CN204538653U - A kind of guard of computer circuit - Google Patents
A kind of guard of computer circuit Download PDFInfo
- Publication number
- CN204538653U CN204538653U CN201520287122.3U CN201520287122U CN204538653U CN 204538653 U CN204538653 U CN 204538653U CN 201520287122 U CN201520287122 U CN 201520287122U CN 204538653 U CN204538653 U CN 204538653U
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- pin
- resistance
- relay
- chip
- potentiometer
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Abstract
The utility model discloses a kind of guard of computer circuit; comprise transformer T, K switch, rectifier bridge Q, potentiometer RP1, potentiometer RP2, chip U1 and three terminal regulator U2; K switch one end connects 220V alternating current; the 220V alternating current other end connects computer power supply and transformer T coil L1 respectively; the computer power supply other end connects relay J contact J-1; relay J-1 other end is connecting valve K and the transformer T coil L1 other end respectively, and transformer T coil L2 one end connects rectifier bridge Q pin 4.The utility model guard of computer circuit can carry out under-voltage, overvoltage protection and power cut off delay protection, and can protect computer in all cases, intelligence degree is very high, and circuit structure is simple, and cost is low, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of guard of computer circuit.
Background technology
Along with the development of science and technology, computer has become one of requisite equipment in people's life, but present computer except notebook be all not internal battery, direct 220V civil power is needed to supply, be easy to bring very big inconvenience to the Working Life of people once have a power failure, even cause the damage of computer.
Utility model content
The purpose of this utility model is to provide a kind of circuit structure simple, multi-functional guard of computer circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of guard of computer circuit, comprises transformer T, K switch, rectifier bridge Q, potentiometer RP1, potentiometer RP2, chip U1 and three terminal regulator U2, described K switch one end connects 220V alternating current, the 220V alternating current other end connects computer power supply and transformer T coil L1 respectively, the computer power supply other end connects relay J contact J-1, relay J-1 other end is connecting valve K and the transformer T coil L1 other end respectively, transformer T coil L2 one end connects rectifier bridge Q pin 4, the rectifier bridge Q pin 2 connection transformer T coil L2 other end, rectifier bridge Q pin 1 contact resistance R1, the resistance R1 other end connects electric capacity C1 respectively, potentiometer RP1, potentiometer RP2 and three terminal regulator U2 pin 1, rectifier bridge Q pin 3 connect the electric capacity C1 other end respectively, the potentiometer RP1 other end, the potentiometer RP2 other end, resistance R4, resistance R5, chip U1 pin 1, electric capacity C2, relay J coil and diode D3 positive pole ground connection, potentiometer RP1 slide plate connects diode D2 positive pole, described potentiometer RP2 slide plate connecting triode VT1 base stage, the triode VT1 emitter contact resistance R4 other end, triode VT1 collector electrode connects diode D1 positive pole, and diode D1 negative pole is contact resistance R2 respectively, chip U1 pin 6, chip U1 pin 2, diode D2 negative pole and the resistance R5 other end, the resistance R2 other end connects relay J contact J-2, and the relay J contact J-2 other end connects electric capacity C2 respectively and relay J contact J-3, the electric capacity C3 other end connects three terminal regulator U2 pin 3 respectively, resistance R3, chip U1 pin 4, chip U1 pin 8 and resistance R6, the resistance R3 other end connects the relay J contact J-3 other end, and the described resistance R6 other end connects LED1 positive pole, and LED1 negative pole connects chip U1 pin 3 respectively, the relay J coil other end and diode D3 negative pole.
As further program of the utility model: described chip U1 model is NE555.
As the utility model further scheme: described three terminal regulator U2 model is 7805.
Compared with prior art; the beneficial effects of the utility model are: the utility model guard of computer circuit can carry out under-voltage, overvoltage protection and power cut off delay protection; can protect computer in all cases; intelligence degree is very high; and circuit structure is simple; cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of guard of computer circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of guard of computer circuit, comprises transformer T, K switch, rectifier bridge Q, potentiometer RP1, potentiometer RP2, chip U1 and three terminal regulator U2, K switch one end connects 220V alternating current, the 220V alternating current other end connects computer power supply and transformer T coil L1 respectively, the computer power supply other end connects relay J contact J-1, relay J-1 other end is connecting valve K and the transformer T coil L1 other end respectively, transformer T coil L2 one end connects rectifier bridge Q pin 4, the rectifier bridge Q pin 2 connection transformer T coil L2 other end, rectifier bridge Q pin 1 contact resistance R1, the resistance R1 other end connects electric capacity C1 respectively, potentiometer RP1, potentiometer RP2 and three terminal regulator U2 pin 1, rectifier bridge Q pin 3 connect the electric capacity C1 other end respectively, the potentiometer RP1 other end, the potentiometer RP2 other end, resistance R4, resistance R5, chip U1 pin 1, electric capacity C2, relay J coil and diode D3 positive pole ground connection, potentiometer RP1 slide plate connects diode D2 positive pole, potentiometer RP2 slide plate connecting triode VT1 base stage, the triode VT1 emitter contact resistance R4 other end, triode VT1 collector electrode connects diode D1 positive pole, and diode D1 negative pole is contact resistance R2 respectively, chip U1 pin 6, chip U1 pin 2, diode D2 negative pole and the resistance R5 other end, the resistance R2 other end connects relay J contact J-2, and the relay J contact J-2 other end connects electric capacity C2 respectively and relay J contact J-3, the electric capacity C3 other end connects three terminal regulator U2 pin 3 respectively, resistance R3, chip U1 pin 4, chip U1 pin 8 and resistance R6, the resistance R3 other end connects the relay J contact J-3 other end, and the resistance R6 other end connects LED1 positive pole, and LED1 negative pole connects chip U1 pin 3 respectively, the relay J coil other end and diode D3 negative pole.
Chip U1 model is NE555.
Three terminal regulator U2 model is 7805.
Operation principle of the present utility model is: refer to Fig. 1, the utility model can carry out under-voltage, overvoltage protection and power cut off delay protection, potentiometer RP1, potentiometer RP2 and triode VT1 etc. form overvoltage and under-voltage sample circuit, chip U1 is connected into bistable operation mode, when there is under-voltage or overvoltage condition, diode D1 or D2 conducting, 2/6 pin of chip U1 is high level, then chip U1 overturns and resets, chip U1 pin 3 output low level, relay J discharges, relay J contact J-1 disconnects, computer power supply disconnects, LED1 is luminous simultaneously, electric capacity C3, resistance R2 and resistance R5 etc. form time-delay start-up circuit, when firm start or instant cut-off, because the voltage on electric capacity C3 can not suddenly change, the pin 2 of chip U1 is peak positive voltage, now chip U1 is in reset mode, chip U1 pin 3 is in low level, relay J is failure to actuate, computer power supply is without electricity, now, LED1 is bright, along with the charging of electric capacity C3, when chip U1 pin 2, when the current potential of pin 6 is lower than 1/3 threshold voltage, chip U1 is set, chip U1 pin 3 is in high level, relay J adhesive, computer power supply obtains electric, simultaneously because relay J contact J-3 connects, electric capacity C3 is discharged rapidly by resistance R3, for next time delay is ready.
Claims (3)
1. a guard of computer circuit, comprises transformer T, K switch, rectifier bridge Q, potentiometer RP1, potentiometer RP2, chip U1 and three terminal regulator U2, it is characterized in that, described K switch one end connects 220V alternating current, the 220V alternating current other end connects computer power supply and transformer T coil L1 respectively, the computer power supply other end connects relay J contact J-1, relay J-1 other end is connecting valve K and the transformer T coil L1 other end respectively, transformer T coil L2 one end connects rectifier bridge Q pin 4, the rectifier bridge Q pin 2 connection transformer T coil L2 other end, rectifier bridge Q pin 1 contact resistance R1, the resistance R1 other end connects electric capacity C1 respectively, potentiometer RP1, potentiometer RP2 and three terminal regulator U2 pin 1, rectifier bridge Q pin 3 connect the electric capacity C1 other end respectively, the potentiometer RP1 other end, the potentiometer RP2 other end, resistance R4, resistance R5, chip U1 pin 1, electric capacity C2, relay J coil and diode D3 positive pole ground connection, potentiometer RP1 slide plate connects diode D2 positive pole, described potentiometer RP2 slide plate connecting triode VT1 base stage, the triode VT1 emitter contact resistance R4 other end, triode VT1 collector electrode connects diode D1 positive pole, and diode D1 negative pole is contact resistance R2 respectively, chip U1 pin 6, chip U1 pin 2, diode D2 negative pole and the resistance R5 other end, the resistance R2 other end connects relay J contact J-2, and the relay J contact J-2 other end connects electric capacity C2 respectively and relay J contact J-3, the electric capacity C3 other end connects three terminal regulator U2 pin 3 respectively, resistance R3, chip U1 pin 4, chip U1 pin 8 and resistance R6, the resistance R3 other end connects the relay J contact J-3 other end, and the described resistance R6 other end connects LED1 positive pole, and LED1 negative pole connects chip U1 pin 3 respectively, the relay J coil other end and diode D3 negative pole.
2. guard of computer circuit according to claim 1, is characterized in that, described chip U1 model is NE555.
3. guard of computer circuit according to claim 1, is characterized in that, described three terminal regulator U2 model is 7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287122.3U CN204538653U (en) | 2015-05-07 | 2015-05-07 | A kind of guard of computer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287122.3U CN204538653U (en) | 2015-05-07 | 2015-05-07 | A kind of guard of computer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204538653U true CN204538653U (en) | 2015-08-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520287122.3U Expired - Fee Related CN204538653U (en) | 2015-05-07 | 2015-05-07 | A kind of guard of computer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204538653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106648010A (en) * | 2016-12-27 | 2017-05-10 | 郑州诚合信息技术有限公司 | Computer system safety power source |
-
2015
- 2015-05-07 CN CN201520287122.3U patent/CN204538653U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106648010A (en) * | 2016-12-27 | 2017-05-10 | 郑州诚合信息技术有限公司 | Computer system safety power source |
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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: 20150805 Termination date: 20160507 |