CN109922585B - Light control circuit - Google Patents
Light control circuit Download PDFInfo
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- CN109922585B CN109922585B CN201910283823.2A CN201910283823A CN109922585B CN 109922585 B CN109922585 B CN 109922585B CN 201910283823 A CN201910283823 A CN 201910283823A CN 109922585 B CN109922585 B CN 109922585B
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Abstract
The invention relates to a light control circuit, which comprises an overvoltage protection circuit, a rectifying circuit, a voltage reduction circuit, a signal transceiving control circuit and a wireless communication power supply circuit for supplying power to the signal transceiving control circuit, wherein the voltage reduction circuit is connected with a light source, the signal transceiving control circuit can receive signals through a wireless network and change the input voltage of the light source by controlling the voltage reduction circuit so as to change the brightness and the color of the light source, so that the lighting requirements of different users can be met, and the wireless network sends instructions to the light source, so that the cost of light source circuit arrangement is saved, the use of electric wires is reduced, and a house is more attractive.
Description
Technical Field
The invention relates to the field of light control, in particular to a light control circuit.
Background
With the continuous improvement of living standard, people have higher and higher requirements on electronic equipment, for example, when using a lamp, the lamp is expected to have beautiful appearance design, and the lamp is also expected to have different brightness or color according to different scenes automatically, for example, when the room is dark, the lamp needs to be bright or the lamp needs to be white, and when the room is bright, the lamp needs to be dim or the lamp needs to be yellow, so that some lighting equipment with single brightness needs to be improved, the brightness and the lamp color can be changed freely, and the lighting requirements of different users are met.
Disclosure of Invention
In view of the above-mentioned current situation of the prior art, the present invention provides a light control circuit to solve the problems of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a light control circuit comprises an overvoltage protection circuit, a rectifying circuit, a voltage reduction circuit, a signal transceiving control circuit and a wireless communication power supply circuit for supplying power to the signal transceiving control circuit; wherein,
the input end of the overvoltage protection circuit is connected with a power supply, and the output end of the overvoltage protection circuit is electrically connected with the input end of the rectification circuit;
the output end of the rectification circuit is electrically connected with the input end of the wireless communication power supply circuit and the input end of the voltage reduction circuit in sequence;
the output end of the wireless communication power supply circuit is electrically connected with the input end of the signal transceiving control circuit;
the voltage reduction circuit comprises an MOS tube Q1, an optical coupler G1, a transformer T1A and a voltage reduction chip for controlling the input voltage of the transformer T1A, one end of the optical coupler G1 is electrically connected with a PWM pin of the voltage reduction chip, the transformer T1A comprises a primary winding and a secondary winding, the secondary winding is connected with a light source, a D pole of the MOS tube Q1 is electrically connected with one end of the primary winding, a G pole of the MOS tube Q1 is electrically connected with a GATE pin of the voltage reduction chip, an S pole of the MOS tube Q1 is electrically connected with a CS pin of the voltage reduction chip, the voltage reduction chip can be matched with the MOS tube Q1, and the input voltage of the transformer T1A is accurately controlled through the MOS tube;
the signal receiving and sending control circuit comprises a 2.4G signal receiving and sending module and a single chip microcomputer, wherein the 2.4G signal receiving and sending module is used for receiving and sending wireless signals, the 2.4G signal receiving and sending module is electrically connected with the single chip microcomputer, the single chip microcomputer is connected with the other end of an optical coupler G1, the 2.4G signal receiving and sending module can be connected with an indoor optical sensor through a wireless network, the 2.4G signal receiving and sending module can also be connected with a mobile phone of a user through the wireless network, the voltage reduction chip does not have the functions of receiving and sending and converting the wireless signals, the single chip microcomputer needs to receive and convert the wireless signals through the single chip microcomputer, the single chip microcomputer converts the wireless signals into electric signals after passing through the optical coupler G1 and sends the electric signals to the voltage reduction chip, and the voltage on the voltage reduction circuit can be changed, and the light and shade of light can be changed.
Preferably, the single chip microcomputer is further connected with one end of an optical coupler G3, the other end of the optical coupler G3 is electrically connected with a G pole of an MOS transistor Q2, a D pole of the MOS transistor Q2 is connected with a PWM pin of the voltage reduction chip, an S pole of the MOS transistor Q2 is grounded, and the single chip microcomputer can instruct the voltage reduction chip to change the color of light through the optical coupler G3.
Preferably, the step-down circuit further comprises a primary power supply circuit and a secondary power supply circuit, the primary power supply circuit and the secondary power supply circuit are respectively electrically connected with the step-down chip, the primary power supply circuit comprises a transformer T1B, a resistor R11 connected in series with the transformer T1B, a diode D4 connected in series with the transformer T1B, a capacitor C6 connected in parallel with the transformer T1B, and a capacitor C7 connected in parallel with the transformer T1B, the transformer T1B is connected with a secondary winding of the transformer T1A, the secondary power supply circuit comprises a resistor R3, a resistor R5, and a resistor R9 connected in series in sequence, one end of the resistor R3 is electrically connected with the rectifying circuit, one end of the resistor R9 is electrically connected with the step-down chip, when the primary power supply circuit is not powered, the secondary power supply circuit can initially power the step-down chip, when the primary power supply circuit is powered, the secondary power supply circuit can assist the main power supply power to the step-down chip, and the secondary power supply circuit is matched with the secondary power supply circuit, the stable operation of the voltage reduction chip is ensured.
Preferably, the wireless communication power supply circuit comprises a transformer T2, a power management chip U4, an optocoupler G2 and a voltage reduction chip U6, the transformer T2 comprises a first primary winding, a second primary winding and a first secondary winding, one end of the first primary winding is electrically connected to the rectifying circuit, the other end of the first primary winding is electrically connected to the power management chip U4, the second primary winding is electrically connected to the power management chip U4, an output end of the optocoupler G2 is electrically connected to the power management chip U4, an input end of the optocoupler G2 is electrically connected to the first secondary winding, an input end of the voltage reduction chip U6 is electrically connected to the first primary winding, an output end of the voltage reduction chip U6 is electrically connected to the single chip, the power management chip U4 can change the magnitude of the input voltage of the transformer T2, so as to ensure the voltage stability of the wireless communication power supply circuit and provide the single chip with a stable voltage, avoid the singlechip to burn out because of input voltage is too big.
Preferably, the overvoltage protection circuit comprises a fuse F1, and a voltage sensitive resistor R2 and a capacitor C1 which are sequentially connected in parallel with the fuse F1, wherein the fuse F1 can ensure that the input current does not exceed a specified value, and the voltage sensitive resistor R2 can ensure that the input voltage does not exceed a specified value.
Preferably, the rectifying circuit comprises a coil L1, a capacitor C2 and a bridge stack D1 which are sequentially connected with the coil L1 in parallel, and the bridge stack D1 can convert alternating current into direct current.
Preferably, a voltage feedback circuit is further arranged between the voltage reduction chip and the MOS transistor Q1, the voltage feedback circuit includes a resistor R19, a resistor R18, a resistor R17 and a resistor R15, the resistor R19 is connected in parallel with the resistor R18 and the resistor R17, the resistor R15 is connected in series with the resistor R17, the voltage feedback circuit can know the magnitude of the input voltage of the light source at any time, and the voltage reduction chip can more accurately control the magnitude of the input voltage of the light source by arranging the voltage feedback circuit.
Preferably, the single chip microcomputer is further connected with an external control circuit for controlling other electrical appliances, the external control circuit comprises a relay, an MOS transistor Q3 and a diode D10, a G pole of the MOS transistor Q3 is electrically connected with the single chip microcomputer, an S pole of the MOS transistor Q3 is grounded, a D pole of the MOS transistor Q3 is electrically connected with the relay, the diode D10 is connected with the relay in parallel, the other electrical appliances can be electrical appliances such as a humidifier and an air conditioner, and the relay can be connected with other electrical appliances so as to control the other electrical appliances to be turned on or turned off.
Compared with the prior art, the invention has the advantages that:
the wireless network illumination control system can directly send instructions to the light source through the wireless network, saves the cost of light source circuit arrangement, reduces the use of electric wires, enables a house to be more attractive, can accurately control the brightness of the light source through the wireless network, can accurately change the color of the light source through the wireless network, can meet the illumination requirements of different users, is reasonable in design, meets the market requirements, and is suitable for popularization.
Drawings
FIG. 1 is a schematic diagram of the circuit of the present invention;
fig. 2 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, the wireless communication power supply circuit comprises an overvoltage protection circuit, a rectifying circuit, a voltage reduction circuit, a signal transceiving control circuit and a wireless communication power supply circuit for supplying power to the signal transceiving control circuit; the input end of the overvoltage protection circuit is connected with the power supply, and the output end of the overvoltage protection circuit is electrically connected with the input end of the rectification circuit; the output end of the rectifying circuit is electrically connected with the input end of the wireless communication power supply circuit and the input end of the voltage reduction circuit in sequence; the output end of the wireless communication power supply circuit is electrically connected with the input end of the signal transceiving control circuit; the voltage reduction circuit comprises an MOS tube Q1, an optocoupler G1, a transformer T1A and a voltage reduction chip for controlling the input voltage of the transformer T1A, one end of the optocoupler G1 is electrically connected with a PWM pin of the voltage reduction chip, the transformer T1A comprises a primary winding and a secondary winding, the secondary winding is connected with a light source, a D pole of the MOS tube Q1 is electrically connected with one end of the primary winding, a G pole of the MOS tube Q1 is electrically connected with a GATE pin of the voltage reduction chip, and an S pole of the MOS tube Q1 is electrically connected with a CS pin of the voltage reduction chip; the signal receiving and transmitting control circuit comprises a 2.4G signal receiving and transmitting module used for receiving and transmitting wireless signals and a single chip microcomputer, the 2.4G signal receiving and transmitting module is electrically connected with the single chip microcomputer, and the single chip microcomputer is connected with the other end of the optocoupler G1.
When the wireless communication power supply circuit is operated, the overvoltage protection circuit is connected with an external power supply, current sequentially flows through a fuse F1, a voltage sensitive resistor R2 and a capacitor C1, then alternating current can be converted into direct current through a coil L1, the capacitor C2 and a bridge stack D1 to be used by a light source, the current is rectified by a rectifying circuit and then sequentially flows to a wireless communication power supply circuit and a voltage reduction circuit, after the wireless communication power supply circuit is powered on, firstly, a power management chip U4 is powered on to start operation, the power management chip U4 can control the voltage of an input transformer T2 by using a PWM control technology, an optical coupler G2 can constantly feed back the specific magnitude of the output voltage of a transformer T2 to the power management chip U4, so that the power management chip U4 can be conveniently and accurately controlled, after the current output by the transformer T2 flows into a voltage reduction chip U6, the voltage reduction chip U6 reduces the magnitude of the input voltage by changing the magnitude of the internal resistor, and enables the output voltage to meet the working voltage standard of the single chip, the singlechip starts to work after being electrified, a 2.4G module connected with the singlechip is electrified, a secondary power supply circuit is electrified simultaneously, the voltage reduction chip starts to work, a 2.4G signal transceiver module is matched with an indoor optical sensor or a user mobile phone in a broadcasting mode, the optical sensor can collect indoor brightness and sends signals to the 2.4G signal transceiver module through a wireless network, the 2.4G signal transceiver module receives the signals and sends the signals to the singlechip for judgment, the singlechip can control the voltage reduction chip to control the voltage of an input transformer T1A point through a PWM control technology by an optical coupler G1, thereby changing the output voltage of the transformer T1A and further changing the brightness of a light source, particularly, the singlechip can change the input current of the optical coupler G1 to send and change the output current of the optical coupler G1, and the voltage reduction chip can be connected with or disconnected with a G pole of an MOS tube Q1 after receiving the electric signals output by the optical coupler G1, when the voltage reduction chip is communicated with the MOS tube Q1, the D pole and the S pole of the MOS tube are communicated, and the transformer T1A is electrified; when the voltage reduction chip is disconnected with the MOS tube Q1, the D pole and the S pole of the MOS tube are disconnected, and the T1A is not electrified, and similarly, the singlechip can control the voltage reduction chip to change the color of light of the light source through the optocoupler G3; after the transformer T1A is powered on, the transformer T1B is powered on, the main power supply circuit is powered on, and the secondary power supply circuit can assist the main power supply circuit to supply power to the voltage reduction chip; the voltage feedback circuit is electrified when the D pole and the S pole of the MOS tube are communicated, the voltage feedback circuit can constantly know the magnitude of the input voltage of the light source, and the voltage feedback circuit is arranged, so that the voltage reduction chip can more accurately control the magnitude of the voltage input to the light source.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A light control circuit is characterized by comprising an overvoltage protection circuit, a rectifying circuit, a voltage reduction circuit, a signal transceiving control circuit and a wireless communication power supply circuit for supplying power to the signal transceiving control circuit; wherein,
the input end of the overvoltage protection circuit is connected with a power supply, and the output end of the overvoltage protection circuit is electrically connected with the input end of the rectification circuit;
the output end of the rectification circuit is electrically connected with the input end of the wireless communication power supply circuit and the input end of the voltage reduction circuit in sequence;
the output end of the wireless communication power supply circuit is electrically connected with the input end of the signal transceiving control circuit;
the voltage reduction circuit comprises an MOS tube Q1, an optocoupler G1, a transformer T1A and a voltage reduction chip for controlling the input voltage of the transformer T1A, wherein one end of the optocoupler G1 is electrically connected with a PWM pin of the voltage reduction chip, the transformer T1A comprises a primary winding and a secondary winding, the secondary winding is connected with a light source, a D pole of the MOS tube Q1 is electrically connected with one end of the primary winding, a G pole of the MOS tube Q1 is electrically connected with a GATE pin of the voltage reduction chip, and an S pole of the MOS tube Q1 is electrically connected with a CS pin of the voltage reduction chip;
the signal receiving and transmitting control circuit comprises a 2.4G signal receiving and transmitting module for receiving and transmitting wireless signals and a single chip microcomputer, wherein the 2.4G signal receiving and transmitting module is electrically connected with the single chip microcomputer, and the single chip microcomputer is connected with the other end of the optocoupler G1; the single chip microcomputer is also connected with one end of an optical coupler G3, the other end of the optical coupler G3 is electrically connected with a G electrode of an MOS tube Q2, a D electrode of the MOS tube Q2 is connected with a PWM pin of the voltage reduction chip, and an S electrode of the MOS tube Q2 is grounded; the voltage reduction circuit further comprises a main power supply circuit and a secondary power supply circuit, wherein the main power supply circuit and the secondary power supply circuit are respectively electrically connected with the voltage reduction chip, the main power supply circuit comprises a transformer T1B, a resistor R11 connected with the transformer T1B in series, a diode D4 connected with the transformer T1B in series, a capacitor C6 connected with the transformer T1B in parallel, and a capacitor C7 connected with the transformer T1B in parallel, the transformer T1B is connected with a secondary winding of the transformer T1A, the secondary power supply circuit comprises a resistor R3, a resistor R5 and a resistor R9 which are sequentially connected in series, one end of the resistor R3 is electrically connected with the rectifying circuit, and one end of the resistor R9 is electrically connected with the voltage reduction chip; the wireless communication power supply circuit comprises a transformer T2, a power management chip U4, an optical coupler G2 and a voltage reduction chip U6, wherein the transformer T2 comprises a first primary winding, a second primary winding and a first secondary winding, one end of the first primary winding is electrically connected with a rectifying circuit, the other end of the first primary winding is electrically connected with the power management chip U4, the second primary winding is electrically connected with a power management chip U4, the output end of the optical coupler G2 is electrically connected with the power management chip U4, the input end of the optical coupler G2 is electrically connected with the first secondary winding, the input end of the voltage reduction chip U6 is electrically connected with the first primary winding, the output end of the voltage reduction chip U6 is electrically connected with a single chip microcomputer, the overvoltage protection circuit comprises a fuse F1, a voltage sensitive resistor R2 and a capacitor C1 which are sequentially connected with the fuse F1 in parallel, the rectifying circuit comprises a coil L1, a capacitor C2 and a bridge pile D1 which are sequentially connected with the coil L1 in parallel, a voltage feedback circuit is further arranged between the voltage reduction chip and the MOS tube Q1 and comprises a resistor R19, a resistor R18, a resistor R17 and a resistor R15, the resistor R19 is connected with a resistor R18 and a resistor R17 in parallel, the resistor R15 is connected with a resistor R17 in series, the single chip microcomputer is further connected with an external control circuit used for controlling other electrical appliances, the external control circuit comprises a relay, an MOS tube Q3 and a diode D10, the G pole of the MOS tube Q3 is electrically connected with the single chip microcomputer, the S pole of the MOS tube Q3 is grounded, the D pole of the MOS tube Q3 is electrically connected with the relay, and the diode D10 is connected with the relay in parallel;
the 2.4G signal transceiver module is paired with an indoor optical sensor or a user mobile phone in a broadcasting mode, the optical sensor collects indoor brightness and darkness and transmits signals to the 2.4G signal transceiver module through a wireless network, the 2.4G signal transceiver module receives the signals and then sends the signals to the single chip microcomputer for judgment, the single chip microcomputer controls a voltage reduction chip through an optical coupler G1 and controls the voltage of an input transformer T1A point through a PWM control technology, so that the output voltage of the transformer T1A is changed, and the brightness and darkness of a light source are changed; specifically, the single chip microcomputer can change the input current of the optocoupler G1 to enable the output current of the optocoupler G1 to be changed, the voltage reduction chip can be connected with or disconnected from the G pole of the MOS tube Q1 after receiving an electric signal output by the optocoupler G1, when the voltage reduction chip is connected with the MOS tube Q1, the D pole of the MOS tube is connected with the S pole, and the transformer T1A is electrified; when the voltage reduction chip is disconnected with the MOS tube Q1, the D pole and the S pole of the MOS tube are disconnected, and the T1A is not electrified, and similarly, the singlechip can control the voltage reduction chip to change the color of light of the light source through the optocoupler G3; after the transformer T1A is powered on, the transformer T1B is powered on, the main power supply circuit is powered on, and the secondary power supply circuit can assist the main power supply circuit to supply power to the voltage reduction chip; the voltage feedback circuit is electrified when the D pole and the S pole of the MOS tube are communicated, the voltage feedback circuit can constantly know the magnitude of the input voltage of the light source, and the voltage feedback circuit is arranged, so that the voltage reduction chip can more accurately control the magnitude of the voltage input to the light source.
2. A light control circuit according to claim 1, characterized in that the single chip microcomputer is further connected with an external control circuit for controlling other electrical appliances, the external control circuit comprises a relay, a MOS tube Q3 and a diode D10, the G pole of the MOS tube Q3 is electrically connected with the single chip microcomputer, the S pole of the MOS tube Q3 is grounded, the D pole of the MOS tube Q3 is electrically connected with the relay, and the diode D10 is connected with the relay in parallel.
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| CN201910283823.2A CN109922585B (en) | 2019-04-10 | 2019-04-10 | Light control circuit |
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| CN201910283823.2A CN109922585B (en) | 2019-04-10 | 2019-04-10 | Light control circuit |
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| CN113110125B (en) * | 2021-03-15 | 2022-04-01 | 三门康创电子科技有限公司 | Fruit and vegetable machine control circuit, fruit and vegetable machine and fruit and vegetable machine control method |
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