CN205356289U - Time delay automatic shutdown security circuit - Google Patents
Time delay automatic shutdown security circuit Download PDFInfo
- Publication number
- CN205356289U CN205356289U CN201620103604.3U CN201620103604U CN205356289U CN 205356289 U CN205356289 U CN 205356289U CN 201620103604 U CN201620103604 U CN 201620103604U CN 205356289 U CN205356289 U CN 205356289U
- Authority
- CN
- China
- Prior art keywords
- resistance
- audion
- model
- amplifier
- time delay
- 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.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a time delay automatic shutdown security circuit, the electric elements who uses in the specific circuit structure design includes the switch, power amplifier, electric capacity, first, second triode, first, second diode and first to the 5th resistance. The utility model discloses a simple circuit design can realize the automatic shutdown that delays, and circuit structure is simple, low cost, uses the scene abundant, and the security is high.
Description
Technical field
The utility model discloses a kind of time delay automatic shutdown security circuit, relate to technical field.
Background technology
When relating to the higher ranked working environment of the security requirements such as financial transaction, various equipment and the instrument especially electronic tool such as computer, computer is the importance leaving over potential safety hazard, when staff leave or long-time not near equipment time, there is the danger that the information such as financial secure content are spied on by others.
Existing delay switching-off function great majority pass through software control realization, and the use of software equally exists hacker's equivalent risk.Prior art lacks a kind of method that can realize time delay automatic shutdown by simple circuit design.
Utility model content
Technical problem to be solved in the utility model is: for the defect of prior art, it is provided that a kind of time delay automatic shutdown security circuit.
This utility model is for solving above-mentioned technical problem by the following technical solutions:
A kind of time delay automatic shutdown security circuit, including switch, power supply, amplifier, electric capacity, first, second audion, first, second diode and the first to the 5th resistance, wherein,
The first input end of described positive source connecting valve, power cathode respectively with one end of electric capacity, one end of first resistance, one end of second resistance, the lower pull end of amplifier, the negative pole of the first diode is connected, the other end of electric capacity is connected with the second input of switch, switch the first outfan respectively with the other end of the first resistance, the positive input terminal of amplifier, the positive pole of the second diode is connected, the negative pole of the second diode respectively with the colelctor electrode of the second audion, the upper pull end of amplifier is connected and as the outfan of whole time delay automatic shutdown security circuit, switch the second outfan respectively with one end of the 5th resistance, the emitter stage of the second audion is connected, the other end of the 5th resistance respectively with the negative input end of amplifier, the other end of the second resistance is connected, the outfan of amplifier base stage with the first audion after the 3rd resistance is connected, the colelctor electrode of the first audion is connected through the base stage of the 4th resistance and the second audion, the emitter stage of the first audion and the positive pole of the first diode are connected.
As of the present utility model it is preferred that scheme, the model of described first, second audion respectively 8050 and 8550.
As of the present utility model it is preferred that scheme, the model of described amplifier is TL061.
As of the present utility model it is preferred that scheme, the model of described first, second diode is 1N4148.
As of the present utility model it is preferred that scheme, described power supply is 9V battery.
This utility model adopts above technical scheme compared with prior art, has following technical effect that this utility model can realize time delay automatic shutdown by simple circuit design, and circuit structure is simple, with low cost, uses scene to enrich, and safety is high.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present utility model；
Wherein: S1 is switch, and BT1 is power supply, and A1 is amplifier, and C1 is electric capacity, Q1, Q2 respectively first, second audion, D1, D2 respectively first, second diode, and R1 to R5 is the first to the 5th resistance respectively.
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining this utility model, and can not be construed to restriction of the present utility model.
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:
Circuit connection diagram of the present utility model is as it is shown in figure 1, a kind of time delay automatic shutdown security circuit, including switch, power supply, amplifier, electric capacity, first, second audion, first, second diode and the first to the 5th resistance, wherein,
The first input end of described positive source connecting valve, power cathode respectively with one end of electric capacity, one end of first resistance, one end of second resistance, the lower pull end of amplifier, the negative pole of the first diode is connected, the other end of electric capacity is connected with the second input of switch, switch the first outfan respectively with the other end of the first resistance, the positive input terminal of amplifier, the positive pole of the second diode is connected, the negative pole of the second diode respectively with the colelctor electrode of the second audion, the upper pull end of amplifier is connected and as the outfan of whole time delay automatic shutdown security circuit, switch the second outfan respectively with one end of the 5th resistance, the emitter stage of the second audion is connected, the other end of the 5th resistance respectively with the negative input end of amplifier, the other end of the second resistance is connected, the outfan of amplifier base stage with the first audion after the 3rd resistance is connected, the colelctor electrode of the first audion is connected through the base stage of the 4th resistance and the second audion, the emitter stage of the first audion and the positive pole of the first diode are connected.
As of the present utility model it is preferred that scheme, the model of described first, second audion respectively 8050 and 8550.
As of the present utility model it is preferred that scheme, the model of described amplifier is TL061.
As of the present utility model it is preferred that scheme, the model of described first, second diode is 1N4148.
As of the present utility model it is preferred that scheme, described power supply is 9V battery.
In a specific embodiment of the present utility model, R1 and C1 forms RC timing network, and Q1 and Q2 forms electrical switch.Its work process is: when switch S1 is placed in "Off", electric capacity C1 is charged by 9V battery.Make the voltage at C1 two ends equal to cell voltage.When S1 is placed in "ON", electric capacity C1 is connected to the in-phase input end (A) of amplifier, discharges simultaneously also by R1.R2 and R5 dividing potential drop obtains the voltage of about 1.5V and adds to the inverting input (B) of amplifier, just voltage A during start " B, amplifier output high level.This says that use Q1 and Q2 turns on, and exports 9V voltage by the colelctor electrode of Q2, the subsequent conditioning circuit work that circuit output end connects.Along with the continuous electric discharge of C1, the voltage of A constantly declines, and when A terminal voltage is less than B terminal voltage, amplifier output low level, Q2 output low level, circuit output end outfan running voltage is not enough, and subsequent conditioning circuit does not work.
The time of timing, it is dependent on R1 and C1.Its relation is: t=-ln(A/U) RC, and its electricity U is the initial voltage of electric capacity, and A is final voltage.The value of above circuit is about 14 minutes, is about half an hour when electric capacity is changed into 100uF.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, it is also possible to make a variety of changes under the premise without departing from this utility model objective.The above, it it is only preferred embodiment of the present utility model, not this utility model is done any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but it is not limited to this utility model, any those skilled in the art, without departing within the scope of technical solutions of the utility model, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solutions of the utility model content, according to technical spirit of the present utility model, within spirit of the present utility model and principle, the any simple amendment that above example is made, equivalent replacement and improvement etc., all still fall within the protection domain of technical solutions of the utility model.
Claims (5)
1. a time delay automatic shutdown security circuit, it is characterised in that: include switch, power supply, amplifier, electric capacity, first, second audion, first, second diode and the first to the 5th resistance, wherein,
The first input end of described positive source connecting valve, power cathode respectively with one end of electric capacity, one end of first resistance, one end of second resistance, the lower pull end of amplifier, the negative pole of the first diode is connected, the other end of electric capacity is connected with the second input of switch, switch the first outfan respectively with the other end of the first resistance, the positive input terminal of amplifier, the positive pole of the second diode is connected, the negative pole of the second diode respectively with the colelctor electrode of the second audion, the upper pull end of amplifier is connected and as the outfan of whole time delay automatic shutdown security circuit, switch the second outfan respectively with one end of the 5th resistance, the emitter stage of the second audion is connected, the other end of the 5th resistance respectively with the negative input end of amplifier, the other end of the second resistance is connected, the outfan of amplifier base stage with the first audion after the 3rd resistance is connected, the colelctor electrode of the first audion is connected through the base stage of the 4th resistance and the second audion, the emitter stage of the first audion and the positive pole of the first diode are connected.
2. time delay automatic shutdown security circuit as claimed in claim 1 a kind of, it is characterised in that: the model of described first, second audion respectively 8050 and 8550.
3. a kind of time delay automatic shutdown security circuit as claimed in claim 1, it is characterised in that: the model of described amplifier is TL061.
4. a kind of time delay automatic shutdown security circuit as claimed in claim 1, it is characterised in that: the model of described first, second diode is 1N4148.
5. a kind of time delay automatic shutdown security circuit as claimed in claim 1, it is characterised in that: described power supply is 9V battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620103604.3U CN205356289U (en) | 2016-02-02 | 2016-02-02 | Time delay automatic shutdown security circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620103604.3U CN205356289U (en) | 2016-02-02 | 2016-02-02 | Time delay automatic shutdown security circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205356289U true CN205356289U (en) | 2016-06-29 |
Family
ID=56182304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620103604.3U Expired - Fee Related CN205356289U (en) | 2016-02-02 | 2016-02-02 | Time delay automatic shutdown security circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205356289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994891A (en) * | 2017-11-16 | 2018-05-04 | 北京奇虎科技有限公司 | A kind of time-delay shutdown circuit and electronic equipment |
-
2016
- 2016-02-02 CN CN201620103604.3U patent/CN205356289U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994891A (en) * | 2017-11-16 | 2018-05-04 | 北京奇虎科技有限公司 | A kind of time-delay shutdown circuit and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207926438U (en) | DC power supply | |
| CN101546216A (en) | Reset circuit | |
| CN205356289U (en) | Time delay automatic shutdown security circuit | |
| CN207354224U (en) | Power amplification circuit for speaker of voice box | |
| CN202652065U (en) | Delayed supply circuit of high voltage and low voltage power supplies | |
| CN205594573U (en) | Computer constant voltage power supply controller | |
| CN203813750U (en) | Low-cost time-delay circuit for double-power-supply sequential power-on | |
| CN207473455U (en) | A kind of voltage clamp circuit | |
| CN107465257B (en) | Automatic switching circuit for main power supply and standby power supply | |
| CN202455057U (en) | Power supply protecting circuit | |
| CN204302846U (en) | Tandem type constant current adjustable voltage-stabilized source | |
| CN202197099U (en) | Lithium battery charging protection chip | |
| CN209345120U (en) | A kind of RC charge-discharge circuit of repid discharge | |
| CN202798970U (en) | HDMI (high-definition multimedia interface) device | |
| CN203502529U (en) | Switching on/of judging circuit of electric leakage reclosure breaker | |
| CN104836316A (en) | Current-adjustable constant current charging circuit | |
| CN204681147U (en) | A kind of constant-current charging circuit of adjustable current | |
| CN205080676U (en) | Electronic circuit high pressure warning protection circuit | |
| CN205622610U (en) | Low level control's delay circuit | |
| CN204794042U (en) | Overvoltage crowbar of lithium cell constant current quick charge | |
| CN104779653A (en) | Charging indicating circuit | |
| CN211089113U (en) | Power supply overvoltage protection circuit | |
| CN219779980U (en) | Switching power supply voltage delay control circuit | |
| CN211348377U (en) | Electric parameter measuring instrument | |
| CN208028163U (en) | A kind of automatic aging cabinet for producing cylindrical battery or capacitance |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20170202 |