CN203492144U - A simple photosensitive control circuit used for a video monitor - Google Patents
A simple photosensitive control circuit used for a video monitor Download PDFInfo
- Publication number
- CN203492144U CN203492144U CN201320578279.2U CN201320578279U CN203492144U CN 203492144 U CN203492144 U CN 203492144U CN 201320578279 U CN201320578279 U CN 201320578279U CN 203492144 U CN203492144 U CN 203492144U
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- resistance
- diode
- video monitor
- triode
- relay
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Abstract
The utility model discloses a simple photosensitive control circuit used for a video monitor. The simple photosensitive control circuit comprises a first resistor to a fourth resistor, a first diode, a second diode, a photosensitive triode, a relay, a control chip, a triode, and a capacitor. The control output end of the relay is connected with a power supply of a rotating motor of the video monitor in series. If no light is detected by the photosensitive triode, the video monitor is automatically controlled to operate or stop. Used in a video monitor, the simple photosensitive control circuit used for a video monitor has advantages of simple circuit structure, few elements, low cost, and a small external size, and has popularization and usage value.
Description
Technical field
The utility model relates to a kind of video monitor internal circuit, relates in particular to a kind of simple and easy photosensitive control circuit for video monitor.
Background technology
Video monitor is the important component part of safety and protection system, comprises front-end camera, transmission cable, video monitoring platform.Video camera can be divided into network digital camera and analog video camera, can be used as the collection of front end video signal.It is the integrated system that a kind of prevention ability is stronger.Video monitoring is directly perceived with it, accurately, in time and the information content abundant and be widely used in many occasions.In recent years, along with computer, network and image are processed, the develop rapidly of transmission technology, Video Supervision Technique has also had significant progress.And the structure for the photosensitive control circuit of video monitor inside is comparatively complicated in prior art, adopt element more, cost is high, volume is large, is inconvenient to install and use.
Utility model content
The purpose of this utility model provides a kind of simple and easy photosensitive control circuit for video monitor 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 the first resistance to the four resistance, the first diode, the second diode, phototriode, relay, control chip, triode and electric capacity, the collector electrode while of described phototriode and the positive source of described control chip, the first end of described the 4th resistance, the negative pole of described the second diode, the first end of described relay is connected with the first end of described electric capacity, the emitter of described phototriode is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the second resistance with the first end of described the 3rd resistance simultaneously, the second end of described the 3rd resistance is connected with the signal input part of described control chip, the second end of described the second resistance is connected with the negative pole of described control chip and the emitter of described triode simultaneously, the signal output part of described control chip is connected with the second end of described the 4th resistance with the negative pole of described the first diode simultaneously, the positive pole of described the first diode is connected with the base stage of described triode, the collector electrode while of described triode and the positive pole of described the second diode, the second end of described relay and the second end of described electric capacity are connected, the power supply of the control output end of described relay and weaving loom motor is connected in series.
The beneficial effects of the utility model are:
The utility model is a kind of simple and easy photosensitive control circuit for video monitor, is applied to have advantages of that circuit structure is simple, employing element is few, with low cost, external volume is little in video monitor, has the value of promoting and using.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises that the first resistance R 1 is to the 4th resistance R 4, the first diode D1, the second diode D2, phototriode VTG, relay J, control chip IC, triode VT and capacitor C, the collector electrode while of phototriode VTG and the positive source of control chip IC, the first end of the 4th resistance R 4, the negative pole of the second diode D2, the first end of relay J is connected with the first end of capacitor C, the emitter of phototriode VTG is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 is connected with the first end of the second resistance R 2 with the first end of the 3rd resistance R 3 simultaneously, the second end of the 3rd resistance R 3 is connected with the signal input part of control chip IC, the second end of the second resistance R 2 is connected with the emitter of triode VT with the negative pole of control chip IC simultaneously, the signal output part of control chip IC is connected with the second end of the 4th resistance R 4 with the negative pole of the first diode D1 simultaneously, the positive pole of the first diode D1 is connected with the base stage of triode VT, the collector electrode while of triode VT and the positive pole of the second diode D2, the second end of relay J and the second end of capacitor C are connected, the power supply of the control output end of relay J and video monitor electric rotating machine is connected in series.When phototriode VTG monitors while there is no light, automatically control the work of video monitor and stop.
Claims (1)
1. the simple and easy photosensitive control circuit for video monitor, it is characterized in that: comprise the first resistance to the four resistance, the first diode, the second diode, phototriode, relay, control chip, triode and electric capacity, the collector electrode while of described phototriode and the positive source of described control chip, the first end of described the 4th resistance, the negative pole of described the second diode, the first end of described relay is connected with the first end of described electric capacity, the emitter of described phototriode is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the second resistance with the first end of described the 3rd resistance simultaneously, the second end of described the 3rd resistance is connected with the signal input part of described control chip, the second end of described the second resistance is connected with the negative pole of described control chip and the emitter of described triode simultaneously, the signal output part of described control chip is connected with the second end of described the 4th resistance with the negative pole of described the first diode simultaneously, the positive pole of described the first diode is connected with the base stage of described triode, the collector electrode while of described triode and the positive pole of described the second diode, the second end of described relay and the second end of described electric capacity are connected, the power supply of the control output end of described relay and weaving loom motor is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578279.2U CN203492144U (en) | 2013-09-17 | 2013-09-17 | A simple photosensitive control circuit used for a video monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578279.2U CN203492144U (en) | 2013-09-17 | 2013-09-17 | A simple photosensitive control circuit used for a video monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203492144U true CN203492144U (en) | 2014-03-19 |
Family
ID=50262939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320578279.2U Expired - Fee Related CN203492144U (en) | 2013-09-17 | 2013-09-17 | A simple photosensitive control circuit used for a video monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203492144U (en) |
-
2013
- 2013-09-17 CN CN201320578279.2U patent/CN203492144U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |