CN205302269U - Computer cooling fan detection circuitry - Google Patents
Computer cooling fan detection circuitry Download PDFInfo
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- CN205302269U CN205302269U CN201620014780.XU CN201620014780U CN205302269U CN 205302269 U CN205302269 U CN 205302269U CN 201620014780 U CN201620014780 U CN 201620014780U CN 205302269 U CN205302269 U CN 205302269U
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- resistance
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- emitting diode
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Abstract
The utility model provides a computer cooling fan detection circuitry when overtension or high temperature, reminds the user in time to maintain. Its scheme is, including thermistor RT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, operational amplifier U3, logical AND gate U4, field effect transistor Q1, emitting diode D1, emitting diode D2, buzzer BUZ1, buzzer BUZ2, NPN type triode Q2 and radiator fan motor M. The utility model discloses simple structure, used components and parts are few, and are with low costs, when the overtension, the smooth and buzzer BUZ2 warning of emitting diode D1 jaundice, but user reduced voltage, when the temperature risees, the rising of comparator U1's non inverting input terminal voltage, emitting diode D2 turns red solely and the warning of buzzer BUZ1, logical AND gate U4 output high level of while, drive radiator fan motor M, radiator fan opens and dispels the heat, lengthens the life of computer.
Description
Technical field
This utility model relates to radiator fan detection technique field, particularly a kind of computer radiating fan testing circuit.
Background technology
Computer is pervasive to the various aspects of people's life, almost all trades and professions all can use computer, the use of computer can be accompanied by, computer occurs in that various fault is also seen everywhere, wherein dispelling the heat bad is the one of the main reasons causing computer to break down, CPU can generate heat in computer running, if dispelled the heat not in time, CPU is burnt out along with thermal accumlation causes, and cpu fan has heat sensor, when temperature reaches a certain setting regions, fan regulates rotating speed by heat sensor, cpu temperature is made to be maintained at reasonable interval, but computer is when overclocking amplitude, voltage is crossed small computer and be there will be the unknown failures such as BSOD, if computer is too high, caloric value is excessive, cpu temperature is too high, and the 5000 turns/min of rotating speed of radiator fan, the rotating speed of such radiator fan is abnormal, overtension, radiating fan rotation speed does not reach, it is unfavorable for heat radiation, cause computer shortening in service life.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the purpose of this utility model is in that to provide a kind of computer radiating fan testing circuit, when overtension or temperature are too high, reminds user to safeguard in time.
The technical scheme of its solution is, including thermal resistor RT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, operational amplifier U3, logical AND gate U4, field effect transistor Q1, light emitting diode D1, light emitting diode D2, buzzer BUZ1, buzzer BUZ2, NPN type triode Q2 and radiator fan motor M, one end of described thermal resistor RT1 is connected with one end of resistance R1, another termination power VCC of resistance R1, the other end ground connection GND of thermal resistor RT1, one end of thermal resistor RT1 is connected with the in-phase input end of comparator U1, the anti-phase input termination reference voltage V ref of comparator U1, the inverting input of comparator U1 is connected with one end of resistance R2, the other end of resistance R2 is connected with the drain electrode of field effect transistor Q1, the source ground GND of field effect transistor Q1, the grid of field effect transistor Q1 is connected with the outfan of comparator U1, 11 pins of comparator U1 meet power supply VCC, the 4 pin ground connection GND of comparator U1, the outfan of comparator U1 is connected with the positive pole of light emitting diode D2, the negative pole of light emitting diode D2 is connected with one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the outfan of comparator BUZ1 is connected with an input of logical AND gate U4, the outfan of logical AND gate U4 is connected with the base stage of NPN type triode Q2, the colelctor electrode of NPN type triode Q2 meets power supply VCC, the emitter stage of NPN type triode Q2 is through radiator fan motor M ground connection GND, another input of logical AND gate U4 is connected with the outfan of operational amplifier U3, the outfan of operational amplifier U3 is connected with the positive pole of light emitting diode D1, the negative pole of light emitting diode D1 is connected with one end of buzzer BUZ2, the other end ground connection GND of buzzer BUZ2, the inverting input of operational amplifier U3 is through resistance R9 ground connection GND, the 4 pin ground connection GND of operational amplifier U3, 11 pins of operational amplifier U3 meet power supply VCC, the in-phase input end of operational amplifier U3 is connected with one end of resistance R8, the other end of resistance R8 is connected with the outfan of comparator U2, the outfan of comparator U2 is connected with one end of resistance R7, the other end of resistance R7 is connected with the in-phase input end of comparator U2, one end ground connection GND of the in-phase input end of comparator U2 and electric capacity C1, the other end ground connection GND of electric capacity C1, the in-phase input end of comparator U2 is connected with one end of resistance R5, the other end of resistance R5 is connected with one end of resistance R4, the other end ground connection GND of resistance R4, the other end of resistance R5 is connected with one end of resistance R3, the other end of resistance R3 is connected with the positive pole of voltage U, the inverting input of comparator U2 is through resistance R6 ground connection GND, 11 pins of comparator U2 meet power supply VCC, the 4 pin ground connection GND of comparator U2.
This utility model simple in construction, components and parts used are few, and cost is low, when overtension, light emitting diode D1 Yellow light-emitting low temperature and buzzer BUZ2 report to the police, and user can reduce voltage, when the temperature increases, the in-phase input end voltage of comparator U1 raises, light emitting diode D2 glows and buzzer BUZ1 reports to the police, and logical AND gate U4 exports high level simultaneously, drives radiator fan motor M, radiator fan is opened and is dispelled the heat, and extends the service life of computer.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of computer radiating fan testing circuit of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Shown in Fig. 1, a kind of computer radiating fan testing circuit of the present utility model, including thermal resistor RT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, operational amplifier U3, logical AND gate U4, field effect transistor Q1, light emitting diode D1, light emitting diode D2, buzzer BUZ1, buzzer BUZ2, NPN type triode Q2 and radiator fan motor M, one end of described thermal resistor RT1 is connected with one end of resistance R1, another termination power VCC of resistance R1, the other end ground connection GND of thermal resistor RT1, one end of thermal resistor RT1 is connected with the in-phase input end of comparator U1, the anti-phase input termination reference voltage V ref of comparator U1, the inverting input of comparator U1 is connected with one end of resistance R2, the other end of resistance R2 is connected with the drain electrode of field effect transistor Q1, the source ground GND of field effect transistor Q1, the grid of field effect transistor Q1 is connected with the outfan of comparator U1, 11 pins of comparator U1 meet power supply VCC, the 4 pin ground connection GND of comparator U1, the outfan of comparator U1 is connected with the positive pole of light emitting diode D2, the negative pole of light emitting diode D2 is connected with one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the outfan of comparator BUZ1 is connected with an input of logical AND gate U4, the outfan of logical AND gate U4 is connected with the base stage of NPN type triode Q2, the colelctor electrode of NPN type triode Q2 meets power supply VCC, the emitter stage of NPN type triode Q2 is through radiator fan motor M ground connection GND, another input of logical AND gate U4 is connected with the outfan of operational amplifier U3, the outfan of operational amplifier U3 is connected with the positive pole of light emitting diode D1, the negative pole of light emitting diode D1 is connected with one end of buzzer BUZ2, the other end ground connection GND of buzzer BUZ2, the inverting input of operational amplifier U3 is through resistance R9 ground connection GND, the 4 pin ground connection GND of operational amplifier U3, 11 pins of operational amplifier U3 meet power supply VCC, the in-phase input end of operational amplifier U3 is connected with one end of resistance R8, the other end of resistance R8 is connected with the outfan of comparator U2, the outfan of comparator U2 is connected with one end of resistance R7, the other end of resistance R7 is connected with the in-phase input end of comparator U2, one end ground connection GND of the in-phase input end of comparator U2 and electric capacity C1, the other end ground connection GND of electric capacity C1, the in-phase input end of comparator U2 is connected with one end of resistance R5, the other end of resistance R5 is connected with one end of resistance R4, the other end ground connection GND of resistance R4, the other end of resistance R5 is connected with one end of resistance R3, the other end of resistance R3 is connected with the positive pole of voltage U, the inverting input of comparator U2 is through resistance R6 ground connection GND, 11 pins of comparator U2 meet power supply VCC, the 4 pin ground connection GND of comparator U2.
Described thermal resistor RT1 is negative temperature coefficient thermistor NTC, when temperature is more high, resistance value is more low, rising along with temperature, the resistance value of thermal resistor RT1 reduces, and the voltage at resistance R1 two ends raises, and namely the voltage of the in-phase input end of input comparator U1 raises, now, the outfan output high level of comparator U1.
This utility model is in use, temperature raises, the outfan output high level of comparator U1, overtension, operational amplifier U3 exports high level, the outfan of comparator U1 or the outfan of operational amplifier U3 have at least an output high level, logical AND gate U4 exports high level, and the high level of logical AND gate U4 output, after NPN type triode Q2 amplifies, drives radiator fan motor M, start radiator fan, strengthen heat-sinking capability.
When temperature raises, the resistance value of thermal resistor RT1 declines, the voltage at resistance R1 two ends raises, and the voltage of the in-phase input end of input comparator U1 raises, and the outfan of comparator U1 is high level, now light emitting diode D2 glows, and buzzer BUZ1 reports to the police, remind user's temperature too high, can take measures to make temperature reduce, safeguard computer, extend the service life of computer;
During overtension; the voltage of the in-phase input end of input comparator U2 raises; the output end voltage of comparator U2 also raises simultaneously, after operational amplifier U3 amplifies, provides electric energy for light emitting diode D1 and buzzer BUZ2; light emitting diode D1 Yellow light-emitting low temperature; buzzer BUZ2 reports to the police, and user can reduce voltage, makes the rotating speed of radiator fan maintain normal reasonably interval; protection CPU, extends the service life of computer.
This utility model simple in construction, components and parts used are few, and cost is low, when overtension, light emitting diode D1 Yellow light-emitting low temperature and buzzer BUZ2 report to the police, and user can reduce voltage, when the temperature increases, the in-phase input end voltage of comparator U1 raises, light emitting diode D2 glows and buzzer BUZ1 reports to the police, and logical AND gate U4 exports high level simultaneously, drives radiator fan motor M, radiator fan is opened and is dispelled the heat, and extends the service life of computer.
Claims (1)
1. a computer radiating fan testing circuit, it is characterized in that, including thermal resistor RT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, operational amplifier U3, logical AND gate U4, field effect transistor Q1, light emitting diode D1, light emitting diode D2, buzzer BUZ1, buzzer BUZ2, NPN type triode Q2 and radiator fan motor M, one end of described thermal resistor RT1 is connected with one end of resistance R1, another termination power VCC of resistance R1, the other end ground connection GND of thermal resistor RT1, one end of thermal resistor RT1 is connected with the in-phase input end of comparator U1, the anti-phase input termination reference voltage V ref of comparator U1, the inverting input of comparator U1 is connected with one end of resistance R2, the other end of resistance R2 is connected with the drain electrode of field effect transistor Q1, the source ground GND of field effect transistor Q1, the grid of field effect transistor Q1 is connected with the outfan of comparator U1, 11 pins of comparator U1 meet power supply VCC, the 4 pin ground connection GND of comparator U1, the outfan of comparator U1 is connected with the positive pole of light emitting diode D2, the negative pole of light emitting diode D2 is connected with one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the outfan of comparator BUZ1 is connected with an input of logical AND gate U4, the outfan of logical AND gate U4 is connected with the base stage of NPN type triode Q2, the colelctor electrode of NPN type triode Q2 meets power supply VCC, the emitter stage of NPN type triode Q2 is through radiator fan motor M ground connection GND, another input of logical AND gate U4 is connected with the outfan of operational amplifier U3, the outfan of operational amplifier U3 is connected with the positive pole of light emitting diode D1, the negative pole of light emitting diode D1 is connected with one end of buzzer BUZ2, the other end ground connection GND of buzzer BUZ2, the inverting input of operational amplifier U3 is through resistance R9 ground connection GND, the 4 pin ground connection GND of operational amplifier U3, 11 pins of operational amplifier U3 meet power supply VCC, the in-phase input end of operational amplifier U3 is connected with one end of resistance R8, the other end of resistance R8 is connected with the outfan of comparator U2, the outfan of comparator U2 is connected with one end of resistance R7, the other end of resistance R7 is connected with the in-phase input end of comparator U2, one end ground connection GND of the in-phase input end of comparator U2 and electric capacity C1, the other end ground connection GND of electric capacity C1, the in-phase input end of comparator U2 is connected with one end of resistance R5, the other end of resistance R5 is connected with one end of resistance R4, the other end ground connection GND of resistance R4, the other end of resistance R5 is connected with one end of resistance R3, the other end of resistance R3 is connected with the positive pole of voltage U, the inverting input of comparator U2 is through resistance R6 ground connection GND, 11 pins of comparator U2 meet power supply VCC, the 4 pin ground connection GND of comparator U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620014780.XU CN205302269U (en) | 2016-01-08 | 2016-01-08 | Computer cooling fan detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620014780.XU CN205302269U (en) | 2016-01-08 | 2016-01-08 | Computer cooling fan detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205302269U true CN205302269U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620014780.XU Expired - Fee Related CN205302269U (en) | 2016-01-08 | 2016-01-08 | Computer cooling fan detection circuitry |
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| Country | Link |
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| CN (1) | CN205302269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959801A (en) * | 2017-12-22 | 2019-07-02 | 上海卓思智能科技股份有限公司 | NTC detection circuit and wind speed measuring sensor for wind speed measurement |
-
2016
- 2016-01-08 CN CN201620014780.XU patent/CN205302269U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959801A (en) * | 2017-12-22 | 2019-07-02 | 上海卓思智能科技股份有限公司 | NTC detection circuit and wind speed measuring sensor for wind speed measurement |
| CN109959801B (en) * | 2017-12-22 | 2023-09-19 | 上海卓思智能科技股份有限公司 | NTC detection circuit for wind speed detection and wind speed measurement sensor |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20190108 |