CN104656480A - Circuit controlled by light touch switch - Google Patents
Circuit controlled by light touch switch Download PDFInfo
- Publication number
- CN104656480A CN104656480A CN201510001964.2A CN201510001964A CN104656480A CN 104656480 A CN104656480 A CN 104656480A CN 201510001964 A CN201510001964 A CN 201510001964A CN 104656480 A CN104656480 A CN 104656480A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electrode
- npn pipe
- series
- electric capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a circuit controlled by a light touch switch. The circuit comprises a PMOS transistor Q1 and NPN transistors (Q2, Q3 and Q4), wherein the drain electrode of the Q1 is connected with a power source; the source electrode of the Q1 is connected with an LED, and earthed; the grid electrode of the Q1 is connected with the collecting electrode of the Q4; a resistor I is connected between the grid electrode of the Q1 and the drain electrode of the Q1; the base electrode of the Q2 is connected with the collecting electrode of the Q3; the collecting electrode of the Q2 is connected with a resistor II and the power source; the emitting electrode of the Q2 is earthed; the base electrode of the Q3 is earthed through a capacitance I; a capacitance II and a switch are connected in series between the collecting electrode of the Q3 and the base electrode of the Q3; the base electrode of the Q4 is connected with a resistor III, earthed, and connected with the base electrode of the Q3; the emitting electrode of the Q4 is earthed. The circuit has the advantages that a small-size light touch switch can be used for controlling a high-current circuit, so that the requirement of portable lighting equipment which is relatively high in power but relatively small in size can be met.
Description
Technical field
The invention belongs to ON-OFF control circuit field, particularly relate to a kind of touch switch control circuit.
Background technology
Along with the development of society, the demand of people to portable equipment increases day by day, there has also been certain requirement to some push-button type of product simultaneously.The illuminating product that power is larger under normal circumstances, gauge tap used is generally closo or cut-off type switch and volume and can to bear electric current generally large than touch-switch.How touch switch in the application of this field, this is just to designing the great challenge of proposition one.
Summary of the invention
The present invention is directed to above-mentioned technical matters, provide a kind of more practical circuit frame, make illuminating product volume and bear electric current less.
To achieve these goals, the present invention is achieved by the following technical solutions:
A kind of touch switch control circuit, comprise PMOS Q1, NPN pipe Q2, NPN pipe Q3 and NPN pipe Q4, the drain electrode of described PMOS Q1 is connected on power supply, source series resistance R8, great power LED ground connection, gate series resistance R5 is also connected to the collector of NPN pipe Q4, contact resistance R1 between grid and drain electrode; Described NPN pipe Q2 base series load circuit is also connected to the collector of NPN pipe Q3, resistance R7 and R9, collector series resistance R6 connect power supply, grounded emitter; Described NPN pipe Q3 base stage connects electric capacity C1, C3, resistance R4, wherein C3 ground connection, resistance in series R9 and interrupteur SW 1 between collector and base stage; Described NPN pipe Q4 base stage contact resistance R3 ground connection, contact resistance R10, R4 are also connected with the base stage of Q3, grounded emitter.
Further, interrupteur SW 1 is touch-switch.
Further, positive source resistance in series R6, R4, electric capacity C3 ground connection, power sources in series resistance R7, R9, electric capacity C4 ground connection.
Further, the load circuit that NPN pipe Q2 base stage connects is the circuit by resistance R2 and electric capacity C2 parallel connection.
Further, great power LED contact resistance R8, plus earth.
Further, the resistance of resistance R9 is greater than resistance R7.
After access battery, because electric capacity C3 is not full of electricity, so Q3 cut-off, Q2 obtains high voltage conducting due to intrinsic standoff ratio, and Q4 and Q1 cut-off, great power LED can not be lighted; After pressing touch-switch SW1, electric capacity C3 charges, Q3 conducting, and Q2 ends, thus Q4 and Q1 conducting, great power LED is lighted; After pressing touch-switch SW1 again, Q3 base voltage is again lowered and ends, now Q2 conducting, Q4 and Q1 ends, and great power LED extinguishes.
The present invention, by the charging of touch-switch SW1 control capacitance C3, changes the height of Q3 base voltage, determines Q3 conducting or cut-off, and then affects conducting or the cut-off of Q1, Q2 and Q4 in subsequent conditioning circuit, controls great power LED lighting and extinguishing after access battery.
figure of description
Fig. 1 is the frame diagram of touch switch control circuit.
Embodiment
Do below by specific embodiment and state further:
The drain electrode of PMOS Q1 is connected on positive source, source series resistance R8, great power LED ground connection, and gate series resistance R5 is also connected to the collector of NPN pipe Q4, contact resistance R1 between grid and drain electrode; The base series of NPN pipe Q2 by the load circuit of resistance R2 and electric capacity C2 parallel connection, and is connected to the collector of NPN pipe Q3, resistance R7 and R9, collector series resistance R6 connect positive source, grounded emitter; The base stage of NPN pipe Q3 connects electric capacity C1, C3, resistance R4, wherein C3 ground connection, resistance in series R9 and touch-switch SW1 between collector and base stage; The base stage contact resistance R3 of NPN pipe Q4 ground connection, contact resistance R10, R4 are also connected with the base stage of Q3, grounded emitter.Positive source resistance in series R6, R4, electric capacity C3 ground connection, positive source resistance in series R7, R9, electric capacity C4 ground connection.
After circuit access battery, battery BT1 is charged to electric capacity C3 by R6 and R4, is charged by R7 and R9 to electric capacity C4 simultaneously; Because Q3 base series electric capacity C3 is to ground, when electric capacity C3 is not full of electricity, the base voltage of Q3 is less than cut-in voltage, thus Q3 not conducting.Electric capacity C4 is when charging, R7 and R9 forms intrinsic standoff ratio, R9 adopts 220K to be the resistance of 8.2K much larger than R7, therefore the base stage of Q2 gets high level and conducting, thus making Q3 and Q4 base stage be low level, Q3 and Q4 ends, and PMOS Q1 grid is high level, Q1 ends, and thus great power LED can not be lighted when accessing battery.When pressing touch-switch SW1 moment, battery is charged to electric capacity C3 by R7 and R9, and Q3 base stage becomes high level and conducting, thus Q2 base level is dragged down, Q2 ends, and Q4 base stage is high level and conducting, PMOS Q1 grid becomes low level, and PMOS conducting, great power LED is lighted.When again pressing touch-switch SW1 moment, Q3 base potential is dragged down by electric capacity C4 and ends, now Q2 conducting immediately, thus Q3, Q4, Q1 cut-off, great power LED extinguishes.Like this whenever pressing touch-switch SW1, the state of Q2 and Q3 all can be exchanged, thus the lighting and extinguishing of control LED.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a touch switch control circuit, it is characterized in that: comprise PMOS Q1, NPN pipe Q2, NPN pipe Q3 and NPN pipe Q4, the drain electrode of described PMOS Q1 is connected on power supply, source series resistance R8, great power LED ground connection, gate series resistance R5 is also connected to the collector of NPN pipe Q4, contact resistance R1 between grid and drain electrode; The base series load circuit of described NPN pipe Q2 is also connected to the collector of NPN pipe Q3, resistance R7 and R9, collector series resistance R6 connect power supply, grounded emitter; The base stage of described NPN pipe Q3 connects electric capacity C1, C3, resistance R4, wherein C3 ground connection, resistance in series R9 and interrupteur SW 1 between collector and base stage; The base stage contact resistance R3 of described NPN pipe Q4 ground connection, contact resistance R10, R4 are also connected with the base stage of Q3, grounded emitter.
2. ON-OFF control circuit according to claim 1, is characterized in that: interrupteur SW 1 is touch-switch.
3. ON-OFF control circuit according to claim 1, is characterized in that: positive source resistance in series R6, R4, electric capacity C3 ground connection, power sources in series resistance R7, R9, electric capacity C4 ground connection.
4. ON-OFF control circuit according to claim 1, is characterized in that: the load circuit that NPN pipe Q2 base stage connects is the circuit by resistance R2 and electric capacity C2 parallel connection.
5. ON-OFF control circuit according to claim 1, is characterized in that: great power LED contact resistance R8, plus earth.
6. the ON-OFF control circuit according to claim 1 or 3, is characterized in that: the resistance of resistance R9 is greater than resistance R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001964.2A CN104656480B (en) | 2015-01-05 | 2015-01-05 | A kind of touch switch controls circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001964.2A CN104656480B (en) | 2015-01-05 | 2015-01-05 | A kind of touch switch controls circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104656480A true CN104656480A (en) | 2015-05-27 |
| CN104656480B CN104656480B (en) | 2017-09-19 |
Family
ID=53247755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510001964.2A Active CN104656480B (en) | 2015-01-05 | 2015-01-05 | A kind of touch switch controls circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104656480B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436995A (en) * | 1990-05-31 | 1992-02-06 | Nec Home Electron Ltd | Lighting control device of illumination fixture |
| US20100007405A1 (en) * | 2008-07-09 | 2010-01-14 | Chi-Jen Wang | Non-contact touch switch |
| CN201657409U (en) * | 2010-01-05 | 2010-11-24 | 蒋韵坚 | Novel single-key tact switch circuit |
| CN103178816A (en) * | 2011-12-26 | 2013-06-26 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lighting |
| CN103458552A (en) * | 2012-05-30 | 2013-12-18 | 海洋王照明科技股份有限公司 | LED lamp and start control circuit thereof |
| CN103582219A (en) * | 2012-08-07 | 2014-02-12 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lamp |
| CN104113956A (en) * | 2013-04-22 | 2014-10-22 | 深圳市海洋王照明工程有限公司 | Lighting switch control circuit and lamp |
-
2015
- 2015-01-05 CN CN201510001964.2A patent/CN104656480B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436995A (en) * | 1990-05-31 | 1992-02-06 | Nec Home Electron Ltd | Lighting control device of illumination fixture |
| US20100007405A1 (en) * | 2008-07-09 | 2010-01-14 | Chi-Jen Wang | Non-contact touch switch |
| CN201657409U (en) * | 2010-01-05 | 2010-11-24 | 蒋韵坚 | Novel single-key tact switch circuit |
| CN103178816A (en) * | 2011-12-26 | 2013-06-26 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lighting |
| CN103458552A (en) * | 2012-05-30 | 2013-12-18 | 海洋王照明科技股份有限公司 | LED lamp and start control circuit thereof |
| CN103582219A (en) * | 2012-08-07 | 2014-02-12 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lamp |
| CN104113956A (en) * | 2013-04-22 | 2014-10-22 | 深圳市海洋王照明工程有限公司 | Lighting switch control circuit and lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104656480B (en) | 2017-09-19 |
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