CN207586378U - A kind of NE555 chip failure detection devices - Google Patents
A kind of NE555 chip failure detection devices Download PDFInfo
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- CN207586378U CN207586378U CN201721617435.6U CN201721617435U CN207586378U CN 207586378 U CN207586378 U CN 207586378U CN 201721617435 U CN201721617435 U CN 201721617435U CN 207586378 U CN207586378 U CN 207586378U
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- comparator
- multivibrator
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- reference voltage
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- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model is related to a kind of NE555 chip failure detection devices, belong to fault detection technique field.The utility model includes multivibrator, reference voltage, comparator I, comparator II, green light, red light；I positive input terminal of comparator is connect with multivibrator, I negative input end of comparator is connect with reference voltage, I output terminal of comparator is connect with green light, II positive input terminal of comparator is connect with reference voltage, II negative input end of comparator is connect with multivibrator, II output terminal of comparator is connect with red light, and multivibrator is connect with detected NE555 chips.The utility model detection device is efficiently intuitive, it is only necessary to see the color of lamp；Structure of the detecting device is simple, is readily produced；Detection device is of low cost, application easy to spread.
Description
Technical field
The utility model is related to a kind of NE555 chip failure detection devices, belong to fault detection technique field.
Background technology
NE555 is a Multifunctional digital simulation hydrid integrated circuit, is one and has many uses and fairly common timing
IC.Since Signetics companies are after 1972 release this product, major E-Device Inc. of the world all produces respective
555 chips, this chip are worldwide widely applied.
Just because of this, along with the large-scale application of NE555 chips, the fault detection problem of NE555 application circuits is also general
Store-through exists.According to traditional fault detection method, need to judge the working condition of entire circuit, to the every of circuit
A element is detected, and process is complicated, and detection time is long.
Utility model content
The purpose of this utility model is to provide a kind of NE555 chip failure detection devices, to solve existing NE555 chips event
Hinder the problems such as detection process is complicated, detection time is long.
The utility model is realized by following technical scheme：A kind of NE555 chip failure detection devices, including multivibrator
1st, reference voltage 2, comparator I 3, comparator II 4, green light 5, red light 6；I 3 positive input terminal of comparator is connect with multivibrator 1,
I 3 negative input end of comparator is connect with reference voltage 2, and I 3 output terminal of comparator is connect with green light 5, II 4 positive input terminal of comparator with
Reference voltage 2 connects, and II 4 negative input end of comparator is connect with multivibrator 1, and II 4 output terminal of comparator is connect with red light 6,
Multivibrator 1 is connect with detected NE555 chips, and multivibrator 1 is used to detect whether NE555 chips work normally, when
NE555 chip operations are normal, and multivibrator 1 generates PWM wave, and when NE555 chips do not work, multivibrator 1 does not generate PWM
Wave, for generating constant voltage signal, value is less than the virtual value for the PWM wave that multivibrator 1 generates, compares reference voltage 2
The constant voltage signal that PWM wave and the reference voltage 2 that device I 3, comparator II 4 are used to comparing the generation of multivibrator 1 generate it is big
Small, for showing NE555 chip normal operating conditions, red light 6 is used to show NE555 chip off positions green light 5.
A kind of operation principle of NE555 chip failure detection devices is：First NE555 chips to be detected and NE555
Chip failure detection device connects, and when NE555 chips work normally, multivibrator 1 generates PWM wave, the virtual value of PWM wave
More than the constant voltage signal of reference voltage 2, I 3 positive input terminal of comparator is more than negative input end at this time, comparator II 4 it is just defeated
Enter end and be less than negative input end, comparator I 3 exports high level signal, and the green light 5 being connect with I 3 output terminal of comparator lights, and compares
Low level signal is exported compared with device II 4, the red light 6 being connect with II 4 output terminal of comparator keeps OFF state；When NE555 chips not
During work, multivibrator 1 does not generate PWM wave, and I 3 positive input terminal signal of comparator is zero, II 4 negative input end signal of comparator
It is zero, I 3 positive input terminal of comparator is less than negative input end at this time, and the positive input terminal of comparator II 4 is more than negative input end, comparator I
3 output low level signals, the green light 5 being connect with I 3 output terminal of comparator extinguishes, and comparator II 4 exports high level signal, with
The red light 6 of II 4 output terminal of comparator connection lights.Therefore can rapidly be judged by observing the light on and off of green light 5 and red light 6
NE555 chips whether failure.When green light 5 is lighted and red light 6 extinguishes, NE555 chips are normal；When green light 5 extinguishes and red
When lamp 6 is lighted, NE555 chips are faulty.
The utility model has the advantages that：
1st, detection device is efficiently intuitive, it is only necessary to see the color of lamp；
2nd, structure of the detecting device is simple, is readily produced；
3rd, detection device is of low cost, application easy to spread.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
In figure respectively marked as：1：Multivibrator, 2：Reference voltage, 3：Comparator I, 4：Comparator II, 5：Green light, 6：It is red
Lamp.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in further detail, but the content of the utility model is not
It is limited to the range.
Embodiment 1：As shown in Figure 1, a kind of NE555 chip failure detection devices, including multivibrator 1, reference voltage
2nd, comparator I 3, comparator II 4, green light 5, red light 6；I 3 positive input terminal of comparator is connect with multivibrator 1, and comparator I 3 is negative
Input terminal is connect with reference voltage 2, and I 3 output terminal of comparator is connect with green light 5, II 4 positive input terminal of comparator and reference voltage 2
Connection, II 4 negative input end of comparator are connect with multivibrator 1, and II 4 output terminal of comparator is connect with red light 6, multivibrator
1 connect with detected NE555 chips, and multivibrator 1 is for detecting whether NE555 chips work normally, when NE555 chip works
Make normally, multivibrator 1 generates PWM wave, and when NE555 chips do not work, multivibrator 1 does not generate PWM wave, reference voltage
2 for generating constant voltage signal, and value is less than the virtual value for the PWM wave that multivibrator 1 generates, comparator I 3, comparator
II 4 for comparing the size of constant voltage signal that the PWM wave of the generation of multivibrator 1 is generated with reference voltage 2, and green light 5 is used
In display NE555 chip normal operating conditions, red light 6 is used to show NE555 chip off positions.
Claims (1)
1. a kind of NE555 chip failure detection devices, it is characterised in that：Including multivibrator（1）, reference voltage（2）, compare
Device I（3）, comparator II（4）, green light（5）, red light（6）；Comparator I（3）Positive input terminal and multivibrator（1）Connection, compares
Device I（3）Negative input end and reference voltage（2）Connection, comparator I（3）Output terminal and green light（5）Connection, comparator II（4）It is just defeated
Enter end and reference voltage（2）Connection, comparator II（4）Negative input end and multivibrator（1）Connection, comparator II（4）Output
End and red light（6）Connection, multivibrator（1）It is connect with detected NE555 chips, multivibrator（1）For detecting NE555
Whether chip works normally, when NE555 chip operations are normal, multivibrator（1）PWM wave is generated, when NE555 chips not work
Make, multivibrator（1）Do not generate PWM wave, reference voltage（2）For generating constant voltage signal, value is less than multi-harmonic-oscillations
Device（1）The virtual value of the PWM wave of generation, comparator I（3）, comparator II（4）For comparing multivibrator（1）The PWM of generation
Wave and reference voltage（2）The size of the constant voltage signal of generation, green light（5）For showing NE555 chip normal operating conditions,
Red light（6）For showing NE555 chip off positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721617435.6U CN207586378U (en) | 2017-11-28 | 2017-11-28 | A kind of NE555 chip failure detection devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721617435.6U CN207586378U (en) | 2017-11-28 | 2017-11-28 | A kind of NE555 chip failure detection devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207586378U true CN207586378U (en) | 2018-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721617435.6U Expired - Fee Related CN207586378U (en) | 2017-11-28 | 2017-11-28 | A kind of NE555 chip failure detection devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207586378U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823867A (en) * | 2020-07-13 | 2020-10-27 | 珠海格力电器股份有限公司 | Electric vehicle, driving and controlling equipment and safety monitoring method thereof |
-
2017
- 2017-11-28 CN CN201721617435.6U patent/CN207586378U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823867A (en) * | 2020-07-13 | 2020-10-27 | 珠海格力电器股份有限公司 | Electric vehicle, driving and controlling equipment and safety monitoring method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20181128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |