CN203574913U - Power supply control circuit used for multimedia projector - Google Patents
Power supply control circuit used for multimedia projector Download PDFInfo
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- CN203574913U CN203574913U CN201320780563.8U CN201320780563U CN203574913U CN 203574913 U CN203574913 U CN 203574913U CN 201320780563 U CN201320780563 U CN 201320780563U CN 203574913 U CN203574913 U CN 203574913U
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- triode
- resistance
- diode
- relay
- power supply
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Abstract
The utility model discloses a power supply control circuit used for a multimedia projector. The power supply control circuit used for the multimedia projector includes a DC power supply, an AC contactor, a first relay, a second relay, first to tenth resistors, first to sixth triodes, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a potentiometer, a field effect transistor and a button switch. Compared with the prior art, the power supply of the power supply control circuit used for the multimedia projector can be powered off, normal power-off of a projection lamp will not be influenced, and a problem that a projector may be damaged if a user does not pay attention to the power-off sequence is overcome; and power supply control circuit used for the multimedia projector is long in service life, comparatively simple in circuit structure and low in manufacturing cost, and has a comparatively high popularization value.
Description
Technical field
The utility model relates to a kind of power control circuit, relates in particular to a kind of power control circuit for multimedia projector.
Background technology
In recent years, large-screen becomes the most popular keyword in demonstration field, and the non-projector of the product that is in large-screen leading position does not belong to, along with the decline of projector's price and enriching of function thereof, home projector market obtains unprecedented development opportunity, this trend of coming into gradually common people house with projector is instantly relevant, the country of projector market comparative maturity abroad, domestic consumer's demand accounts for the more than 20% of the total market size, but use projection market at Chinese Home, family user market also rests on cultivates and developing stage, the purchase of home projector is individual behaviour, not yet form actual purchasing power and the consuming capacity of scale, it is the most important part of projector that power supply is controlled, higher for the general cost of manufacture of power control circuit of multimedia projector now, useful life is shorter, be unfavorable for the penetration and promotion of projector on market.
Utility model content
The purpose of this utility model provides a kind of power control circuit for multimedia projector with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises DC power supply, A.C. contactor, the first relay, the second relay, the first resistance to the ten resistance, the first triode to the six triodes, the first diode, the second diode, the 3rd diode, the 4th diode, the first electric capacity, the second electric capacity, the 3rd electric capacity, potentiometer, field effect transistor and push-button switch, the anodal while of described DC power supply and the first end of described the tenth resistance, the first end of described the second relay coil, the negative pole of described the 4th diode, the first end of described the first relay coil, the negative pole of described the second diode, the first end of described the 7th resistance, the emitter of described the first triode, the first end of described potentiometer is connected with the first end of described the first resistance, the negative pole while of described DC power supply and the first end of described ac contactor coil, the emitter of described the 6th triode, the negative pole of described the 3rd electric capacity, the first end of described second relay the second contact, the negative pole of described the 3rd diode, the negative pole of described the second electric capacity, the emitter of described the second triode, the first end of described the 6th resistance, the source electrode of described field effect transistor, the negative pole of described the first electric capacity is connected with the first end of described second relay the first contact, the second end of described ac contactor coil is connected with the first end of described the second relay the 3rd contact, the second end of described relay the second contact is connected with the second end of described the tenth resistance, the collector electrode while of described the 6th triode and the second end of described the second relay coil, the positive pole of described the 4th diode is connected with the collector electrode of described the 5th triode, and the emitter of described the 5th triode is connected with the base stage of described the 6th triode, the base stage while of described the 5th triode and the positive pole of described the 3rd electric capacity, the first end of described the 9th resistance is connected with the first end of described the 8th resistance, the second end of described the 9th resistance is connected with the second end of described second relay the second contact, the positive pole of described the 3rd diode is connected with the emitter of described the 4th triode, the collector electrode while of described the 4th triode and the second end of described the first relay coil, the positive pole of described the second diode is connected with the collector electrode of described the 3rd triode, and the emitter of described the 3rd triode is connected with the base stage of described the 4th triode, the base stage while of described the 3rd triode and the positive pole of described the second electric capacity, the second end of described the 7th resistance is connected with the collector electrode of described the second triode, the base stage of described the second triode is connected with the second end of described the 6th resistance with the first end of described the 5th resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described the 8th resistance with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with the collector electrode of described the first triode, the base stage while of described the first triode and the sliding end of described potentiometer, the second end of described potentiometer is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the positive pole of described the first diode, the negative pole of described the first diode is connected with the drain electrode of described field effect transistor, the grid of described field effect transistor is connected with the first end of described the 3rd resistance, the second end while of described the 3rd resistance and the positive pole of described the first electric capacity, described second the second end of relay the first contact and the first end of described push-button switch are connected, and the second end of described push-button switch is connected with the second end of described the first resistance.
Particularly, described DC power supply is 6V power supply, described the first triode is positive-negative-positive, described the second triode, described the 3rd triode, described the 4th triode, described the 5th triode and described the 6th triode are NPN type, described the first electric capacity, described the second electric capacity and described the 3rd electric capacity are polar capacitor, and described the first diode and described the 3rd diode are light-emitting diode.
The beneficial effects of the utility model are:
The utility model is a kind of power control circuit for multimedia projector, can directly turn off power supply and not affect normally closing of projection lamp, the situation of having avoided user not note shutdown order and having caused projector to damage, useful life is longer, and circuit structure is fairly simple, cost of manufacture is lower, has the value of higher penetration and promotion.
Accompanying drawing explanation
Fig. 1 is that the utility model is for the schematic diagram of the power control circuit of multimedia projector.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model comprises DC power supply DC, A.C. contactor KM, the first relay K 1, the second relay K 2, the first resistance R 1 is to the tenth resistance R 10, the first triode Q1 to the six triode Q6, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, potentiometer W, field effect transistor VT and push-button switch S, the contact switch of A.C. contactor KM and the first relay K 1 is all arranged on (being projection lamp place circuit) in main circuit, does not mark the anodal while of DC power supply DC and the first end of the tenth resistance R 10 in figure, the first end of the second relay K 2 coils, the negative pole of the 4th diode D4, the first end of the first relay K 1 coil, the negative pole of the second diode D2, the first end of the 7th resistance R 7, the emitter of the first triode Q1, the first end of potentiometer W is connected with the first end of the first resistance R 1, the negative pole while of DC power supply DC and the first end of A.C. contactor KM coil, the emitter of the 6th triode Q6, the negative pole of the 3rd capacitor C 3, the first end of the second relay K 2 second contacts, the negative pole of the 3rd diode D3, the negative pole of the second capacitor C 2, the emitter of the second triode Q2, the first end of the 6th resistance R 6, the source electrode of field effect transistor VT, the negative pole of the first capacitor C 1 is connected with the first end of the second relay K 2 first contacts, the second end of A.C. contactor KM coil is connected with the first end of the second relay K 2 the 3rd contact, the second end of relay the second contact is connected with the second end of the tenth resistance R 10, the collector electrode while of the 6th triode Q6 and the second end of the second relay K 2 coils, the positive pole of the 4th diode D4 is connected with the collector electrode of the 5th triode Q5, and the emitter of the 5th triode Q5 is connected with the base stage of the 6th triode Q6, the base stage while of the 5th triode Q5 and the positive pole of the 3rd capacitor C 3, the first end of the 9th resistance R 9 is connected with the first end of the 8th resistance R 8, the second end of the 9th resistance R 9 is connected with the second end of the second relay K 2 second contacts, the positive pole of the 3rd diode D3 is connected with the emitter of the 4th triode Q4, the collector electrode while of the 4th triode Q4 and the second end of the first relay K 1 coil, the positive pole of the second diode D2 is connected with the collector electrode of the 3rd triode Q3, and the emitter of the 3rd triode Q3 is connected with the base stage of the 4th triode Q4, the base stage while of the 3rd triode Q3 and the positive pole of the second capacitor C 2, the second end of the 7th resistance R 7 is connected with the collector electrode of the second triode Q2, the base stage of the second triode Q2 is connected with the second end of the 6th resistance R 6 with the first end of the 5th resistance R 5 simultaneously, the second end of the 5th resistance R 5 is connected with the second end of the 8th resistance R 8 with the first end of the 4th resistance R 4 simultaneously, the second end of the 4th resistance R 4 is connected with the collector electrode of the first triode Q1, the base stage while of the first triode Q1 and the sliding end of potentiometer W, the second end of potentiometer W is connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with the positive pole of the first diode D1, the negative pole of the first diode D1 is connected with the drain electrode of field effect transistor VT, the grid of field effect transistor VT is connected with the first end of the 3rd resistance R 3, the second end while of the 3rd resistance R 3 and the positive pole of the first capacitor C 1, the second end of the second relay K 2 first contacts is connected with the first end of push-button switch S, and the second end of push-button switch S is connected with the second end of the first resistance R 1, and wherein DC power supply DC is 6V power supply, and the first triode Q1 is positive-negative-positive, the second triode Q2, the 3rd triode Q3, the 4th triode Q4, the 5th triode Q5 and the 6th triode Q6 are NPN type, the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3 are polar capacitor, and the first diode D1 and the 3rd diode D3 are light-emitting diode.
Claims (2)
1. for a power control circuit for multimedia projector, it is characterized in that: comprise DC power supply, A.C. contactor, the first relay, the second relay, the first resistance to the ten resistance, the first triode to the six triodes, the first diode, the second diode, the 3rd diode, the 4th diode, the first electric capacity, the second electric capacity, the 3rd electric capacity, potentiometer, field effect transistor and push-button switch, the anodal while of described DC power supply and the first end of described the tenth resistance, the first end of described the second relay coil, the negative pole of described the 4th diode, the first end of described the first relay coil, the negative pole of described the second diode, the first end of described the 7th resistance, the emitter of described the first triode, the first end of described potentiometer is connected with the first end of described the first resistance, the negative pole while of described DC power supply and the first end of described ac contactor coil, the emitter of described the 6th triode, the negative pole of described the 3rd electric capacity, the first end of described second relay the second contact, the negative pole of described the 3rd diode, the negative pole of described the second electric capacity, the emitter of described the second triode, the first end of described the 6th resistance, the source electrode of described field effect transistor, the negative pole of described the first electric capacity is connected with the first end of described second relay the first contact, the second end of described ac contactor coil is connected with the first end of described the second relay the 3rd contact, the second end of described relay the second contact is connected with the second end of described the tenth resistance, the collector electrode while of described the 6th triode and the second end of described the second relay coil, the positive pole of described the 4th diode is connected with the collector electrode of described the 5th triode, and the emitter of described the 5th triode is connected with the base stage of described the 6th triode, the base stage while of described the 5th triode and the positive pole of described the 3rd electric capacity, the first end of described the 9th resistance is connected with the first end of described the 8th resistance, the second end of described the 9th resistance is connected with the second end of described second relay the second contact, the positive pole of described the 3rd diode is connected with the emitter of described the 4th triode, the collector electrode while of described the 4th triode and the second end of described the first relay coil, the positive pole of described the second diode is connected with the collector electrode of described the 3rd triode, and the emitter of described the 3rd triode is connected with the base stage of described the 4th triode, the base stage while of described the 3rd triode and the positive pole of described the second electric capacity, the second end of described the 7th resistance is connected with the collector electrode of described the second triode, the base stage of described the second triode is connected with the second end of described the 6th resistance with the first end of described the 5th resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described the 8th resistance with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with the collector electrode of described the first triode, the base stage while of described the first triode and the sliding end of described potentiometer, the second end of described potentiometer is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the positive pole of described the first diode, the negative pole of described the first diode is connected with the drain electrode of described field effect transistor, the grid of described field effect transistor is connected with the first end of described the 3rd resistance, the second end while of described the 3rd resistance and the positive pole of described the first electric capacity, described second the second end of relay the first contact and the first end of described push-button switch are connected, and the second end of described push-button switch is connected with the second end of described the first resistance.
2. the power control circuit for multimedia projector according to claim 1, it is characterized in that: described DC power supply is 6V power supply, described the first triode is positive-negative-positive, described the second triode, described the 3rd triode, described the 4th triode, described the 5th triode and described the 6th triode are NPN type, described the first electric capacity, described the second electric capacity and described the 3rd electric capacity are polar capacitor, and described the first diode and described the 3rd diode are light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780563.8U CN203574913U (en) | 2013-11-29 | 2013-11-29 | Power supply control circuit used for multimedia projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780563.8U CN203574913U (en) | 2013-11-29 | 2013-11-29 | Power supply control circuit used for multimedia projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574913U true CN203574913U (en) | 2014-04-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320780563.8U Expired - Fee Related CN203574913U (en) | 2013-11-29 | 2013-11-29 | Power supply control circuit used for multimedia projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203574913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714488A (en) * | 2018-05-14 | 2018-10-30 | 商洛学院 | A kind of chemical experiment centrifuge |
-
2013
- 2013-11-29 CN CN201320780563.8U patent/CN203574913U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714488A (en) * | 2018-05-14 | 2018-10-30 | 商洛学院 | A kind of chemical experiment centrifuge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20141129 |
|
| EXPY | Termination of patent right or utility model |