CN1952838B - Overheat indicating circuit for mainboard - Google Patents
Overheat indicating circuit for mainboard Download PDFInfo
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- CN1952838B CN1952838B CN2005101005785A CN200510100578A CN1952838B CN 1952838 B CN1952838 B CN 1952838B CN 2005101005785 A CN2005101005785 A CN 2005101005785A CN 200510100578 A CN200510100578 A CN 200510100578A CN 1952838 B CN1952838 B CN 1952838B
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- mainboard
- light emitting
- emitting diode
- indicating circuit
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Abstract
This invention relates to main board overheat indication circuit, which comprises one function chip and one temperature control chip connected with function chip, wherein, the said main board also comprises one switch circuit and one light diode; the said switch circuit input end connects the said temperature control chip to receive one impose signals; the said switch circuit output end is connected with one first high level and its light diode cathode; the said light diode anode is connected to one second high level.
Description
[technical field]
The invention relates to a kind of indicating circuit, refer to a kind of indicating circuit that causes computer glitch because of mainboard is overheated of indicating especially.
[background technology]
Computer in use occur to crash through regular meeting, and mostly the performance during deadlock is the display blue screen, can't start-up system, and video freezing is reactionless, and mouse, keyboard can't be imported, and the improper interruptions of running software etc. make the operator rather worried.The reason that causes computer occur to crash has a lot, as dispel the heat bad, equipment does not match, hard disk failure, virus infections, system file are corrupted or deleted, illegal operation or the like.When crashing appearred in computer, it was that which kind of reason causes that the user can not determine the end usually, and the phenomenon that causes crashing frequently takes place, and but can not in time make corresponding counter-measure to different deadlock reasons, to improve the operation conditions of computer.
Along with making rapid progress of computer technology development; Present computer operation speed is highly improved, and correspondingly, the inner heat that is produced of computer is also far above the past; If the cooling system of computer can not in time distribute heat, will cause computer crash even shutdown automatically.At this moment, if do not have clear and definite indication explanation to crash or the shutdown phenomenon is overheated and cause by computer main board, the user just can only handle according to the program of habitually practising, and successively possible reason is got rid of.This has not only wasted user's quality time, also brings unnecessary trouble for processing procedure.
[summary of the invention]
In view of above content, be necessary to provide a kind of overheated indicating circuit that causes computer glitch of mainboard of indicating.
A kind of overheat indicating circuit for mainboard; It comprises that a functional chip and that is arranged on the mainboard is connected to the temperature control chip of said functional chip; Said overheat indicating circuit for mainboard also comprises an on-off circuit and a light emitting diode; The input end of said on-off circuit is connected to said temperature control chip and from wherein receiving a pulse signal; The output terminal of said on-off circuit is connected in the negative electrode of one first high level and said light emitting diode simultaneously, and the anode of said light emitting diode is connected in one second high level.
Preferably; Said overheat indicating circuit for mainboard also comprises a connector; Said connector comprises one first pin and one second pin, and said first pin is connected to said first high level, and said second pin is connected to the output terminal and said second high level of said on-off circuit simultaneously.
Preferably, the anode of said light emitting diode is connected to first pin of said connector, and the negative electrode of said light emitting diode is connected to second pin of said connector.
Preferably, said on-off circuit comprises a positive-negative-positive triode, and the output terminal of said temperature control chip is connected to the base stage of said positive-negative-positive triode, the grounded emitter of said positive-negative-positive triode, and collector is connected to the negative electrode of said light emitting diode.
Preferably, said on-off circuit comprises that also one is series at first resistance between said temperature control chip output terminal and the said positive-negative-positive transistor base.
Preferably; Said on-off circuit comprises a P-channel enhancement type FET; The output terminal of said temperature control chip is connected to the grid of said P-channel enhancement type FET, and the grounded drain of said P-channel enhancement type FET, source electrode are connected to the negative electrode of said light emitting diode.
Preferably, be provided with one second resistance between the output terminal of said on-off circuit and said first high level, be provided with one the 3rd resistance between the anode of said light emitting diode and said second high level.
Preferably, when the temperature of said functional chip exceeded the temperature of computer system setting, the output terminal of said temperature control chip produced said pulse signal.
Compared to prior art; Overheat indicating circuit for mainboard of the present invention has increased by a control light emitting diode and has replaced luminous on-off circuit; When overtemperature shutdown appears in system; Said temperature control chip is controlled said on-off circuit and is broken off or conducting, extinguishes or lights thereby control this light emitting diode, to remind the user computer guilty culprit.
[description of drawings]
Combine embodiment that the present invention is done further description with reference to the accompanying drawings.
Fig. 1 is the principle of work block scheme of overheat indicating circuit for mainboard preferred embodiment of the present invention.
Fig. 2 is the physical circuit figure of on-off circuit among Fig. 1.
Fig. 3 is the CC figure of connector and light emitting diode among Fig. 1.
Fig. 4 is the physical circuit figure of another preferred embodiment of on-off circuit among Fig. 1.
[embodiment]
See also Fig. 1 to Fig. 3; The preferred embodiment of overheat indicating circuit for mainboard of the present invention comprises central processing unit (CPU) chip of being located on the mainboard 10; The light emitting diode (LED) 60 that one monitoring temperature chip 20, one on-off circuits, 30, one connectors 50 and are connected on this connector 50.
Said temperature control chip 20 is connected in the temperature control pin of said cpu chip 10; When the temperature of CPU exceeds the ultimate temperature of default; Crashing or the situation of shutting down automatically appears in computer system, and this moment, cpu chip 10 issued a signal transmitted to said temperature control chip 20.Said temperature control chip 20 receives the input end that promptly produces a pulse signal by pin PWRLED behind this signal and be sent to said on-off circuit 30.
Said on-off circuit 30 comprises a switching device 31; First preferred embodiment of said switching device 31 is a positive-negative-positive triode; Be connected one first resistance R 1 between the input end of the base stage of said triode 31 and said on-off circuit 30; The grounded emitter of said triode 31, collector is connected to one+5V power supply through one second resistance R 2, and is connected in the pin 4 of said connector 50 simultaneously.
The pin two of said connector 50 is connected to one+5V power supply through one second resistance R 2, and the anode of said light emitting diode 60 is connected to said pin two, and negative electrode is connected to the pin 4 of said connector 50.
In the present embodiment, said connector 50 is that said for ease light emitting diode 60 is connected with computer main board and is provided with.The anode of said light emitting diode 60 can directly be connected to said+5V power supply through said the 3rd resistance R 3, and negative electrode can be directly connected in the output terminal of said on-off circuit 30, the collector of promptly said positive-negative-positive triode 31.
When the temperature of CPU exceeds the ultimate temperature of default; Said temperature control chip 20 sends the alternately input end of pulse signal to the said on-off circuit 30 of appearance of a high-low level; When said pulse signal was high level, said positive-negative-positive triode 31 ended, this moment said diode 60 anode and negative electrode all with+5V high level connection; Therefore said diode ends, and is not luminous; When said pulse signal was low level, the pin 4 of connector was also sent into this low level in said positive-negative-positive triode 31 conductings, and the negative electrode of promptly said diode 60 is luminous because of producing a forward voltage drop conducting between the anode of said diode 60 and negative electrode at this moment.The high-low level that said temperature control chip 20 produces alternately occurs, and therefore said diode 60 also produces the luminescence phenomenon alternately that flickers, and is by the overheated initiation of mainboard thereby remind user's computer glitch.
Fig. 4 is second preferred embodiment of said on-off circuit; The difference of itself and first preferred embodiment is: said switching device 31 ' is a P-channel enhancement type FET; The grid of said FET 31 ' is connected to the output terminal of said temperature control chip 20; The grounded drain of said FET 31 ', source electrode is connected to one+5V power supply through one second resistance R 2, and is connected in the pin 4 of said connector 50.Its principle of work is identical with first preferred embodiment.
Wherein, in the foregoing description, said cpu chip 10 can be other chip with similar functions.
Claims (8)
1. overheat indicating circuit for mainboard; It comprises that a functional chip and that is arranged on the mainboard is connected to the temperature control chip of said functional chip; It is characterized in that: said overheat indicating circuit for mainboard also comprises an on-off circuit and a light emitting diode; The input end of said on-off circuit is connected to said temperature control chip and replaces the pulse signal that occurs from wherein receiving a high-low level; The output terminal of said on-off circuit is connected in the negative electrode of one first high level and said light emitting diode simultaneously, and the anode of said light emitting diode is connected in one second high level.
2. overheat indicating circuit for mainboard as claimed in claim 1; It is characterized in that: said overheat indicating circuit for mainboard also comprises a connector; Said connector comprises one first pin and one second pin; Said first pin is connected to said second high level, and said second pin is connected to the output terminal and said first high level of said on-off circuit simultaneously.
3. overheat indicating circuit for mainboard as claimed in claim 2 is characterized in that: the anode of said light emitting diode is connected to first pin of said connector, and the negative electrode of said light emitting diode is connected to second pin of said connector.
4. overheat indicating circuit for mainboard as claimed in claim 1; It is characterized in that: said on-off circuit comprises a positive-negative-positive triode; The output terminal of said temperature control chip is connected to the base stage of said positive-negative-positive triode; The grounded emitter of said positive-negative-positive triode, collector are connected to the negative electrode of said light emitting diode.
5. overheat indicating circuit for mainboard as claimed in claim 4 is characterized in that: said on-off circuit comprises that also one is series at first resistance between said temperature control chip output terminal and the said positive-negative-positive transistor base.
6. overheat indicating circuit for mainboard as claimed in claim 1; It is characterized in that: said on-off circuit comprises a P-channel enhancement type FET; The output terminal of said temperature control chip is connected to the grid of said P-channel enhancement type FET; The grounded drain of said P-channel enhancement type FET, source electrode are connected to the negative electrode of said light emitting diode.
7. overheat indicating circuit for mainboard as claimed in claim 1 is characterized in that: be provided with one second resistance between the output terminal of said on-off circuit and said first high level, be provided with one the 3rd resistance between the anode of said light emitting diode and said second high level.
8. overheat indicating circuit for mainboard as claimed in claim 1 is characterized in that: when the temperature of said functional chip exceeded the temperature of computer system setting, the output terminal of said temperature control chip produced said pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101005785A CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101005785A CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952838A CN1952838A (en) | 2007-04-25 |
| CN1952838B true CN1952838B (en) | 2012-03-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101005785A Expired - Fee Related CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Country Status (1)
| Country | Link |
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| CN (1) | CN1952838B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999096B (en) * | 2011-09-14 | 2016-03-30 | 中山市云创知识产权服务有限公司 | Computing machine |
| CN107332208B (en) * | 2016-04-29 | 2019-08-27 | 华为技术有限公司 | A kind of protection circuit, mainboard guard method and terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030190884A1 (en) * | 2002-04-04 | 2003-10-09 | Andrew Lee | Cooling fan with light-emitting device |
| CN2631184Y (en) * | 2003-07-17 | 2004-08-04 | 上海精密科学仪器有限公司 | LED drive circuit |
| CN1591351A (en) * | 2003-09-01 | 2005-03-09 | 联宇光通科技股份有限公司 | Computer system monitor |
| CN2731561Y (en) * | 2004-10-13 | 2005-10-05 | 七盟电子工业股份有限公司 | Failure warning system of radiator fan |
-
2005
- 2005-10-21 CN CN2005101005785A patent/CN1952838B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030190884A1 (en) * | 2002-04-04 | 2003-10-09 | Andrew Lee | Cooling fan with light-emitting device |
| CN2631184Y (en) * | 2003-07-17 | 2004-08-04 | 上海精密科学仪器有限公司 | LED drive circuit |
| CN1591351A (en) * | 2003-09-01 | 2005-03-09 | 联宇光通科技股份有限公司 | Computer system monitor |
| CN2731561Y (en) * | 2004-10-13 | 2005-10-05 | 七盟电子工业股份有限公司 | Failure warning system of radiator fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1952838A (en) | 2007-04-25 |
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Granted publication date: 20120314 Termination date: 20141021 |
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| EXPY | Termination of patent right or utility model |