Zero point control circuit for dimming of smart home switch

Abstract

The utility model discloses a zero point control circuit for intelligent household switch dimming, which relates to the technical field of household control circuits and comprises a dimming power supply, a first single-chip microcomputer and a second single-chip microcomputer. The fourth end of the second single-chip microcomputer KOUT4 is electrically connected with a resistor R15, a pin of the resistor R15 is electrically connected with a capacitor C14 and the positive input end of an operational amplifier U4A, the positive input end and the negative input end of the operational amplifier U4A are electrically connected with a resistor R16 and a resistor R13 respectively, a pin of the resistor R16 is electrically connected with a pin of the capacitor C14, and the output end of the operational amplifier U4A is electrically connected with the resistor R14. The pin of the resistor R14 is electrically connected with the pin of the resistor R13, and the pin of the resistor R14 is electrically connected with the capacitor C12. The beneficial effects are that reverse voltages of dimming power supplies of different brands are eliminated, the output of the dimming power supplies is absolutely in a zero state, and a light-emitting source with small power is prevented from being in a zero light-emitting state.

Description

Technical Field

[0001] The utility model relates to the technical field of home control circuits, and in particular to a zero-point control circuit for dimming a smart home switch. Background Art

[0002] Electronic intelligent switch is an emerging industry. The new electronic circuit dimmer switch is more intelligent than the traditional potentiometer mechanical dimmer switch. It is more and more popular with consumers, which makes the division of labor in the production and manufacturing of electronic circuit dimmer switch products more refined and professional. The production and manufacturing of electronic circuit dimming products is generally divided into three parts: lighting part, dimming power supply part, switch control part, etc. They are generally responsible for different professional manufacturers, but the control switch of the control core part and the dimming power supply part are sometimes not compatible with different manufacturers, which is mainly reflected in the fact that the zero point of dimming cannot achieve the situation where the light is completely off.

[0003] At present, in order to solve this problem, many smart switch manufacturers have formulated corporate standards or selected dimming power supply parts of specified brands and models as configurations, or when the customer needs to use the dimming power supply during the project, they will detect and modify the dimming control switch circuit accordingly for configuration. However, there are disadvantages such as low versatility, long development project cycle, and high cost. At the same time, it is very inconvenient for end consumers to maintain and repair. It is very time-consuming and labor-intensive to find such a specified standard or specified brand model dimming power supply, which undoubtedly increases various costs. Therefore, the electronic smart switch control part has developed a circuit that can solve the compatibility of dimming zero point and all brands and models of dimming power supplies, which is an urgent need of the market and terminal users.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related art, the purpose of the utility model is to propose a zero-point control circuit for smart home switch dimming to overcome the above-mentioned technical problems existing in the existing related technology.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A zero-point control circuit for dimming a smart home switch comprises: a dimming power supply, a first single-chip microcomputer and a second single-chip microcomputer, wherein;

[0008] The second single-chip computer KOUT4 ​​end is electrically connected to the resistor R15, and the resistor R15 pin is electrically connected to the capacitor C14 and the positive input end of the operational amplifier U4A respectively, and the positive input end and the negative input end of the operational amplifier U4A are electrically connected to the resistor R16 and the resistor R13 respectively, and the resistor R16 pin is electrically connected to the capacitor C14 pin, and the output end of the operational amplifier U4A is electrically connected to the resistor R14, and the resistor R14 pin is electrically connected to the resistor R13 pin, and the resistor R14 pin is electrically connected to the capacitor C12, and the capacitor C12 pin is electrically connected to the capacitor C13, and the capacitor C12 and the capacitor C13 pins are electrically connected to the adjustable resistor R100 respectively, and the adjustable resistor R100VO1 end is electrically connected to the dimming power supply, and the adjustable resistor R100VO1 end and the dimming power supply pin are electrically connected to the relay K3;

[0009] The first single-chip microcomputer KOUT3 terminal is electrically connected to the resistor R22, the resistor R22 pin is electrically connected to the switch tube V3, the switch tube V3 pin is electrically connected to the diode D7, and the diode D7 pin is electrically connected to the relay K3.

[0010] Furthermore, the pin of the capacitor C14 and the pin of the resistor R16 are grounded respectively.

[0011] Furthermore, the negative power supply terminal of the operational amplifier U4A is electrically connected to the capacitor C11, and the pin of the capacitor C11 is grounded.

[0012] Furthermore, the positive power supply pin of the operational amplifier U4A is grounded.

[0013] Furthermore, the dimming power supply output terminal and the relay K3 pin are connected to VEE respectively.

[0014] Furthermore, the relay K3 pin is connected to VDD.

[0015] Furthermore, the switch tube V3 pin is connected to VEE.

[0016] Beneficial effects of the utility model:

[0017] The utility model is divided into two forms of dimming control at non-zero point and dimming control at zero point through the control of the first single-chip microcomputer and the second single-chip microcomputer; wherein, when dimming is controlled at non-zero point, the KOUT3 end of the first single-chip microcomputer has no output, and the output signal of the KOUT4 ​​end of the second single-chip microcomputer is amplified by the operational amplifier U4A to control the output of the dimming power supply, so as to achieve the purpose of linear dimming, and when the dimming power supply generates a reverse voltage greater than the output of the operational amplifier U4A, the adjustable resistor R100 can play a regulating role, and the control of the dimming power supply can also achieve a slight dimming effect. wherein, when dimming is controlled at zero point, the KOUT4 ​​end of the second single-chip microcomputer has no output, the KOUT3 end of the first single-chip microcomputer outputs a high level, the switch tube V3 is turned on, the relay K3 works, and switches to the VEE end, so as to make the dimming power supply control electrode and VEE absolutely short-circuited, eliminate the reverse voltage of the dimming power supplies of different brands, make the output of the dimming power supply absolutely zero point state, and also avoid the light source with very low power being in zero light state.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a circuit diagram of a zero-point control circuit for a smart home switch dimming according to an embodiment of the utility model. Figure 1 ;

[0022] Figure 2 This is a circuit diagram of a zero-point control circuit for a smart home switch dimming according to an embodiment of the utility model. Figure 2 . DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] According to an embodiment of the utility model, a zero-point control circuit for smart home switch dimming is provided.

[0025] like Figure 1 As shown, a zero-point control circuit for dimming a smart home switch includes: a dimming power supply, a first single-chip microcomputer and a second single-chip microcomputer, wherein;

[0026] The second single-chip computer KOUT4 ​​end is electrically connected to the resistor R15, and the resistor R15 pin is electrically connected to the capacitor C14 and the positive input end of the operational amplifier U4A respectively, and the positive input end and the negative input end of the operational amplifier U4A are electrically connected to the resistor R16 and the resistor R13 respectively, and the resistor R16 pin is electrically connected to the capacitor C14 pin, and the output end of the operational amplifier U4A is electrically connected to the resistor R14, and the resistor R14 pin is electrically connected to the resistor R13 pin, and the resistor R14 pin is electrically connected to the capacitor C12, and the capacitor C12 pin is electrically connected to the capacitor C13, and the capacitor C12 and the capacitor C13 pins are electrically connected to the adjustable resistor R100 respectively, and the adjustable resistor R100VO1 end is electrically connected to the dimming power supply, and the adjustable resistor R100VO1 end and the dimming power supply pin are electrically connected to the relay K3;

[0027] The first single-chip microcomputer KOUT3 terminal is electrically connected to the resistor R22, the resistor R22 pin is electrically connected to the switch tube V3, the switch tube V3 pin is electrically connected to the diode D7, and the diode D7 pin is electrically connected to the relay K3.

[0028] In addition, the capacitor C14 pin and the resistor R16 pin are grounded respectively. The negative power supply terminal of the operational amplifier U4A is electrically connected to the capacitor C11, and the capacitor C11 pin is grounded. The positive power supply terminal pin of the operational amplifier U4A is grounded.

[0029] In addition, the dimming power supply output terminal and the relay K3 pin are connected to VEE respectively. The relay K3 pin is connected to VDD. The switch tube V3 pin is connected to VEE.

[0030] With the help of the above technical solution, since different types of dimming power supplies will generate reverse voltages, which will affect the output of the control circuit, this circuit is designed to eliminate it. The control by the first single-chip microcomputer and the second single-chip microcomputer is divided into two forms: dimming control at non-zero point and dimming control at zero point; among them, when dimming is controlled at non-zero point, the KOUT3 end of the first single-chip microcomputer has no output, and the output signal of the KOUT4 ​​end of the second single-chip microcomputer is amplified by the operational amplifier U4A to control the output of the dimming power supply, so as to achieve the purpose of linear dimming, and when the dimming power supply generates a reverse voltage greater than the output of the operational amplifier U4A, the adjustable resistor R100 can play a regulating role, and the control of the dimming power supply can also achieve a slight dimming effect. Among them, the dimming is controlled at zero o'clock, the second single-chip microcomputer KOUT4 ​​terminal has no output, the first single-chip microcomputer KOUT3 terminal outputs a high level, the switch tube V3 is turned on, the relay K3 works, and switches to the VEE terminal, causing the dimming power supply control electrode and VEE to be absolutely short-circuited, eliminating the reverse voltage of dimming power supplies of different brands, causing the dimming power supply output to be absolutely zero point state, and also avoiding the light source with very low power to be in zero light state.

[0031] In the application of this technical solution, when the first single-chip microcomputer and the second single-chip microcomputer receive the control reset instruction, they can forcibly reset the zero point of the dimming power supply to zero, realize the reset of the dimming power supply and the light output, and realize no light output when the reset is truly zeroed. In addition, a linear optimization circuit is used to avoid the mutual overcurrent or electric energy impact of the protection electronic control switch part and the dimming power supply part when the reset is zeroed, and realize the protection between compatibility.

[0032] Furthermore, in one embodiment, Figure 2 As shown, when the dimming is controlled at a non-zero point, the KOUT3 end of the first single-chip microcomputer has no output, and the output signal of the KOUT4 ​​end of the second single-chip microcomputer is amplified by the operational amplifier U4A to control the output of the dimming power supply, so as to achieve the purpose of linear dimming. When the dimming power supply generates a reverse voltage greater than the output of the operational amplifier U4A, the adjustable resistor R100 can play a regulating role, and the control of the dimming power supply can also achieve a slight dimming effect. When the dimming is controlled at zero point, the KOUT4 ​​end of the second single-chip microcomputer has no output, the KOUT3 end of the first single-chip microcomputer outputs a high level, the switch tube V3 is turned on, the relay K3 works, the normally closed end VO1 is disconnected, and switched to the VEE end, so that the dimming power supply control electrode and VEE are absolutely short-circuited, the reverse voltage of the dimming power supplies of different brands is eliminated, and the output of the dimming power supply is absolutely zero. It also avoids the light source with very low power being in a zero light state.

[0033] In summary, with the help of the above technical solution of the utility model, the following effects can be achieved: the control of the first single-chip microcomputer and the second single-chip microcomputer is divided into two forms: controlling dimming at non-zero point and controlling dimming at zero point; wherein, the first single-chip microcomputer KOUT3 terminal has no output, and the output signal of the second single-chip microcomputer KOUT4 ​​terminal is amplified by the operational amplifier U4A to control the output of the dimming power supply, so as to achieve the purpose of linear dimming, and when the dimming power supply generates a reverse voltage greater than the output of the operational amplifier U4A, the adjustable resistor R100 can play a regulating role, and the control of the dimming power supply can also achieve a slight dimming effect. wherein, when dimming is controlled at zero point, the second single-chip microcomputer KOUT4 ​​terminal has no output, the first single-chip microcomputer KOUT3 terminal outputs a high level, the switch tube V3 is turned on, the relay K3 works, and switches to the VEE terminal, so as to make the dimming power supply control electrode and VEE absolutely short-circuited, eliminate the reverse voltage of the dimming power supplies of different brands, make the dimming power supply output absolutely zero point state, and also avoid the light source with very low power being in zero light state.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A zero-point control circuit for smart home switch dimming. It is characterized in that include: A dimming power supply, a first single-chip microcomputer and a second single-chip microcomputer, wherein; The second single-chip computer KOUT4 ​​end is electrically connected to the resistor R15, and the resistor R15 pin is electrically connected to the capacitor C14 and the positive input end of the operational amplifier U4A respectively, and the positive input end and the negative input end of the operational amplifier U4A are electrically connected to the resistor R16 and the resistor R13 respectively, and the resistor R16 pin is electrically connected to the capacitor C14 pin, and the output end of the operational amplifier U4A is electrically connected to the resistor R14, and the resistor R14 pin is electrically connected to the resistor R13 pin, and the resistor R14 pin is electrically connected to the capacitor C12, and the capacitor C12 pin is electrically connected to the capacitor C13, and the capacitor C12 and the capacitor C13 pins are electrically connected to the adjustable resistor R100 respectively, and the adjustable resistor R100VO1 end is electrically connected to the dimming power supply, and the adjustable resistor R100VO1 end and the dimming power supply pin are electrically connected to the relay K3; The first single-chip microcomputer KOUT3 terminal is electrically connected to the resistor R22, the resistor R22 pin is electrically connected to the switch tube V3, the switch tube V3 pin is electrically connected to the diode D7, and the diode D7 pin is electrically connected to the relay K3.

2. A zero-point control circuit for smart home switch dimming according to claim 1, It is characterized in that The capacitor C14 pin and the resistor R16 pin are grounded respectively.

3. A zero-point control circuit for smart home switch dimming according to claim 1, It is characterized in that The negative power supply terminal of the operational amplifier U4A is electrically connected to the capacitor C11, and a pin of the capacitor C11 is grounded.

4. A zero-point control circuit for smart home switch dimming according to claim 3, It is characterized in that The positive power supply pin of the operational amplifier U4A is grounded.

5. A zero-point control circuit for smart home switch dimming according to claim 1, It is characterized in that The dimming power supply output terminal and the relay K3 pin are connected to VEE respectively.

6. A zero-point control circuit for smart home switch dimming according to claim 5, It is characterized in that The relay K3 pin is connected to VDD.

7. A zero-point control circuit for smart home switch dimming according to claim 1, It is characterized in that The switch tube V3 pin is connected to VEE.

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