of the phototransistor U7B is electrically connected to one end of the capacitor C30, an emitter of the phototransistor U7B is electrically connected to one end of the resistor R65, one end of the resistor R45 and a cathode of the diode D7, an anode of the diode D7 is electrically connected to one end of the resistor R44, the other end of the resistor R44 is electrically connected to the other end of the resistor R45, the other end of the resistor R65 is electrically connected to the other end of the capacitor C30, and the other end of the resistor R65 and the other end of the capacitor C30 are both grounded.

7. The smart home dimming control circuit of claim 6, wherein the second dimming driving circuit further comprises a resistor R47, a resistor R48, a resistor R49, a capacitor C13, a capacitor C18, a light emitting diode U7A and a field effect transistor Q3, the grid of the field effect transistor Q3 is electrically connected with one end of a resistor R49, the other end of the resistor R49 is grounded, the drain electrode of the field effect transistor Q3 is grounded, the source electrode of the field effect transistor Q3 is electrically connected with the cathode electrode of the light emitting diode U7A, the anode of the light emitting diode U7A is electrically connected with one end of a resistor R48, the other end of the resistor R48 is electrically connected with one end of a resistor R47 and one end of a capacitor C18 respectively, the other end of the resistor R47 is electrically connected with one end of a capacitor C13, the other end of the capacitor C13 is electrically connected with the other end of the capacitor C18, and the other end of the capacitor C13 and the other end of the capacitor C18 are both grounded.

8. The intelligent household dimming control circuit according to claim 1, wherein the first zero point detection circuit comprises a resistor R54, a resistor R55, a resistor R56, a capacitor C22, a voltage regulator DZ1 and a photo coupler OC1, a first end of the photo coupler OC1 is electrically connected with one end of the resistor R55, the other end of the resistor R55 is electrically connected with one end of the resistor R54, the other end of the resistor R54 is electrically connected with an anode of the voltage regulator DZ1, a third end of the photo coupler OC1 is electrically connected with one end of the resistor R56 and one end of the capacitor C22 respectively, the other end of the resistor R56 is connected with a power supply, a fourth end of the photo coupler OC1 is electrically connected with the other end of the capacitor C22, and the fourth end of the photo coupler OC1 and the other end of the capacitor C22 are both grounded.

9. The intelligent household dimming control circuit according to claim 1, wherein the second zero point detection circuit comprises a resistor R57, a resistor R58, a resistor R59, a capacitor C23, a voltage regulator tube DZ6 and a photocoupler OC2, a first end of the photocoupler OC2 is electrically connected with one end of the resistor R58, the other end of the resistor R58 is electrically connected with one end of the resistor R57, the other end of the resistor R57 is electrically connected with an anode of the voltage regulator tube DZ6, a second end of the photocoupler OC2 is grounded, a third end of the photocoupler OC2 is electrically connected with one end of the resistor R59 and one end of the capacitor C23 respectively, the other end of the resistor R59 is connected with a power supply, a fourth end of the photocoupler OC2 is electrically connected with the other end of the capacitor C23, and a fourth end of the photocoupler OC2 and the other end of the capacitor C23 are both grounded.

10. The smart home dimming control circuit according to claim 1, wherein the sensing control circuit comprises a resistor R32, a resistor R34, a resistor R76, a capacitor C15, a capacitor C16, a capacitor C25, a capacitor C27, a capacitor C28 and a chip U3, a first pin of the chip U3 is electrically connected with one end of the resistor R32, a second pin of the chip U3 is respectively and electrically connected with one end of the capacitor C15, one end of the capacitor C27, one end of the capacitor C16 and one end of the capacitor C28, a second pin of the chip U3, one end of the capacitor C15, one end of the capacitor C27, one end of the capacitor C25, one end of the capacitor C16 and one end of the capacitor C28 are all grounded, a fourth pin of the chip U3 is respectively and electrically connected with the other ends of the capacitor C15 and the capacitor C27, a fifth pin of the chip U3 is respectively and electrically connected with the other end of the capacitor C16, one end of the capacitor R76 and the other end of the capacitor C28, the sixth pin of the chip U3 is electrically connected to one end of a resistor R34, and the other end of the resistor R34 is electrically connected to the other end of a capacitor C25.