CN204117458U - The break alarm circuit of 555 IC design educations - Google Patents
The break alarm circuit of 555 IC design educations Download PDFInfo
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- CN204117458U CN204117458U CN201420665888.6U CN201420665888U CN204117458U CN 204117458 U CN204117458 U CN 204117458U CN 201420665888 U CN201420665888 U CN 201420665888U CN 204117458 U CN204117458 U CN 204117458U
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Abstract
The utility model provides a kind of break alarm circuit of 555 IC design educations, this circuit is by trigger flip-flop, monostalbe trigger and astable multibrator composition, wherein trigger flip-flop, monostalbe trigger and astable multibrator are all the element circuits of 555 integrated circuit compositions, the broken string mimic channel that can trigger its output state flip is provided with in the trigger circuit of trigger flip-flop, the output terminal of trigger flip-flop is connected to the trigger end of monostalbe trigger, the output terminal of monostalbe trigger is connected to the reset terminal of astable multibrator, the output terminal of astable multibrator is connected with warning circuit.By the ocular demonstration of this functional circuitry, the confirmatory experiment of the separate unit circuit of 555 integrated circuit compositions originally dry as dust is made to become more lively, thus improve the interest of students' participation experiment, enhance the effect of experimental teaching, make students can have better understanding to 555 integrated circuit and element circuit thereof.
Description
Technical field
The utility model relates to a kind of warning circuit, and especially a kind of break alarm circuit of 555 IC design educations, belongs to electronic technology field.
Background technology
555 integrated circuit are devices conventional in digital circuit, consisting of element circuit, if trigger flip-flop, monostalbe trigger and astable multibrator are the main contents of Education of Digital Electronics.Understand and grasp the element circuit of above-mentioned 555 integrated circuit compositions in order to allow student, in teaching, usually arrange have separately independently trigger flip-flop experiment, monostalbe trigger experiment and astable multibrator experiment.But because respective independent trigger flip-flop experiment, monostalbe trigger experiment and astable multibrator experiment are all replication experiments, be difficult to the interest attracting student, therefore, teaching efficiency is also bad.
" electronic technical experiment teaching is thought deeply " literary composition being published in " laboratory study and exploration " periodical in July, 2012 is thought, student is not interested to electronic technology replication experiment, cause experiment teaching effect bad, improve electronic technical experiment teaching effect, must a little attractive experimental project be designed, participate in the interest of experiment with mobilizing students.
Utility model content
The bad problem of proving test teaching efficiency is carried out in order to solve the respective independently element circuit of above-mentioned employing 555 integrated circuit composition, the utility model provides a kind of break alarm circuit of 555 IC design educations, this circuit is integrated with the element circuit of trigger flip-flop, monostalbe trigger and the astable multibrator be made up of 555 integrated circuit, and add the function of break alarm, be applied to 555 experimental ic teaching, be intended to the interest improving students' participation experiment, improve the effect of 555 experimental ic teaching.
Technical thought of the present utility model is: design a functional circuitry be made up of trigger flip-flop, monostalbe trigger and astable multibrator, replace respective independently trigger flip-flop, monostalbe trigger and astable multibrator, uninteresting proving test is become lively functional trial.
The concrete technical scheme that the utility model is taked is as follows:
A kind of break alarm circuit of 555 IC design educations, it is characterized in that: this circuit is by trigger flip-flop, monostalbe trigger and astable multibrator composition, wherein trigger flip-flop, monostalbe trigger and astable multibrator are all the element circuits of 555 integrated circuit compositions, the broken string mimic channel that can trigger its output state flip is provided with in the trigger circuit of trigger flip-flop, the output terminal of trigger flip-flop is connected to the trigger end of monostalbe trigger, the output terminal of monostalbe trigger is connected to the reset terminal of astable multibrator, the output terminal of astable multibrator is connected with warning circuit.
The principle of work of this break alarm circuit is: when the broken string mimic channel in the trigger circuit of trigger flip-flop disconnects, the output state flip of trigger flip-flop, and then monostable trigger is turned to temporary stable state, be between temporary steady state period at monostalbe trigger, astable multibrator works, and exports square wave and drives warning circuit; After the timing of monostalbe trigger, stable state is got back in monostalbe trigger upset, and astable multibrator stops oscillation, and warning circuit quits work.
The utility model is by the functional circuitry of a design break alarm, inside includes the element circuit of the trigger flip-flop be made up of 555 integrated circuit, monostalbe trigger and the astable multibrator needing study, by the ocular demonstration of this functional circuitry, the confirmatory experiment of the separate unit circuit of 555 integrated circuit compositions originally dry as dust is made to become more lively, thus improve the interest of students' participation experiment, enhance the effect of experimental teaching, make students can have better understanding to 555 integrated circuit and element circuit thereof.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is specific implementation circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, the break alarm circuit of these 555 IC design educations is by trigger flip-flop 10, monostalbe trigger 20 and astable multibrator 30 form, wherein trigger flip-flop 10, monostalbe trigger 20 and astable multibrator 30 are all the element circuits of 555 integrated circuit compositions, the broken string mimic channel 101 that can trigger its output state flip is provided with in the trigger circuit of trigger flip-flop 10, the output terminal of trigger flip-flop 10 is connected to the trigger end of monostalbe trigger 20, the output terminal of monostalbe trigger 20 is connected to the reset terminal of astable multibrator 30, the output terminal of astable multibrator 30 is connected with warning circuit 301.
Specific implementation circuit diagram of the present utility model as shown in Figure 2, trigger flip-flop 10 is by 555 integrated circuit U1, resistance R1, resistance R2, touch-switch S1 and thin wire Line forms, 4 pin and 8 pin of 555 integrated circuit U1 connect positive power source terminal, 1 pin is held with being connected to, 6 pin are connected to one end of resistance R1 and one end of thin wire Line, 2 pin are connected to one end of resistance R2 and one end of touch-switch S1, the other end of resistance R1 and resistance R2 is all connected to positive power source terminal, the other end all ground connection of thin wire Line and touch-switch S1, broken string mimic channel 101 is formed by resistance R1 and thin wire Line.
Monostalbe trigger 20 is made up of 555 integrated circuit U2, resistance R3, resistance R4, electric capacity C1 and electric capacity C2,4 pin and 8 pin of 555 integrated circuit U2 connect positive power source terminal, 1 pin is held with being connected to, 2 pin are connected to one end of resistance R3 and one end of electric capacity C1,6 pin and 7 pin are all connected to one end of resistance R4 and one end of electric capacity C2, the other end of resistance R3 and resistance R4 is all connected to positive power source terminal, and the other end of electric capacity C1 is connected to 3 pin of 555 integrated circuit U1 of trigger flip-flop 10, the other end ground connection of electric capacity C2.
Astable multibrator 30 is by 555 integrated circuit U3, resistance R5, resistance R6, electric capacity C3 and light emitting diode D1 forms, 8 pin of 555 integrated circuit U3 connect positive power source terminal, 1 pin is held with being connected to, 4 pin are connected to 3 pin of 555 integrated circuit U2 of monostalbe trigger 20, 2 pin and 6 pin are all connected to one end of resistance R5 and one end of electric capacity C3, 3 pin of another termination 555 integrated circuit U3 of resistance R5, the other end ground connection of electric capacity C3, the two ends of resistance R6 are connected to 3 pin of 555 integrated circuit U3 and the positive pole of light emitting diode D1 respectively, the minus earth of light emitting diode D1, warning circuit 301 is formed by resistance R6 and light emitting diode D1.
The experimentation that application the utility model circuit carries out is as follows:
(1), connect thin wire Line, by a touch-switch S1, make the 3 pin voltages of 555 integrated circuit U1 export high level.
(2), LED flash D1 is observed, until it goes out.
(3), thin wire Line is disconnected, simulation broken string situation occurs, 3 pin of monitoring 555 integrated circuit U2 export the duration of high level, observe light emitting diode D1 flicker, the 3 pin voltage waveforms of 555 integrated circuit U3 are observed, record output side wave period, ceiling voltage and minimum voltage with oscillograph.
Claims (2)
1. the break alarm circuit of an IC design education, it is characterized in that: this circuit is by trigger flip-flop (10), monostalbe trigger (20) and astable multibrator (30) composition, wherein trigger flip-flop (10), monostalbe trigger (20) and astable multibrator (30) are all the element circuits of 555 integrated circuit compositions, the broken string mimic channel (101) that can trigger its output state flip is provided with in the trigger circuit of trigger flip-flop (10), the output terminal of trigger flip-flop (10) is connected to the trigger end of monostalbe trigger (20), the output terminal of monostalbe trigger (20) is connected to the reset terminal of astable multibrator (30), the output terminal of astable multibrator (30) is connected with warning circuit (301).
2. break alarm circuit according to claim 1, it is characterized in that: trigger flip-flop (10) is by 555 integrated circuit U1, resistance R1, resistance R2, touch-switch S1 and thin wire Line forms, 4 pin and 8 pin of 555 integrated circuit U1 connect positive power source terminal, 1 pin is held with being connected to, 6 pin are connected to one end of resistance R1 and one end of thin wire Line, 2 pin are connected to one end of resistance R2 and one end of touch-switch S1, the other end of resistance R1 and resistance R2 is all connected to positive power source terminal, the other end all ground connection of thin wire Line and touch-switch S1, broken string mimic channel (101) is formed by resistance R1 and thin wire Line,
Monostalbe trigger (20) is made up of 555 integrated circuit U2, resistance R3, resistance R4, electric capacity C1 and electric capacity C2,4 pin and 8 pin of 555 integrated circuit U2 connect positive power source terminal, 1 pin is held with being connected to, 2 pin are connected to one end of resistance R3 and one end of electric capacity C1,6 pin and 7 pin are all connected to one end of resistance R4 and one end of electric capacity C2, the other end of resistance R3 and resistance R4 is all connected to positive power source terminal, the other end of electric capacity C1 is connected to 3 pin of 555 integrated circuit U1 of trigger flip-flop (10), the other end ground connection of electric capacity C2;
Astable multibrator (30) is by 555 integrated circuit U3, resistance R5, resistance R6, electric capacity C3 and light emitting diode D1 forms, 8 pin of 555 integrated circuit U3 connect positive power source terminal, 1 pin is held with being connected to, 4 pin are connected to 3 pin of 555 integrated circuit U2 of monostalbe trigger (20), 2 pin and 6 pin are all connected to one end of resistance R5 and one end of electric capacity C3, 3 pin of another termination 555 integrated circuit U3 of resistance R5, the other end ground connection of electric capacity C3, the two ends of resistance R6 are connected to 3 pin of 555 integrated circuit U3 and the positive pole of light emitting diode D1 respectively, the minus earth of light emitting diode D1, warning circuit (301) is formed by resistance R6 and light emitting diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665888.6U CN204117458U (en) | 2014-11-10 | 2014-11-10 | The break alarm circuit of 555 IC design educations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665888.6U CN204117458U (en) | 2014-11-10 | 2014-11-10 | The break alarm circuit of 555 IC design educations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204117458U true CN204117458U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420665888.6U Expired - Fee Related CN204117458U (en) | 2014-11-10 | 2014-11-10 | The break alarm circuit of 555 IC design educations |
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| Country | Link |
|---|---|
| CN (1) | CN204117458U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206149A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Flash lamp circuit for 555 integrated circuit teaching |
| CN105207654A (en) * | 2015-10-28 | 2015-12-30 | 广西职业技术学院 | Timing circuit based on 555 integrated chips |
-
2014
- 2014-11-10 CN CN201420665888.6U patent/CN204117458U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206149A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Flash lamp circuit for 555 integrated circuit teaching |
| CN105207654A (en) * | 2015-10-28 | 2015-12-30 | 广西职业技术学院 | Timing circuit based on 555 integrated chips |
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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: 20150121 Termination date: 20161110 |