CN106793372B - Single live wire capacitive wall touch switch control circuit - Google Patents
Single live wire capacitive wall touch switch control circuit Download PDFInfo
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- CN106793372B CN106793372B CN201611034296.4A CN201611034296A CN106793372B CN 106793372 B CN106793372 B CN 106793372B CN 201611034296 A CN201611034296 A CN 201611034296A CN 106793372 B CN106793372 B CN 106793372B
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- 239000003990 capacitor Substances 0.000 claims description 40
- 230000035945 sensitivity Effects 0.000 claims description 18
- 238000004146 energy storage Methods 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims 1
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- 230000003068 static effect Effects 0.000 abstract description 9
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- 238000005299 abrasion Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to a wall touch switch control circuit, in particular to a single-live-wire capacitive wall touch switch control circuit. The single-live wire capacitive wall touch switch control circuit comprises a capacitive input circuit, a high-low level forming circuit, a direct-current controllable constant-voltage power supply circuit, an electronic switch and a trigger circuit; according to the invention, the capacitance input circuit and the high-low level forming circuit are matched to detect the input human body capacitance, and the high-low level forming circuit adopts a capacitance type special touch chip, so that the circuit is simple, the working is reliable, and the cost is greatly reduced; meanwhile, a direct current controllable constant voltage power supply circuit taking an insulated gate type MOS field effect transistor or a Darlington transistor as a core is adopted to provide a working power supply for the high-low level forming circuit, and the static current of the capacitive type special touch chip is extremely small, so that the static working current of the single-live wire capacitive type wall touch switch control circuit is reduced to below 20 mu A, and the occurrence of frequent flickering of the low-power energy-saving lamp is avoided.
Description
Technical Field
The invention relates to a wall touch switch control circuit, in particular to a single-live-wire capacitive wall touch switch control circuit.
Background
The touch switch has the advantages of simple and attractive appearance, no contact, no spark, no abrasion and long service life, and is deeply favored by users. However, the application of the conventional touch switch on the aspect of wall switch is still not extensive, most of the touch switches still adopt mechanical switches, and the advantages of technological innovation cannot be fully exerted, so that the following defects generally exist: 1. the circuit structure is complex, the price is high, the civilian can not be realized easily, and the wide popularization is not easy; 2. the influence of humidity is large, and the reliability is not high enough; 3. the lamp is easy to be started by an inductive fluorescent lamp or other electromagnetic interference, so that the controlled lamp light is flickering and even malfunction occurs; 4. the conventional touch switch control circuit generally comprises a power supply circuit and a trigger control circuit, wherein the power supply circuit provides working power for the trigger control circuit, and the power supply circuit and the trigger control circuit still have loss during static state, so that the static working current is difficult to reduce and is generally larger than 80 mu A, the circuit cannot be closed more thoroughly, a stroboscopic phenomenon can occur in a low-power energy-saving lamp, the low-power LED is not closed thoroughly, and the touch switch control circuit is difficult to adapt to the use in the low-power energy-saving lamp and the low-power LED circuit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the single live wire capacitive wall touch switch control circuit which is simple in structure, low in cost, reliable in operation and smaller in static working current.
In order to achieve the above purpose, the present invention provides a single live wire capacitive wall touch switch control circuit, which is characterized in that: the device comprises a capacitance input circuit, a high-low level forming circuit, a direct-current controllable constant-voltage power supply circuit, an electronic switch and a trigger circuit; the capacitive input circuit consists of a touch sheet and a trigger sensitivity adjusting capacitor, wherein one end of the trigger sensitivity adjusting capacitor is connected with the negative electrode of the power supply, and the other end of the trigger sensitivity adjusting capacitor is connected with the touch sheet and is used as the output end of the capacitive input circuit; the high-low level forming circuit is composed of a bistable circuit composed of single-channel touch sensing switch chips, the output end of the capacitance input circuit is connected with the input end of the high-low level forming circuit, and when the capacitance of the input end of the high-low level forming circuit is increased, the level of the output end of the high-low level forming circuit is turned over; the electronic switch and the trigger circuit comprise thyristors and a thyristor trigger circuit which form the electronic switch, and the thyristors are connected in series in an alternating current main circuit of the touch switch control circuit; the direct current controllable constant voltage power supply circuit comprises a rectifying circuit, an anti-backflow diode, an energy storage capacitor, a power switch tube and a direct current bias circuit, wherein the power switch tube is an insulated gate type MOS field effect tube or a Darlington tube, the direct current bias circuit comprises a first upper bias resistor and a lower bias voltage stabilizing diode, the first upper bias resistor is connected between a drain electrode and a grid electrode of the power switch tube in a bridging way to form an upper bias branch, a cathode of the lower bias voltage stabilizing diode is connected to the grid electrode of the power switch tube, an anode of the lower bias voltage stabilizing diode is connected to a reference level to control the output voltage of the direct current controllable constant voltage power supply circuit, the energy storage capacitor is connected to a source electrode of the power switch tube and a cathode of a direct current output side of the rectifying circuit, an output power supply of the source electrode of the power switch tube is stabilized by the voltage stabilizing integrated circuit to provide a working power supply for the capacitor input circuit and a high-low-level forming circuit, and the output of the high-low-level forming circuit controls the electronic switch and the trigger circuit; the anti-backflow diode is connected in series with the current input side of a constant voltage circuit formed by the power switching tube, the direct current bias circuit and the energy storage capacitor;
the rectifier circuit is a bridge rectifier circuit, an alternating current input side of the bridge rectifier circuit is used as a terminal to be connected in series in a mains supply live wire, the thyristor is a unidirectional thyristor, the thyristor is connected on the positive and negative ends of a direct current output side of the bridge rectifier circuit in a bridging mode, the thyristor trigger circuit is formed by connecting a current limiting resistor and a trigger threshold voltage stabilizing diode in series, and a serial branch of the current limiting resistor and the trigger threshold voltage stabilizing diode is connected between a source electrode of a power switch tube and a gate electrode of the thyristor; the anode of the lower bias zener diode is connected to the output end of the high-low level forming circuit.
According to the invention, the capacitance input circuit and the high-low level forming circuit are matched to detect the input human body capacitance, and the high-low level forming circuit adopts a capacitance type special touch chip, so that the circuit is simple, the working is reliable, and the cost is greatly reduced; meanwhile, a direct current controllable constant voltage power supply circuit taking an insulated gate type MOS field effect transistor or a Darlington transistor as a core is adopted to provide a working power supply for the high-low level forming circuit, and the static current of the capacitive type special touch chip is extremely small, so that the static working current of the single-live wire capacitive type wall touch switch control circuit is reduced to below 20 mu A, and the occurrence of frequent flickering of the low-power energy-saving lamp is avoided.
The invention will be further described with reference to the accompanying drawings and specific examples.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment 1 of the present invention;
FIG. 2 is a schematic circuit diagram of embodiment 2 of the present invention;
fig. 3 is a schematic circuit diagram of embodiment 3 of the present invention.
Detailed Description
The single-live-wire capacitive wall touch switch control circuit comprises a capacitive input circuit, a high-low level forming circuit, a direct-current controllable constant-voltage power supply circuit, an electronic switch and a trigger circuit; the capacitive input circuit consists of a touch sheet M and a trigger sensitivity adjusting capacitor C6, wherein one end of the trigger sensitivity adjusting capacitor C6 is connected with a power supply cathode, and the other end of the trigger sensitivity adjusting capacitor C6 is connected with the touch sheet M and is simultaneously used as an output end of the capacitive input circuit; the high-low level forming circuit is composed of a bistable circuit composed of a single-channel touch sensing switch chip U2, the output end of the capacitance input circuit is connected with the input end of the high-low level forming circuit, and when the capacitance of the input end of the high-low level forming circuit is increased, the output end of the high-low level forming circuit turns over, namely the high level is converted into the low level, and the low level is converted into the high level; the electronic switch and the trigger circuit comprise a thyristor VT1 and a thyristor trigger circuit which form the electronic switch, and the thyristor VT1 is connected in series in an alternating current main circuit of the touch switch control circuit; the direct current controllable constant voltage power supply circuit comprises a rectifying circuit, an anti-backflow diode VD1, an energy storage capacitor C2, a power switch tube V1 and a direct current bias circuit, wherein the power switch tube V1 is an insulated gate type MOS field effect tube or a Darlington tube, the direct current bias circuit comprises a first upper bias resistor R1 and a lower bias voltage stabilizing diode VD3, the first upper bias resistor R1 is connected between the drain electrode and the grid electrode of the power switch tube V1 in a bridging mode, the cathode of the lower bias voltage stabilizing diode VD3 is connected to the grid electrode of the power switch tube V1, the anode of the lower bias voltage stabilizing diode VD3 is connected to the source electrode of the power switch tube V1 and the cathode of the direct current output side of the rectifying circuit, the output power supply VCC1 of the source electrode of the power switch tube V1 is stabilized through the voltage stabilizing integrated circuit U1, the output direct current power supply 2 supplies working power for the capacitor input circuit and the high-low level forming circuit, and the output of the high-low level forming circuit controls the output voltage of the electronic switch VCC and the electronic trigger circuit. The anti-countercurrent diode VD1 is connected in series with the current input side of a constant voltage circuit composed of a power switch tube V1, a direct current bias circuit and an energy storage capacitor C2, two ends of the alternating current side of the rectifying circuit are the connection ends of the single-live wire capacitive wall touch switch control circuit, and the two ends are connected in series with the live wire of the mains supply through the connection ends, and the following is further described through a preferred embodiment:
specific example 1: as shown in fig. 1, the single-live-wire capacitive wall touch switch control circuit comprises a capacitive input circuit, a high-low level forming circuit, a direct-current controllable constant-voltage power supply circuit, an electronic switch and a trigger circuit; the capacitive input circuit comprises a touch sheet M and a trigger sensitivity adjusting capacitor C6, one end of the trigger sensitivity adjusting capacitor C6 is connected with the cathode of the power supply VCC1, the other end of the trigger sensitivity adjusting capacitor C6 is connected with the touch sheet M and is simultaneously used as the output end of the capacitive input circuit, the touch sheet M is made of a conductive metal sheet, proper touch sensitivity can be obtained by setting the proper sensitivity adjusting capacitor C6, false triggering is prevented, and the sensitivity adjusting capacitor C6 is preferably 30-47 pF. The high-low level forming circuit is composed of bistable circuits composed of special single-channel touch sensing switch chips U2, the single-channel touch sensing switch chips U2 are integrated chips such as RH6030 and TTP223, the output ends of the capacitance input circuits are connected with the input ends of the high-low level forming circuit, when the capacitance of the input ends of the high-low level forming circuit is increased, the level of the output ends of the high-low level forming circuit is turned over, namely, the level of the output ends of the single-channel touch sensing switch chips U2 is turned over once every time the circuit touches a touch sheet M.
The direct current controllable constant voltage power supply circuit comprises a rectifying circuit, an anti-backflow diode VD1, an energy storage capacitor C2, a power switch tube V1 and a direct current bias circuit, wherein the rectifying circuit is a bridge rectifying circuit UR, an alternating current input side of the bridge rectifying circuit UR is used as a wiring terminal to be connected in a mains supply live wire in series, the power switch tube V1 is an insulated gate type MOS field effect tube or a Darlington tube, the Darlington tube can meet the requirement of static current by setting a proper bias circuit in a static state, but the base current must be increased to meet the low-voltage working state in the conducting state, so that standby current is increased, and the temperature characteristic of the Darlington tube is far less than that of the insulated gate type MOS field effect tube. The direct current bias circuit comprises a first upper bias resistor R1 and a lower bias voltage stabilizing diode VD3, wherein the first upper bias resistor R1 is connected between the drain electrode and the grid electrode of the power switch tube V1 in a bridging way to form an upper bias branch, a light emitting diode VD2 can be connected in series in the upper bias branch to form a night indicator lamp to indicate a switch position, the cathode of the lower bias voltage stabilizing diode VD3 is connected to the grid electrode of the power switch tube V1, the anode of the lower bias voltage stabilizing diode VD3 is connected to a reference level to control the output voltage of the direct current controllable constant voltage power supply circuit, in the embodiment, the anode of the lower bias voltage stabilizing diode VD3 is connected to the output of the high-low level forming circuit, the energy storage capacitor C2 is connected to the source electrode of the power switch tube V1 and the cathode of the direct current output side of the rectifying circuit, the output power supply VCC2 of the source electrode of the power switch tube V1 is used for providing a working power supply for the capacitor input circuit and the high-low level forming circuit after the voltage stabilizing integrated circuit U1 is stabilized, and the voltage stabilizing circuit HT is controlled by the low voltage integrated circuit is controlled by the voltage stabilizing circuit, such as a three-terminal voltage stabilizing circuit is triggered by the voltage stabilizing circuit 50.
The electronic switch and the trigger circuit are composed of a thyristor VT1 of the electronic switch and a thyristor trigger circuit; the thyristor VT1 is a unidirectional thyristor. The thyristor is bridged on the positive and negative ends of the direct current output side of the bridge rectifier circuit UR, the thyristor trigger circuit is formed by connecting a current limiting resistor R2 and a trigger threshold voltage stabilizing diode VD4 in series, the serial branch of the current limiting resistor R2 and the trigger threshold voltage stabilizing diode VD4 is connected between the source electrode of the power switch tube V1 and the gate electrode of the thyristor VT1, the anode of the trigger threshold voltage stabilizing diode VD4 is connected with the gate electrode of the thyristor VT1, and the positive and negative ends of the direct current output side of the bridge rectifier circuit UR are connected with an anti-interference capacitor C1 in parallel; the anti-backflow diode VD1 is connected in series to the current input side of a constant voltage circuit composed of the power switch tube V1, the direct current bias circuit and the energy storage capacitor C2.
An anti-interference circuit formed by a delay capacitor C3 and a delay resistor R3 is also connected in parallel between the gate electrode of the thyristor VT1 and the negative electrode of the direct current output side of the rectifying circuit, so that the thyristor VT1 can be prevented from being triggered by an interference signal by mistake to cause misoperation.
The circuit is also provided with a conduction discharge resistor R4, and the conduction discharge resistor R4 is connected between the output end of the high-low level forming circuit and the negative electrode of the direct current output side of the rectifying circuit.
Specific example 2: in this embodiment, as shown in fig. 2, on the basis of embodiment 1, the lower bias of the power switch V1 further includes a bias triode V2, a second upper bias resistor R5 and a lower bias resistor R6, where the bias triode V2 is NPN, the collector and the emitter of the bias triode V2 are connected to the anode of the lower bias zener diode VD3 and the output dc power VCC2 of the voltage regulator integrated circuit U1, the second upper bias resistor R5 and the lower bias resistor R6 are connected in series and then connected to the output power VCC1 of the source of the power switch V1 and the output end of the high-low level forming circuit, and the base of the bias triode V2 is connected to the connection midpoint of the second upper bias resistor R5 and the lower bias resistor R6. The embodiment is further provided with a conductive discharge resistor R4, and the conductive discharge resistor R4 is connected between the output end of the high-low level forming circuit and the direct current power supply VCC 2.
Specific example 3: in this embodiment, the present invention provides a two-way electronic touch switch control circuit, as shown in fig. 3, where the two-way electronic touch switch control circuit is provided with a one-way dc controllable constant voltage power supply circuit, two-way capacitance input circuits, two-way high-low level forming circuits, and two-way electronic switches and trigger circuits to form a two-way touch switch control circuit, and structures of the two-way capacitance input circuits, the two-way high-low level forming circuits, the two-way electronic switches and the trigger circuits are respectively the same.
The two high-low level forming circuits are formed by two bistable circuits consisting of a double-single-channel touch induction switch chip U3. Taking one of the two paths of capacitance input circuits as an example, the capacitance input circuit is also composed of a touch sheet M and a trigger sensitivity adjusting capacitor C6, one end of the trigger sensitivity adjusting capacitor C6 is connected with a power VCC cathode, the other end of the trigger sensitivity adjusting capacitor C6 is connected with the touch sheet M and simultaneously serves as an output end of the capacitance input circuit, and an output end of the capacitance input circuit is connected with one path of input end in the double-single-channel touch sensing switch chip U3.
The direct current controllable constant voltage power supply circuit comprises a rectifying circuit, an anti-backflow diode VD1, an energy storage capacitor C2, a power switch tube V1 and a direct current bias circuit. The rectification circuit is a half-wave rectification circuit composed of rectification diodes VD1, the alternating current input side of the half-wave rectification circuit is used as a wiring terminal to be connected in a mains supply live wire in series, and the rectification diodes VD1 are used as anti-backflow diodes VD1 at the same time. The power switch tube V1 is an insulated gate type MOS field effect tube or a Darlington tube, preferably an insulated gate type MOS field effect tube is adopted, the direct current bias circuit comprises a first upper bias resistor R1 and a lower bias voltage stabilizing diode VD3, the first upper bias resistor R1 is connected between the drain electrode and the grid electrode of the power switch tube V1 in a bridging mode, the cathode of the lower bias voltage stabilizing diode VD3 is connected to the grid electrode of the power switch tube V1, the anode of the lower bias voltage stabilizing diode VD3 is connected to the cathode of the direct current output side of the half-wave rectification circuit, the energy storage capacitor C2 is connected to the source electrode of the power switch tube V1 and the cathode of the direct current output side of the half-wave rectification circuit, and the output power supply VCC2 of the source electrode of the power switch tube V1 supplies a working power supply for the capacitor input circuit and the high-low level forming circuit after the voltage stabilizing of the voltage stabilizing integrated circuit U1.
Two paths of electronic switches and trigger circuits take one path as an example, the electronic switches and the trigger circuits comprise a thyristor VT1 of the electronic switches and a thyristor trigger circuit, the thyristor is a bidirectional thyristor, the thyristor is bridged on the positive end and the negative end of the direct current output side of the half-wave rectifying circuit, the thyristor trigger circuit is formed by connecting a photoelectric coupler and a trigger threshold voltage stabilizing diode VD4 in series, the output side of the photoelectric coupler and the serial branch of the trigger threshold voltage stabilizing diode VD4 are connected between the input end of an alternating current power supply and the gate electrode of the thyristor VT1, and the output end of the high-low level forming circuit is connected with the input side of the photoelectric coupler in series through a current limiting resistor R7 to the negative electrode of the direct current output side of the half-wave rectifying circuit. A charging diode VD6 is connected between the cathode of the trigger threshold voltage stabilizing diode VD4 and the source of the power switch tube V1.
Claims (10)
1. A single live wire capacitive wall touch switch control circuit is characterized in that: the device comprises a capacitance input circuit, a high-low level forming circuit, a direct-current controllable constant-voltage power supply circuit, an electronic switch and a trigger circuit; the capacitive input circuit consists of a touch sheet and a trigger sensitivity adjusting capacitor, wherein one end of the trigger sensitivity adjusting capacitor is connected with the negative electrode of the power supply, and the other end of the trigger sensitivity adjusting capacitor is connected with the touch sheet and is used as the output end of the capacitive input circuit; the high-low level forming circuit is composed of a bistable circuit composed of single-channel touch sensing switch chips, the single-channel touch sensing switch chips are RH6030 or TTP223 special touch chips, the output end of the capacitance input circuit is connected with the input end of the high-low level forming circuit, and when the capacitance of the input end of the high-low level forming circuit is increased, the level of the output end of the high-low level forming circuit is turned over; the electronic switch and the trigger circuit comprise thyristors and a thyristor trigger circuit which form the electronic switch, and the thyristors are connected in series in an alternating current main circuit of the touch switch control circuit;
the direct current controllable constant voltage power supply circuit comprises a rectifying circuit, an anti-backflow diode, an energy storage capacitor, a power switch tube and a direct current bias circuit, wherein the power switch tube is an insulated gate type MOS field effect tube or a Darlington tube, the direct current bias circuit comprises a first upper bias resistor and a lower bias voltage stabilizing diode, the first upper bias resistor is connected between a drain electrode and a grid electrode of the power switch tube in a bridging way to form an upper bias branch, a cathode of the lower bias voltage stabilizing diode is connected to the grid electrode of the power switch tube, an anode of the lower bias voltage stabilizing diode is connected to a reference level to control the output voltage of the direct current controllable constant voltage power supply circuit, the energy storage capacitor is connected to a source electrode of the power switch tube and a cathode of a direct current output side of the rectifying circuit, an output power supply of the source electrode of the power switch tube is stabilized by the voltage stabilizing integrated circuit to provide a working power supply for the capacitor input circuit and a high-low-level forming circuit, and the output of the high-low-level forming circuit controls the electronic switch and the trigger circuit; the anti-backflow diode is connected in series with the current input side of a constant voltage circuit formed by the power switching tube, the direct current bias circuit and the energy storage capacitor;
the rectifier circuit is a bridge rectifier circuit, an alternating current input side of the bridge rectifier circuit is used as a wiring terminal to be connected in series in a commercial power live wire, the thyristor is a unidirectional thyristor, the thyristor is connected on the positive end and the negative end of a direct current output side of the bridge rectifier circuit in a bridging mode, the thyristor trigger circuit is formed by connecting a current limiting resistor and a trigger threshold voltage stabilizing diode in series, and a serial branch circuit of the current limiting resistor and the trigger threshold voltage stabilizing diode is connected between a source electrode of a power switch tube and a gate electrode of the thyristor.
2. The single fire wire capacitive wall touch switch control circuit of claim 1, wherein: the anode of the lower bias zener diode is connected to the output end of the high-low level forming circuit.
3. The single fire wire capacitive wall touch switch control circuit of claim 2, wherein: and the on-state discharge resistor is connected between the output end of the high-low level forming circuit and the negative electrode of the direct current output side of the rectifying circuit.
4. The single fire wire capacitive wall touch switch control circuit of claim 1, wherein: the rectifier circuit is a bridge rectifier circuit, an alternating current input side of the bridge rectifier circuit is used as a terminal to be connected in series in a mains supply live wire, the thyristor is a unidirectional thyristor, the thyristor is connected on the positive and negative ends of a direct current output side of the bridge rectifier circuit in a bridging mode, the thyristor trigger circuit is formed by connecting a current limiting resistor and a trigger threshold voltage stabilizing diode in series, and a serial branch of the current limiting resistor and the trigger threshold voltage stabilizing diode is connected between a source electrode of a power switch tube and a gate electrode of the thyristor; the power switch tube lower bias also comprises a bias triode, a second upper bias resistor and a lower bias resistor, wherein the bias triode is NPN, the collector and the emitter of the bias triode are respectively connected with the anode of the lower bias zener diode and the output direct current power supply of the voltage stabilizing integrated circuit, the second upper bias resistor and the lower bias resistor are connected in series and then are connected to the output power supply of the source electrode of the power switch tube and the output end of the high-low level forming circuit, and the base electrode of the bias triode is connected to the connecting midpoint of the second upper bias resistor and the lower bias resistor.
5. The single fire wire capacitive wall touch switch control circuit of claim 4, wherein: the high-low level forming circuit is also provided with a conduction discharge resistor which is connected between the output end of the high-low level forming circuit and the direct current power supply.
6. A single fire wire capacitive wall touch switch control circuit according to any one of claims 2 to 5 wherein: an anti-interference circuit formed by a delay capacitor and a delay resistor is also connected in parallel between the gate electrode of the thyristor and the negative electrode of the direct current output side of the rectifying circuit.
7. A single fire wire capacitive wall touch switch control circuit according to any one of claims 2 to 5 wherein: the upper bias branch is also connected with a light emitting diode in series to form a night indicator lamp.
8. The single fire wire capacitive wall touch switch control circuit of claim 6, wherein: the upper bias branch is also connected with a light emitting diode in series to form a night indicator lamp.
9. The single fire wire capacitive wall touch switch control circuit of claim 1, wherein: the double-circuit touch switch control circuit is formed by a direct-current controllable constant-voltage power supply circuit, two capacitance input circuits, two high-low level forming circuits, two electronic switches and a trigger circuit, wherein the structures of the two capacitance input circuits, the two high-low level forming circuits, the two electronic switches and the trigger circuit are respectively the same; the two high-low level forming circuits are formed by two bistable circuits consisting of double single-channel touch sensing switch chips;
the rectification circuit is a half-wave rectification circuit formed by rectification diodes, an alternating current input side of the half-wave rectification circuit is used as a wiring terminal and is connected in series in a mains supply live wire, the power switch tube is an insulated gate type MOS field effect tube or a Darlington tube, the direct current bias circuit comprises a first upper bias resistor and a lower bias voltage stabilizing diode, the first upper bias resistor is connected between a drain electrode and a grid electrode of the power switch tube in a bridging mode, a cathode of the lower bias voltage stabilizing diode is connected to the grid electrode of the power switch tube, an anode of the lower bias voltage stabilizing diode is connected to a cathode of a direct current output side of the half-wave rectification circuit, the energy storage capacitor is connected to a source electrode of the power switch tube and a cathode of the direct current output side of the half-wave rectification circuit, and an output power supply of the source electrode of the power switch tube is used for providing a working power supply for the capacitor input circuit and the high-low level forming circuit after the voltage stabilization of the voltage stabilizing integrated circuit;
the thyristor is a bidirectional thyristor, the thyristor is bridged on the positive end and the negative end of the direct current output side of the half-wave rectifying circuit, the thyristor trigger circuit is formed by connecting a photoelectric coupler and a trigger threshold voltage stabilizing diode in series, the output side of the photoelectric coupler and the serial branch of the trigger threshold voltage stabilizing diode are connected between the input end of an alternating current power supply and the gate electrode of the thyristor, and the output end of the high-low level forming circuit is connected to the negative end of the direct current output side of the half-wave rectifying circuit in series through a current limiting resistor and the input side of the photoelectric coupler.
10. The single fire wire capacitive wall touch switch control circuit of claim 1, wherein: and a charging diode is connected between the cathode of the trigger threshold voltage stabilizing diode and the source electrode of the power switch tube.
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| CN201611034296.4A CN106793372B (en) | 2016-11-22 | 2016-11-22 | Single live wire capacitive wall touch switch control circuit |
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| CN201611034296.4A CN106793372B (en) | 2016-11-22 | 2016-11-22 | Single live wire capacitive wall touch switch control circuit |
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| CN106793372B true CN106793372B (en) | 2024-04-09 |
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| JP2016173952A (en) * | 2015-03-17 | 2016-09-29 | 東芝ライテック株式会社 | Human sensor switch circuit |
| CN206237653U (en) * | 2016-11-22 | 2017-06-09 | 刘冰冰 | A kind of single live wire condenser type wall touch switch control circuit |
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| CN105338686A (en) * | 2014-08-09 | 2016-02-17 | 绿仕环保科技（上海）有限公司 | High-reliability intelligent switch device |
| CN104159381A (en) * | 2014-09-04 | 2014-11-19 | 张小亚 | Touch switch control circuit of fading type delay lamp |
| CN204498406U (en) * | 2014-12-09 | 2015-07-22 | 重庆西胜电子科技有限公司 | Touch/wireless remote control light modulation lamp |
| JP2016173952A (en) * | 2015-03-17 | 2016-09-29 | 東芝ライテック株式会社 | Human sensor switch circuit |
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| CN106793372A (en) | 2017-05-31 |
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