CN104318686A - Household double-sound doorbell circuit - Google Patents
Household double-sound doorbell circuit Download PDFInfo
- Publication number
- CN104318686A CN104318686A CN201410618260.5A CN201410618260A CN104318686A CN 104318686 A CN104318686 A CN 104318686A CN 201410618260 A CN201410618260 A CN 201410618260A CN 104318686 A CN104318686 A CN 104318686A
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- CN
- China
- Prior art keywords
- resistance
- electric capacity
- triode
- resistor
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a household double-sound doorbell circuit. The household double-sound doorbell circuit comprises a battery, a switch, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first audion, a second audion, a third audion, a fourth audion and a loudspeaker. The household double-sound doorbell circuit adopts two sets of oscillators, one oscillator is a self-excited multivibrator, and the other oscillator is a tone oscillator. When the self-excited multivibrator works, two audions are switched on or off in turn to control the oscillation frequency of the tone oscillator, so that the loudspeaker gives out sounds of two tones. The capacitors in the circuit can filter out circuit interference, so that the sounds given out by the loudspeaker are clearer. In addition, the household double-sound doorbell circuit is simple in structure, is provided with fewer elements, is low in cost and is favorable for popularization.
Description
Technical field
The present invention relates to a kind of family expenses guest alert device, particularly relate to a kind of family expenses alliteration doorbell circuit.
Background technology
Doorbell is the device reminding owner to have visitor's visiting of sounding, doorbell is seldom heard at ancient Chinese, rich rich family is that ornamental knocker is housed on gate, the people called at the door can send larger sound with the knocker doornail bounced under ring, use to make doorbell, in modern age, doorbell is no longer the special project of the well to do, civilian, other extensively generally applies, and " doorbell " miscellaneous can be found everywhere.At present, the doorbell often seen in our daily life is by bell button wireless signal emission, and the wireless signal receiver of indoor set receives this wireless signal, and then jingle bell.But many family expenses doorbell tones are single, and tonequality is unintelligible, when I have a visit from a guest, doorbell sound reminds poor effect, and circuit structure is complicated, element is many, cost is high, is difficult to universal and promotes.
Summary of the invention
Object of the present invention is just to provide a kind of family expenses alliteration doorbell circuit to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes battery, switch, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first triode, second triode, 3rd triode, 4th triode and loudspeaker, the positive pole of described battery simultaneously with the emitter-base bandgap grading of described first triode, the first end of described 6th electric capacity, the emitter-base bandgap grading of described 4th triode, the first end of described 7th resistance is connected with the emitter-base bandgap grading of described second triode, the collector of described 4th triode is connected with the first end of described loudspeaker and the first end of described 5th electric capacity simultaneously, the base stage of described 4th triode connects the collector of described 3rd triode, the base stage of described 3rd triode simultaneously with the second end of described 5th electric capacity, the first end of described 6th resistance, second end of described 7th resistance is connected with the first end of described 5th resistance, the second end of described 5th resistance simultaneously with the collector of described second triode, the first end of described 4th resistance, the first end of described 3rd electric capacity is connected with the first end of described 4th electric capacity, the base stage of described second triode is connected with the first end of described second resistance and the first end of described first electric capacity simultaneously, the base stage of described first triode is connected with the first end of described 3rd resistance and the second end of described 4th electric capacity simultaneously, with the second end of described first electric capacity while of the collector of described first triode, the first end of described second electric capacity is connected with the first end of described first resistance, and the second end of described second electric capacity connects the second end of described 3rd electric capacity, the second end of described first resistance simultaneously with the second end of described second resistance, second end of described 3rd resistance, second end of described 4th resistance is connected with the first end of described 8th resistance, the second end of described 8th resistance simultaneously with the second end of described 6th resistance, the emitter-base bandgap grading of described 3rd triode, second end of described loudspeaker, second end of described 6th electric capacity is connected with the first end of described switch, and the second end of described switch connects the negative pole of described battery.
Beneficial effect of the present invention is:
The present invention adopts two groups of oscillators, one group is free-running multivibrator, one group is tone alternator, during free-running multivibrator work, and its two triodes conducting and cut-off in turn, control the oscillation frequency of tone alternator, make loudspeaker in turn send the sound of two kinds of tones, the electric capacity in circuit can disturb by filtering circuit, makes the clear sound that loudspeaker sends, and circuit structure is simple, element is few, cost is low, is conducive to universal and promotes.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes battery E, switch S, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, first triode VT1, second triode VT2, 3rd triode VT3, the positive pole of the 4th triode VT4 and loudspeaker BY, battery E simultaneously with the emitter-base bandgap grading of the first triode VT1, the first end of the 6th electric capacity C6, the emitter-base bandgap grading of the 4th triode VT4, the first end of the 7th resistance R7 is connected with the emitter-base bandgap grading of the second triode VT2, the collector of the 4th triode VT4 is connected with the first end of loudspeaker BY and the first end of the 5th electric capacity C5 simultaneously, the base stage of the 4th triode VT4 connects the collector of the 3rd triode VT3, the base stage of the 3rd triode VT3 simultaneously with second end of the 5th electric capacity C5, the first end of the 6th resistance R6, second end of the 7th resistance R7 is connected with the first end of the 5th resistance R5, second end of the 5th resistance R5 simultaneously with the collector of the second triode VT2, the first end of the 4th resistance R4, the first end of the 3rd electric capacity C3 is connected with the first end of the 4th electric capacity C4, the base stage of the second triode VT2 is connected with the first end of the second resistance R2 and the first end of the first electric capacity C1 simultaneously, the base stage of the first triode VT1 is connected with the first end of the 3rd resistance R3 and second end of the 4th electric capacity C4 simultaneously, with second end of the first electric capacity C1 while of the collector of the first triode VT1, the first end of the second electric capacity C2 is connected with the first end of the first resistance R1, and second end of the second electric capacity C2 connects second end of the 3rd electric capacity C3, second end of the first resistance R1 simultaneously with second end of the second resistance R2, second end of the 3rd resistance R3, second end of the 4th resistance R4 is connected with the first end of the 8th resistance R8, second end of the 8th resistance R8 simultaneously with second end of the 6th resistance R6, the emitter-base bandgap grading of the 3rd triode VT3, second end of loudspeaker BY, second end of the 6th electric capacity C6 is connected with the first end of switch S, and the second end of switch S connects the negative pole of battery E.
Principle of work of the present invention:
As shown in Figure 1: the present invention is made up of two groups of oscillators, first triode VT1 and the second triode VT2 forms free-running multivibrator, 3rd triode VT3 and the 4th triode VT4 forms tone alternator, during free-running multivibrator work, first triode VT1 and the second triode VT2 conducting and cut-off in turn, when the second triode VT2 conducting, 5th resistance R5 and the 7th resistance R7 is in parallel, releasing in parallel when second triode VT2 ends, thus control the oscillation frequency of tone alternator, so, loudspeaker BY just sends the sound of two kinds of tones in turn, second electric capacity C2 and the 3rd electric capacity C3 has isolated the pulse that tone alternator delivers to free-running multivibrator, if there is no the second electric capacity C2 and the 3rd electric capacity C3, the frequency of multivibrator will change, unwanted tone will be there is in loudspeaker BY.
Claims (1)
1. a family expenses alliteration doorbell circuit, is characterized in that: comprise battery, switch, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first triode, second triode, 3rd triode, 4th triode and loudspeaker, the positive pole of described battery simultaneously with the emitter-base bandgap grading of described first triode, the first end of described 6th electric capacity, the emitter-base bandgap grading of described 4th triode, the first end of described 7th resistance is connected with the emitter-base bandgap grading of described second triode, the collector of described 4th triode is connected with the first end of described loudspeaker and the first end of described 5th electric capacity simultaneously, the base stage of described 4th triode connects the collector of described 3rd triode, the base stage of described 3rd triode simultaneously with the second end of described 5th electric capacity, the first end of described 6th resistance, second end of described 7th resistance is connected with the first end of described 5th resistance, the second end of described 5th resistance simultaneously with the collector of described second triode, the first end of described 4th resistance, the first end of described 3rd electric capacity is connected with the first end of described 4th electric capacity, the base stage of described second triode is connected with the first end of described second resistance and the first end of described first electric capacity simultaneously, the base stage of described first triode is connected with the first end of described 3rd resistance and the second end of described 4th electric capacity simultaneously, with the second end of described first electric capacity while of the collector of described first triode, the first end of described second electric capacity is connected with the first end of described first resistance, and the second end of described second electric capacity connects the second end of described 3rd electric capacity, the second end of described first resistance simultaneously with the second end of described second resistance, second end of described 3rd resistance, second end of described 4th resistance is connected with the first end of described 8th resistance, the second end of described 8th resistance simultaneously with the second end of described 6th resistance, the emitter-base bandgap grading of described 3rd triode, second end of described loudspeaker, second end of described 6th electric capacity is connected with the first end of described switch, and the second end of described switch connects the negative pole of described battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618260.5A CN104318686A (en) | 2014-11-05 | 2014-11-05 | Household double-sound doorbell circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618260.5A CN104318686A (en) | 2014-11-05 | 2014-11-05 | Household double-sound doorbell circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104318686A true CN104318686A (en) | 2015-01-28 |
Family
ID=52373910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410618260.5A Pending CN104318686A (en) | 2014-11-05 | 2014-11-05 | Household double-sound doorbell circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104318686A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864275A (en) * | 1988-05-09 | 1989-09-05 | General Signal Corporation | Solenoid operated doorbell |
| CN202632439U (en) * | 2012-03-12 | 2012-12-26 | 马志平 | Double-tone doorbell without cell |
| CN204242300U (en) * | 2014-11-05 | 2015-04-01 | 成都中远信电子科技有限公司 | A kind of family expenses alliteration doorbell circuit |
-
2014
- 2014-11-05 CN CN201410618260.5A patent/CN104318686A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864275A (en) * | 1988-05-09 | 1989-09-05 | General Signal Corporation | Solenoid operated doorbell |
| CN202632439U (en) * | 2012-03-12 | 2012-12-26 | 马志平 | Double-tone doorbell without cell |
| CN204242300U (en) * | 2014-11-05 | 2015-04-01 | 成都中远信电子科技有限公司 | A kind of family expenses alliteration doorbell circuit |
Non-Patent Citations (2)
| Title |
|---|
| 付蔚，董世华: "《电子工艺基础（第2版）》", 31 August 2014, article "1.2.1电容的作用", pages: 14 * |
| 陈有卿: "《晶体管实验电路300例》", 31 January 2006, article "例7.双音调电子门铃（2）", pages: 5-6 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |