CN209433217U - It is a kind of environmental protection power supply controllable multi-medium in control circuit - Google Patents
It is a kind of environmental protection power supply controllable multi-medium in control circuit Download PDFInfo
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- CN209433217U CN209433217U CN201920145814.2U CN201920145814U CN209433217U CN 209433217 U CN209433217 U CN 209433217U CN 201920145814 U CN201920145814 U CN 201920145814U CN 209433217 U CN209433217 U CN 209433217U
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Abstract
The utility model discloses circuit is controlled in a kind of environmental protection power supply controllable multi-medium, 5V power supply is separately connected signal buffer, driver, sound view control relay and plant-grid connection relay；Power supply control signal and equipment the selection input terminal of signal buffer connect the corresponding output end of master controller respectively, the sound of signal buffer connects the control terminal of audio driver and video driving module depending on control output end respectively, the driver connected input terminal in the power supply control output end of signal buffer, three output ends of driver connect sound view control relay respectively, the input terminal of plant-grid connection relay and backlight controller, sound connects the direct-flow input end of audio driver and video driving module depending on controlling the output end of relay respectively, the output of plant-grid connection relay terminates projector's power interface, the output of backlight controller terminates backlight socket.The utility model can control the direct current on-off of audio driver and video driver according to working condition, realize energy conservation, extend device lifetime.
Description
Technical field
The utility model relates to multimedia teaching facility technical fields, and in particular to it is a kind of environmental protection power supply controllable multi-medium in
Control circuit.
Background technique
With the development of science and technology, multimedia teaching facility has gradually replaced traditional educational aid, provided for user
Better operating environment.It is cumbersome but since classroom furniture is too many, puzzled even conflict is brought to many users,
The utilization rate for reducing equipment indirectly, thereby reduces the use value in life period of equipment.And circuit control is controlled in using
Classroom wall-hanging integrated machine system be more convenient user's use.But often charged in wall-hanging integrated machine system practical application, and set
Standby is that time segment uses, and whole circuits are all powered after usually middle control power on circuitry, and only subelement has low-power consumption
Suspend mode, such as power supply will cause waste of energy for a long time, change the performance of device, and accelerated ageing manually controls power supply increasing
Add using for client difficult；5V power technology is mature in the market, and yield is at low cost greatly, if switch control brings pressure drop to ask
Topic, can bring problem to the long-time service of subelement.
Utility model content
The technical problems to be solved in the utility model is overcome the deficiencies in the prior art and provides a kind of environmental protection for electrically controllable
Multimedia middle control system circuit can control the direct current on-off of audio driver and video driver according to working condition, realize section
Can, extend device lifetime.
In order to solve the above technical problems, technical solution adopted in the utility model is:
Circuit is controlled in a kind of environmental protection power supply controllable multi-medium, including 5V power supply, master controller U0, signal buffer Us2, is driven
Dynamic device Ud, sound view control relay JCX1, plant-grid connection relay JCX2, projector power interface Jp220, backlight socket
JP11, audio driver Ua1 and video driving module；The 5V power supply is separately connected signal buffer Us2, driver Ud, sound
Depending on controlling relay JCX1 and plant-grid connection relay JCX2；The signal buffer Us2 has power supply control signal, equipment
Select input terminal, power supply control output end, audio frequency control output end, video control output end, and the electricity of signal buffer Us2
Source control signal and equipment selection input terminal are separately connected the corresponding output end of master controller U0, the sound of signal buffer Us2
Frequency control output end connects audio driver Ua1 control terminal, and the video control output end of signal buffer Us2 connects video drive
The control terminal of module, the input terminal of the power supply control output end connection driver Ud of signal buffer Us2, three of driver Ud
Output end is separately connected the input terminal of sound view control relay JCX1, plant-grid connection relay JCX2 and backlight controller, sound view
The output end of control relay JCX1 is separately connected the DC supply input of audio driver Ua1 and video driving module, electricity
The control terminal of output end connection projector's power interface Jp220 of source cut-in relay JCX2, the output end of backlight controller connect
Connect the backlight electric power end of backlight socket JP11.
Further, the video driving module includes that video driver Uvga1, video driver Uvga2 and single channel are non-
Door Us1；The video control output end of signal buffer Us2 includes control selections end and control enable end, control selections end difference
Be connected with a control terminal of video driver Uvga1 and video driver Uvga2, control enable end respectively with single channel NOT gate
The input terminal of Us1 is connected with another control terminal of video driver Uvga1, the output end and video drive of single channel NOT gate Us1
Another control terminal of device Uvga2 is connected.
Further, the master controller U0 uses single-chip microcontroller, the model 74hc244 of signal buffer Us2, driver
The model uln2003 of Ud, the model HK4100F of sound view control relay JCX1, the model of plant-grid connection relay JCX2
For SRD-05VDC-SL-C, backlight controller includes resistance R1k, R2k and Darlington triode T1, the type of audio driver Ua1
Number be 74hc4052, the model SN74AHC1G04DBVR of single channel NOT gate Us1；The pin 2,4 and 6 of the signal buffer Us2
It receives the power supply from master controller U0 and controls input signal pw_on, the pin 11 and 15 of signal buffer Us2, which receives, to be come
Input signal sel1 is selected from the first equipment of master controller U0, the pin 13 and 17 of signal buffer Us2 is received from total
The second equipment of controller U0 selects input signal sel2, the audio frequency control output that the pin 7 and 9 of signal buffer Us2 exports
Signal is separately connected the pin 9 and 10 of audio driver Ua1, and the pin 5 of signal buffer Us2 is separately connected video driver
The pin 32 of Uvga1 and video driver Uvga2, the pin 3 of signal buffer Us2 are separately connected the pin 2 of single channel NOT gate Us1
With the pin 9 of video driver Uvga1, the pin 4 of single channel NOT gate Us1 connects the pin 9 of video driver Uvga2；Signal is slow
The power supply control output signal for rushing the output of pin 14,16 and 18 of device Us2 is separately connected the pin 4,2 and 1 of driver Ud；It is described
5V power supply is separately connected the pin 20 of signal buffer Us2 and the pin 9 of driver Ud, and the pin 16 of driver Ud connects sound view
One end of relay JCX1 coil is controlled, sound is all connected with 5V electricity depending on the normally open end of control relay JCX1 and the other end of its coil
Source, the pin 5 that sound is separately connected the pin 16 of audio driver Ua1, single channel NOT gate Us1 depending on controlling the common end of relay JCX1
And the pin 10,11,12 and 30 of video driver Uvga1 and video driver Uvga2；The pin 15 of driver Ud connects electricity
The other end of one end of source cut-in relay JCX2 coil, plant-grid connection relay JCX2 coil connects 5V power supply, plant-grid connection
The common end and normally open end of relay JCX2 are separately connected the control terminal of projector power interface Jp220；The pin of driver Ud
13 base stages through resistance R2k connecting triode T1, the emitter of triode T1 connect 5V power supply, the collector connection of triode T1
The backlight electric power end of backlight socket JP11, resistance R1k connect between the collector and emitter of triode T1.
The beneficial effects of adopting the technical scheme are that
The middle control circuit of the utility model is used for classroom wall-hanging integrated machine system, is the control of classroom wall-hanging integrated machine system
Core supplies to break, avoids pressure drop using the 5V power supply of controllable sound view control relay control audio driver and video driver,
Selection market 5V power supply product in this way is not just problem；The controllable power supply of audio driver and video driver not only environmental protection but also can be with
Extend the service life of device.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
In figure, signal buffer Us2, sound are depending on controlling relay JCX1, plant-grid connection relay JCX2, driver Ud, reaching
Islington triode T1, backlight socket JP11, projector power interface Jp220, audio driver Ua1, single channel NOT gate Us1, video
Driver Uvga1, video driver Uvga2.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
As shown in Figure 1, the utility model discloses circuit is controlled in a kind of environmental protection power supply controllable multi-medium, including 5V power supply,
Master controller U0, signal buffer Us2, driver Ud, sound view control relay JCX1, plant-grid connection relay JCX2, projection
Electromechanical source interface Jp220, backlight socket JP11, audio driver Ua1 and video driving module；It is slow that 5V power supply is separately connected signal
Rush device Us2, driver Ud, sound view control relay JCX1 and plant-grid connection relay JCX2；Signal buffer Us2 has power supply
Control signal, equipment select input terminal, power supply control output end, audio frequency control output end, video control output end, and believe
Power supply control signal and equipment the selection input terminal of number buffer Us2 is separately connected the corresponding output end of master controller U0, letter
The audio frequency control output end of number buffer Us2 connects audio driver Ua1 control terminal, and the video control of signal buffer Us2 is defeated
Outlet connects the control terminal of video driving module, the input of the power supply control output end connection driver Ud of signal buffer Us2
End, three output ends of driver Ud are separately connected sound view control relay JCX1, plant-grid connection relay JCX2 and backlight control
The input terminal of device processed, sound are separately connected audio driver Ua1 and video driving module depending on controlling the output end of relay JCX1
DC supply input, the control terminal of output end connection projector's power interface Jp220 of plant-grid connection relay JCX2, backlight
The backlight electric power end of the output end connection backlight socket JP11 of controller.
The video driving module of the utility model includes video driver Uvga1, video driver Uvga2 and single channel NOT gate
Us1；The video control output end of signal buffer Us2 include control selections end and control enable end, control selections end respectively with
Video driver Uvga1 is connected with a control terminal of video driver Uvga2, control enable end respectively with single channel NOT gate Us1
Input terminal be connected with another control terminal of video driver Uvga1, the output end and video driver of single channel NOT gate Us1
Another control terminal of Uvga2 is connected.
The master controller U0 of the utility model uses single-chip microcontroller, the model 74hc244 of signal buffer Us2, driver
The model uln2003 of Ud, the model HK4100F of sound view control relay JCX1, the model of plant-grid connection relay JCX2
For SRD-05VDC-SL-C, backlight controller includes resistance R1k, R2k and Darlington triode T1, the type of audio driver Ua1
Number be 74hc4052, the model SN74AHC1G04DBVR of single channel NOT gate Us1；The pin 2,4 and 6 of signal buffer Us2 connects
It receives the power supply from master controller U0 and controls input signal pw_on, the pin 11 and 15 of signal buffer Us2 is received from total
The first equipment of controller U0 selects input signal sel1, and the pin 13 and 17 of signal buffer Us2 is received from master control
The second equipment of device U0 selects input signal sel2, the audio frequency control output signal that the pin 7 and 9 of signal buffer Us2 exports
It is separately connected the pin 9 and 10 of audio driver Ua1, the pin 5 of signal buffer Us2 is separately connected video driver Uvga1
With the pin 32 of video driver Uvga2, the pin 3 of signal buffer Us2 is separately connected the pin 2 and view of single channel NOT gate Us1
The pin 9 of frequency driver Uvga1, the pin 4 of single channel NOT gate Us1 connect the pin 9 of video driver Uvga2；Signal buffer
The power supply control output signal that the pin 14,16 and 18 of Us2 exports is separately connected the pin 4,2 and 1 of driver Ud；The 5V electricity
Source is separately connected the pin 20 of signal buffer Us2 and the pin 9 of driver Ud, and the pin 16 of driver Ud connects sound view control
One end of relay JCX1 coil, sound are all connected with 5V power supply depending on the normally open end of control relay JCX1 and the other end of its coil,
Sound depending on control relay JCX1 common end be separately connected the pin 16 of audio driver Ua1, single channel NOT gate Us1 pin 5 with
And the pin 10,11,12 and 30 of video driver Uvga1 and video driver Uvga2；The pin 15 of driver Ud connects power supply
One end of cut-in relay JCX2 coil, the other end of plant-grid connection relay JCX2 coil connect 5V power supply, plant-grid connection after
The common end and normally open end of electric appliance JCX2 are separately connected the control terminal of projector power interface Jp220；The pin 13 of driver Ud
Base stage through resistance R2k connecting triode T1, the emitter of triode T1 connect 5V power supply, and the collector of triode T1 connects back
The backlight electric power end of optical receptacle JP11, resistance R1k connect between the collector and emitter of triode T1.
Audio driver Ua1 is for controlling multipath audio signal selection switching；Backlight socket JP11 is for controlling liquid crystal
Show screen backlight；Video driver Uvga1 and video driver Uvga2 is used to complete four selections for selecting VGA signal all the way, single channel
NOT gate Us1 is used to carry out carry out state to VGA control chip selection signal to negate, to realize that 2 tunnels control signal realizes that VGA tetra- selects all
It changes.Sound is depending on control relay JCX1 for controlling audio driver Ua1, single channel NOT gate Us1, video driver Uvga1 and video
The 5V power supply of driver Uvga2 avoids pressure drop for breaking.When circuit works, sound view control relay JCX1 switch power supply is opened, it is non-
When working condition, sound view control relay JCX1 switch circuit breaking is closed, to control the work of video driver and audio driver
State realizes energy conservation, extends device lifetime.
The Pw_on signal of single-chip microcontroller output is inputted through the pin 2,4,6 of 74hc244, is exported through pin 18,16,14, respectively
The input pin 1,2,4 for inputting uln2003 is exported through pin 16,15,13；16 signal of the pin control sound view control of uln2003
Relay JCX1, the pin 3 of sound view control relay JCX1 controls the 5V power supply of audio driver, pin 4 controls video drive
The 5V of device circuit powers；The pin 15 of uln2003 controls plant-grid connection relay JCX2, realizes to projector's power interface
Jp220 power supply control；Pin 1 of the pin 13 of uln2003 through resistance R2k connecting triode T1, the pin 2 and 3 of triode T1
It powers after conducting to 5 feet of socket JP11, lights liquid crystal display backlight, after pulling down blackout, the pin 2 and 3 of triode T1
It can not be connected, socket JP11 disconnects power supply, and liquid crystal display backlight does not work.
Sel1 and sel2 signal is inputted by the pin 11,15 of 74hc244 and pin 13,17,74hc244 by pin 7,
9 and pin 3,5 export 2 tunnels control signal, pin 7 and 9 control audio driver, pin 3 and 5 control video driver.Pass through
1 signal is become 2 identical signals by signal buffer Us2, reduces control signal number, the 2 road signals converted point
Not Kong Zhi audio driver and video driver, realize synchronizing channel switching, improve signal control stability.
When middle control circuit is initially powered to self-test completion and then enters standby mode, sound has cut off sound depending on control relay JCX1
The 5V power supply of frequency driver Ua1 and video driver Uvga1；When lock swipes the card booting triggering, single-chip microcontroller issues instruction triggers
Booting computer, is closed projector's power control switch, and the normally opened contact closure of sound view control relay JCX1 starts as audio drive
Dynamic device Ua1 and video driver Uvga1 and Uvga2 provide 5V power supply；Audio-video is switched to dedicated tunnel, and adjustment audio volume arrives
Given time is arrived in preset value, delay, sends projector's power-on command, and power-on operation timing executes completion, into booting work shape
State, user begin to use equipment to work, and can execute device channels switching, volume plus-minus, mute control；When use terminates, press
Key after class sends projector's shutdown command into power-off operation state, sends and closes computer command, suspend mode audio frequency power amplifier part,
Delay waits projector heat radiation to complete, and cuts off the power, and the 5V power supply of audio driver, video driver is closed, into wait be switched on
State；The various states of LCD screen display operation process.
Claims (3)
1. controlling circuit in a kind of environmental protection power supply controllable multi-medium, it is characterised in that: slow including 5V power supply, master controller U0, signal
Rush device Us2, driver Ud, sound view control relay JCX1, plant-grid connection relay JCX2, projector power interface Jp220, back
Optical receptacle JP11, audio driver Ua1 and video driving module；The 5V power supply is separately connected signal buffer Us2, driver
Ud, sound view control relay JCX1 and plant-grid connection relay JCX2；The signal buffer Us2 has power supply control input
End, equipment select input terminal, power supply control output end, audio frequency control output end, video control output end, and signal buffer
Power supply control signal and equipment the selection input terminal of Us2 is separately connected the corresponding output end of master controller U0, signal buffer
The audio frequency control output end of Us2 connects audio driver Ua1 control terminal, the video control output end connection of signal buffer Us2
The control terminal of video driving module, the input terminal of the power supply control output end connection driver Ud of signal buffer Us2, driver
Three output ends of Ud are separately connected the input of sound view control relay JCX1, plant-grid connection relay JCX2 and backlight controller
End, sound are defeated depending on the DC power supply that the output end of control relay JCX1 is separately connected audio driver Ua1 and video driving module
Enter end, plant-grid connection relay JCX2 output end connection projector's power interface Jp220 control terminal, backlight controller it is defeated
The backlight electric power end of outlet connection backlight socket JP11.
2. controlling circuit in a kind of environmental protection power supply controllable multi-medium according to claim 1, it is characterised in that: the video drives
Dynamic model block includes video driver Uvga1, video driver Uvga2 and single channel NOT gate Us1；The video control of signal buffer Us2
Output end processed include control selections end and control enable end, control selections end respectively with video driver Uvga1 and video drive
A control terminal of device Uvga2 is connected, control enable end respectively with the input terminal and video driver Uvga1 of single channel NOT gate Us1
Another control terminal be connected, the output end of single channel NOT gate Us1 is connected with another control terminal of video driver Uvga2.
3. controlling circuit in a kind of environmental protection power supply controllable multi-medium according to claim 2, it is characterised in that: the master control
Device U0 uses single-chip microcontroller, the model uln2003 of the model 74hc244 of signal buffer Us2, driver Ud, sound view control
The model HK4100F of relay JCX1, the model SRD-05VDC-SL-C of plant-grid connection relay JCX2, backlight controller
Including resistance R1k, R2k and Darlington triode T1, the model 74hc4052 of audio driver Ua1, the type of single channel NOT gate Us1
Number be SN74AHC1G04DBVR；The pin 2,4 and 6 of the signal buffer Us2 receives the power supply control from master controller U0
It is defeated that the pin 11 and 15 of input signal pw_on processed, signal buffer Us2 receive the selection of the first equipment from master controller U0
Enter signal sel1, the pin 13 and 17 of signal buffer Us2 receives the selection input letter of the second equipment from master controller U0
The audio frequency control output signal that the pin 7 and 9 of number sel2, signal buffer Us2 export is separately connected drawing for audio driver Ua1
Foot 9 and 10, the pin 5 of signal buffer Us2 are separately connected the pin 32 of video driver Uvga1 and video driver Uvga2,
The pin 3 of signal buffer Us2 is separately connected the pin 2 of single channel NOT gate Us1 and the pin 9 of video driver Uvga1, and single channel is non-
The pin 4 of door Us1 connects the pin 9 of video driver Uvga2；The power supply that the pin 14,16 and 18 of signal buffer Us2 exports
Control output signal is separately connected the pin 4,2 and 1 of driver Ud；The 5V power supply is separately connected drawing for signal buffer Us2
The pin 9 of foot 20 and driver Ud, the pin 16 of driver Ud connect one end of sound view control relay JCX1 coil, sound view control
The normally open end of relay JCX1 processed and the other end of its coil are all connected with 5V power supply, the common end point of sound view control relay JCX1
It Lian Jie not the pin 16 of audio driver Ua1, the pin 5 of single channel NOT gate Us1 and video driver Uvga1 and video drive
The pin 10,11,12 and 30 of device Uvga2；The pin 15 of driver Ud connects one end of plant-grid connection relay JCX2 coil, electricity
The other end of source cut-in relay JCX2 coil connects 5V power supply, the common end of plant-grid connection relay JCX2 and normally open end difference
Connect the control terminal of projector's power interface Jp220；Base stage of the pin 13 of driver Ud through resistance R2k connecting triode T1,
The emitter of triode T1 connects 5V power supply, the backlight electric power end of the collector connection backlight socket JP11 of triode T1, resistance
R1k connects between the collector and emitter of triode T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145814.2U CN209433217U (en) | 2019-01-28 | 2019-01-28 | It is a kind of environmental protection power supply controllable multi-medium in control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145814.2U CN209433217U (en) | 2019-01-28 | 2019-01-28 | It is a kind of environmental protection power supply controllable multi-medium in control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209433217U true CN209433217U (en) | 2019-09-24 |
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ID=67977701
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920145814.2U Expired - Fee Related CN209433217U (en) | 2019-01-28 | 2019-01-28 | It is a kind of environmental protection power supply controllable multi-medium in control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN209433217U (en) |
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- 2019-01-28 CN CN201920145814.2U patent/CN209433217U/en not_active Expired - Fee Related
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Granted publication date: 20190924 |