CN203233381U - Anti interference timer based on 555 time base circuit - Google Patents
Anti interference timer based on 555 time base circuit Download PDFInfo
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- CN203233381U CN203233381U CN 201320203372 CN201320203372U CN203233381U CN 203233381 U CN203233381 U CN 203233381U CN 201320203372 CN201320203372 CN 201320203372 CN 201320203372 U CN201320203372 U CN 201320203372U CN 203233381 U CN203233381 U CN 203233381U
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Abstract
The utility model discloses an anti interference timer based on a 555 time base circuit. The anti interference timer comprises a transformer, a potentiometer, a bridge rectification circuit, a relay, a light emitting diode, the time base circuit, a voltage stabilizing integration circuit, a first switch, a second switch, a first diode, a second diode, a third diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor. The first end of the first switch is respectively connected with the first end of the third resistor, the first end of the fourth resistor, the first end of the potentiometer, the power supply end of the time base circuit, the first end of the fifth capacitor, the first end of the sixth capacitor and the first end of the voltage stabilizing integration circuit. According to the utility model, the anti interference timer based on the 555 time base circuit has the advantages of is simple structure, stable working state and strong ant interference performance.
Description
Technical field
The utility model relates to a kind of timer, relates in particular to a kind of anti-interference timer based on 555 time-base circuits.
Background technology
Timer circuit in the market is divided into mechanical timer and electronic timer, there is problem fragile and that maintenance is inconvenient in mechanical timer, by contrast electronic timer simple in structure, volume is small and exquisite, easy-maintaining, but electronic timer but is subjected to the interference of external signal easily and operating state is stable inadequately.
The utility model content
The purpose of this utility model just is to provide in order to address the above problem the anti-interference timer based on 555 time-base circuits of a kind of simple in structure, stable working state, strong anti-interference performance.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model is based on the anti-interference timer of 555 time-base circuits, comprise transformer, potentiometer, bridge rectifier, relay, light-emitting diode, time-base circuit, integrated regulator, first switch, second switch, first diode, second diode, the 3rd diode, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity and the 7th electric capacity, first end of described first switch respectively with first end of described the 3rd resistance, first end of described the 4th resistance, first end of described potentiometer, the power end of described time-base circuit, first end of described the 5th electric capacity, first end of described the 6th electric capacity and first end of described integrated regulator are connected, second end of described first switch is connected with first end of described first resistance and the positive pole of described first diode respectively, the negative pole of described first diode respectively with the clear terminal of described time-base circuit, first end of the negative pole of described second diode and described the 6th resistance is connected, second end of described first resistance respectively with first end of described second resistance, first end of described first electric capacity and the base stage of described triode are connected, the collector electrode of described triode is connected with second end of described the 3rd resistance and first end of described second electric capacity respectively, second end of described second electric capacity is connected with second end of described the 4th resistance and the low triggering end of described time-base circuit respectively, second end of described potentiometer is connected with the sliding end of described potentiometer and first end of the 5th resistance respectively, second end of described the 5th resistance respectively with the high-triggering end of described time-base circuit, first end of the discharge end of described time-base circuit and described the 3rd electric capacity is connected, the positive pole of described second diode is connected with the positive pole of described light-emitting diode and the output of described time-base circuit respectively, first end of described the 4th electric capacity is connected with the voltage controling end of described time-base circuit, the negative pole of described light-emitting diode is connected with the negative pole of described the 3rd diode and first end of described relay respectively, second end of described the 6th resistance respectively with second end of described the 5th electric capacity, second end of described the 6th electric capacity, second end of described integrated regulator, second end of described second resistance, second end of described first electric capacity, the emitter of described triode, second end of described the 3rd electric capacity, the earth terminal of described time-base circuit, second end of described the 4th electric capacity, the positive pole of described the 3rd diode, second end of described relay, first end of described the 7th electric capacity and first end of described bridge rectifier are connected, second end of described the 7th electric capacity is connected with the 3rd end of described integrated regulator and second end of described bridge rectifier respectively, the 3rd end of described bridge rectifier is connected with first end of a winding of described transformer, the 4th end of described bridge rectifier is connected with second end of a winding of described transformer, first end of the secondary winding of described transformer is connected with the positive polarity input with first end of described second switch respectively, and second end of the secondary winding of described transformer is connected with the voltage negative input with second end of described second switch respectively.
The beneficial effects of the utility model are:
The utility model is based on simple in structure, stable working state, the strong anti-interference performance of the anti-interference timer of 555 time-base circuits.
Description of drawings
Fig. 1 is that the utility model is based on the circuit diagram of the anti-interference timer of 555 time-base circuits.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model is based on the anti-interference timer of 555 time-base circuits, comprise transformer T, potentiometer RP, bridge rectifier BR, relay K, LED, time-base circuit IC1, integrated regulator IC2, first switch S 1, second switch S2, the first diode D1, the second diode D2, the 3rd diode D3, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6 and the 7th capacitor C 7, first end of first switch S 1 respectively with first end of the 3rd resistance R 3, first end of the 4th resistance R 4, first end of potentiometer RP, the power end of time-base circuit IC1, first end of the 5th capacitor C 5, first end of the 6th capacitor C 6 is connected with first end of integrated regulator IC2, second end of first switch S 1 is connected with first end of first resistance R 1 and the positive pole of the first diode D1 respectively, the negative pole of the first diode D1 respectively with the clear terminal of time-base circuit IC1, the negative pole of the second diode D2 is connected with first end of the 6th resistance R 6, second end of first resistance R 1 respectively with first end of second resistance R 2, first end of first capacitor C 1 is connected with the base stage of triode VT, the collector electrode of triode VT is connected with second end of the 3rd resistance R 3 and first end of second capacitor C 2 respectively, second end of second capacitor C 2 is connected with second end of the 4th resistance R 4 and the low triggering end of time-base circuit IC1 respectively, second end of potentiometer RP is connected with the sliding end of potentiometer RP and first end of the 5th resistance R 5 respectively, second end of the 5th resistance R 5 respectively with the high-triggering end of time-base circuit IC1, the discharge end of time-base circuit IC1 is connected with first end of the 3rd capacitor C 3, the positive pole of the second diode D2 is connected with the positive pole of LED and the output of time-base circuit IC1 respectively, first end of the 4th capacitor C 4 is connected with the voltage controling end of time-base circuit IC1, the negative pole of LED is connected with the negative pole of the 3rd diode D3 and first end of relay K respectively, second end of the 6th resistance R 6 respectively with second end of the 5th capacitor C 5, second end of the 6th capacitor C 6, second end of integrated regulator IC2, second end of second resistance R 2, second end of first capacitor C 1, the emitter of triode VT, second end of the 3rd capacitor C 3, the earth terminal of time-base circuit IC1, second end of the 4th capacitor C 4, the positive pole of the 3rd diode D3, second end of relay K, first end of the 7th capacitor C 7 is connected with first end of bridge rectifier BR, second end of the 7th capacitor C 7 is connected with the 3rd end of integrated regulator IC2 and second end of bridge rectifier BR respectively, the 3rd end of bridge rectifier BR is connected with first end of the winding of transformer T, the 4th end of bridge rectifier BR is connected with second end of the winding of transformer T, first end of the secondary winding of transformer T is connected with the positive polarity input with first end of second switch S2 respectively, and second end of the secondary winding of transformer T is connected with the voltage negative input with second end of second switch S2 respectively.
Use the utility model as follows based on the operation principle of the anti-interference timer of 555 time-base circuits:
When first switch S 1 disconnected, the clear terminal of time-base circuit IC1 was by the 6th resistance R 6 ground connection, and time-base circuit IC1 is forced to reset.At this moment, no matter the low triggering end of time-base circuit IC1 is subjected to great interference, and time-base circuit IC1 does not work.After first switch S, 1 closure, power supply is added to high level of time-base circuit IC1 by the first diode D1, the forced resetting function of time-base circuit IC1 is removed, power supply is added on the base stage of triode VT by first resistance R 1 simultaneously, make triode VT conducting, low triggering end to time-base circuit IC1 after second capacitor C 2 links to each other by the collector electrode with triode VT is exported a low level, the time-base circuit IC1 set of overturning, time-base circuit IC1 exports high level, LED is lighted, relay K gets, second switch S2 closure, circuit is externally powered, and simultaneously the high level of the output of time-base circuit IC1 makes the circuit self-locking by the second diode D2 to high level of clear terminal output of time-base circuit IC1.After transient state finished, circuit returned stable state, the output output low level of time-base circuit IC1, and the relay K dead electricity, second switch S2 disconnects, and circuit returns to initial condition.
Claims (1)
1. anti-interference timer based on 555 time-base circuits, it is characterized in that: comprise transformer, potentiometer, bridge rectifier, relay, light-emitting diode, time-base circuit, integrated regulator, first switch, second switch, first diode, second diode, the 3rd diode, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity and the 7th electric capacity, first end of described first switch respectively with first end of described the 3rd resistance, first end of described the 4th resistance, first end of described potentiometer, the power end of described time-base circuit, first end of described the 5th electric capacity, first end of described the 6th electric capacity and first end of described integrated regulator are connected, second end of described first switch is connected with first end of described first resistance and the positive pole of described first diode respectively, the negative pole of described first diode respectively with the clear terminal of described time-base circuit, first end of the negative pole of described second diode and described the 6th resistance is connected, second end of described first resistance respectively with first end of described second resistance, first end of described first electric capacity and the base stage of described triode are connected, the collector electrode of described triode is connected with second end of described the 3rd resistance and first end of described second electric capacity respectively, second end of described second electric capacity is connected with second end of described the 4th resistance and the low triggering end of described time-base circuit respectively, second end of described potentiometer is connected with the sliding end of described potentiometer and first end of the 5th resistance respectively, second end of described the 5th resistance respectively with the high-triggering end of described time-base circuit, first end of the discharge end of described time-base circuit and described the 3rd electric capacity is connected, the positive pole of described second diode is connected with the positive pole of described light-emitting diode and the output of described time-base circuit respectively, first end of described the 4th electric capacity is connected with the voltage controling end of described time-base circuit, the negative pole of described light-emitting diode is connected with the negative pole of described the 3rd diode and first end of described relay respectively, second end of described the 6th resistance respectively with second end of described the 5th electric capacity, second end of described the 6th electric capacity, second end of described integrated regulator, second end of described second resistance, second end of described first electric capacity, the emitter of described triode, second end of described the 3rd electric capacity, the earth terminal of described time-base circuit, second end of described the 4th electric capacity, the positive pole of described the 3rd diode, second end of described relay, first end of described the 7th electric capacity and first end of described bridge rectifier are connected, second end of described the 7th electric capacity is connected with the 3rd end of described integrated regulator and second end of described bridge rectifier respectively, the 3rd end of described bridge rectifier is connected with first end of a winding of described transformer, the 4th end of described bridge rectifier is connected with second end of a winding of described transformer, first end of the secondary winding of described transformer is connected with the positive polarity input with first end of described second switch respectively, and second end of the secondary winding of described transformer is connected with the voltage negative input with second end of described second switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320203372 CN203233381U (en) | 2013-04-22 | 2013-04-22 | Anti interference timer based on 555 time base circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320203372 CN203233381U (en) | 2013-04-22 | 2013-04-22 | Anti interference timer based on 555 time base circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233381U true CN203233381U (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320203372 Expired - Fee Related CN203233381U (en) | 2013-04-22 | 2013-04-22 | Anti interference timer based on 555 time base circuit |
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| Country | Link |
|---|---|
| CN (1) | CN203233381U (en) |
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2013
- 2013-04-22 CN CN 201320203372 patent/CN203233381U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140422 |