CN201927337U - Electronic lark - Google Patents
Electronic lark Download PDFInfo
- Publication number
- CN201927337U CN201927337U CN2010206631071U CN201020663107U CN201927337U CN 201927337 U CN201927337 U CN 201927337U CN 2010206631071 U CN2010206631071 U CN 2010206631071U CN 201020663107 U CN201020663107 U CN 201020663107U CN 201927337 U CN201927337 U CN 201927337U
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- CN
- China
- Prior art keywords
- multivibrator
- circuit
- lark
- capacitor
- light
- 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.)
- Expired - Fee Related
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- Road Signs Or Road Markings (AREA)
Abstract
The utility model discloses an electronic lark, which comprises a power source and a power switch. The power source is connected with three circuits in parallel, a first circuit is connected with a speaker and a push tube in series, a second circuit is connected with a multivibrator and a capacitor C2, the multivibrator is connected to an input end of the push tube through a resistor R2, and a third circuit is connected with a resistor R1, a light-sensitive resistor and a capacitor C1. Utilizing the characteristic of photoinduced conduction of semiconductors, the resistance value of the light-sensitive resistor various along with intensity of irradiating light, and charge and discharge time constant of the multivibrator can be changed so as to change frequency of the multivibrator by means of the light sensitivity, and the frequency signal of the multivibrator is current limited by the R2 , so that a low power tube can be driven and various birdcalls can be given out through the speaker.
Description
Technical field
The utility model belongs to the singlechip technology field, relates to a kind of electronics lark.
Background technology
Usually we can appreciate the sound that the nature bird cries by tape or CD, and the sentiment that can mould the people is like this loosened people's mood.Yet adopt the form of tape or CD to play, its tweedle configures in advance, and what can't change sends tweedle.
Summary of the invention
The purpose of this utility model provides a kind of electronics lark, can be by the sound of bright strength control broadcast.
The technical solution adopted in the utility model is, a kind of electronics lark comprises power supply and power switch, and power supply is parallel with three circuit, and the first via is in series with loudspeaker and little promotion pipe; The second the tunnel is connected with multivibrator and capacitor C
2, multivibrator also passes through resistance R
2Be connected to the input end of little promotion pipe; Third Road is in series with resistance R
1, photoresistance and capacitor C
1
Electronics lark of the present utility model, photoresistance utilize semi-conductive photic conductive characteristic, and its resistance changes with the irradiation light intensity, utilize this light sensitive characteristic, can change the charge and discharge time constant of multivibrator, finally change the multi-harmonic-oscillations frequency, the frequency signal of multivibrator is through R
2After the current limliting, drive low power tube and send changeable tweedle by loudspeaker.
Description of drawings
Fig. 1 is the circuit diagram of the utility model electronics lark.
Among the figure, 1. multivibrator, 2. photoresistance, 3. loudspeaker, 4. power supply, 5. little promotion pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The circuit structure of the utility model electronics lark as shown in Figure 1, comprises power supply 4 and power switch SA, and power supply 4 is parallel with three circuit, and one the tunnel is in series with loudspeaker 3 is connected with multivibrator 1 and capacitor C with little promotion pipe 5, the second tunnel
2, multivibrator 1 is a core with time base circuit 555; Multivibrator 1 also passes through resistance R
2Be connected to the input end of little promotion pipe 5.Third Road is in series with resistance R
1, photoresistance 2 and capacitor C
1
The utility model electronics lark, in 555 charging and discharging circuit, be connected in series one group of photoresistance 2, photoresistance 2 utilizes semi-conductive photic conductive characteristic, its resistance changes with the irradiation light intensity, utilize this light sensitive characteristic, can change the charge and discharge time constant of multivibrator 1, finally change the multi-harmonic-oscillations frequency, the frequency signal of multivibrator 1 is through R
2After the current limliting, drive low power tube 5 and send changeable tweedle by loudspeaker 3.
The circuit of the utility model electronics lark is the multivibrator that core is formed with time base circuit 555, can especially under treacherous neon bulb irradiation, can send tweedle fluctuated, that tone is changeable under different illumination, and its sound change is infinite.
Claims (1)
1. an electronics lark is characterized in that, comprises power supply (4) and power switch, and described power supply (4) is parallel with three circuit, and the first via is in series with loudspeaker (3) and little promotion pipe (5); The second the tunnel is connected with multivibrator (1) and capacitor C
2, multivibrator (1) also passes through resistance R
2Be connected to the input end of described little promotion pipe (5); Third Road is in series with resistance R
1, photoresistance (2) and capacitor C
1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631071U CN201927337U (en) | 2010-12-16 | 2010-12-16 | Electronic lark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631071U CN201927337U (en) | 2010-12-16 | 2010-12-16 | Electronic lark |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201927337U true CN201927337U (en) | 2011-08-10 |
Family
ID=44431175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206631071U Expired - Fee Related CN201927337U (en) | 2010-12-16 | 2010-12-16 | Electronic lark |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201927337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390401A (en) * | 2013-08-09 | 2013-11-13 | 何林 | High-loudness buzzer |
-
2010
- 2010-12-16 CN CN2010206631071U patent/CN201927337U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390401A (en) * | 2013-08-09 | 2013-11-13 | 何林 | High-loudness buzzer |
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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: 20110810 Termination date: 20111216 |