CN214175234U - Doorbell sound production circuit - Google Patents
Doorbell sound production circuit Download PDFInfo
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- CN214175234U CN214175234U CN202120319270.4U CN202120319270U CN214175234U CN 214175234 U CN214175234 U CN 214175234U CN 202120319270 U CN202120319270 U CN 202120319270U CN 214175234 U CN214175234 U CN 214175234U
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- power supply
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- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
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Abstract
The utility model relates to a doorbell technical field relates to a doorbell sound production circuit. It includes: the power supply unit is provided with a PWM control signal output end and a power supply output end; the horn circuit is provided with a power supply input end; the PWM control circuit further comprises an adjusting circuit, wherein the adjusting circuit comprises a switching tube Q1, and the control end of the switching tube Q1 is connected with the PWM control signal output end through a resistor R1; the input end of the switching tube Q1 is connected with the power supply output end through a capacitor C1, and the input end of the switching tube Q1 is connected with the power supply input end through a resistor R3; the output terminal of the switching tube Q1 is grounded. The utility model discloses a set up adjusting circuit, combine electrical unit to make the input mains voltage of loudspeaker become the gradual change nature, loudspeaker sound production is no longer monotonous one become unchangeable.
Description
Technical Field
The utility model relates to a doorbell technical field relates to a doorbell sound production circuit.
Background
In present intelligent video doorbell system, the sound production circuit of doorbell generally controls loudspeaker sound production by the PWM control signal that the power generated, because PWM control signal's frequency is invariable to and the mains voltage who provides loudspeaker also keeps unchangeable, make loudspeaker's sound production rhythm one and unchangeable, listen for a long time after, sound is very dull, is unfavorable for physical and mental health.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide a doorbell sound production circuit, this doorbell sound production circuit changes the sound production of doorbell through changing frequency and supply voltage.
A doorbell sounding circuit, comprising:
the power supply unit is provided with a PWM control signal output end and a power supply output end;
the horn circuit is provided with a power supply input end;
the PWM control circuit further comprises an adjusting circuit, wherein the adjusting circuit comprises a switching tube Q1, and the control end of the switching tube Q1 is connected with the PWM control signal output end through a resistor R1; the input end of the switching tube Q1 is connected with the power supply output end through a capacitor C1, and the input end of the switching tube Q1 is connected with the power supply input end through a resistor R3; the output terminal of the switching tube Q1 is grounded.
Further, the power supply unit includes a power supply control unit, and the power supply control unit is: and a single chip microcomputer.
Further, the switch tube includes a triode or a MOS tube.
Further, the input terminal of the resistor R3 is connected to ground through the resistor R2.
Furthermore, the loudspeaker circuit includes loudspeaker and the audio amplifier circuit who is connected with loudspeaker, and power input end is connected with audio amplifier circuit.
The utility model has the advantages that: the utility model discloses a set up adjusting circuit, combine electrical unit to make the input mains voltage of loudspeaker become the gradual change nature, loudspeaker sound production is no longer monotonous one become unchangeable.
Drawings
Fig. 1 is a circuit diagram of the present embodiment.
The reference signs are:
1-a power supply unit; 2-a regulation circuit; and 3, an audio amplifying circuit.
Detailed Description
The following detailed description of the present invention is made with reference to the accompanying drawings. As shown in fig. 1.
Example 1: a doorbell sounding circuit, comprising:
the power supply unit 1 is provided with a PWM control signal output end and a power supply output end;
the horn circuit is provided with a power supply input end;
the PWM control circuit further comprises an adjusting circuit 2, wherein the adjusting circuit 2 comprises a switching tube Q1, and the control end of the switching tube Q1 is connected with the PWM control signal output end through a resistor R1; the input end of the switching tube Q1 is connected with the power supply output end through a capacitor C1, and the input end of the switching tube Q1 is connected with the power supply input end through a resistor R3; the output terminal of the switching tube Q1 is grounded.
When the technical scheme works, the PWM control signal output by the power supply unit 1 is used for controlling the on-off between the input end and the output end of the switching tube Q1, in the actual working process, the maximum voltage of the PWM control signal is 3.3V, the minimum voltage is 0, when the voltage of the PWM control signal is at a wave crest, the switching tube Q1 is conducted, and the input end of the power supply is grounded; when the voltage of the PWM control signal is in a wave valley, the switching tube Q1 is cut off, the power input end has power input, and the loudspeaker works; thus, under the PWM control signal, the horn is in intermittent sounding. In addition to intermittent sounding, in order to ensure that the sounding size of the loudspeaker is also changed, the technical scheme also adjusts the output power supply voltage of the power supply output end; in specific implementation, the output end of the PWM control signal outputs control signals with two frequencies, the power supply output by the power supply output end also has two different power supply voltages correspondingly, when the frequency of the PWM control signal is lower frequency, the power supply output by the power supply output end is low level power supply, otherwise, when the frequency of the PWM control signal is higher frequency; during operation, the frequency of the PWM control signal is switched (at a certain frequency), and during the switching process, the voltage of the capacitor C1 is affected, such as: when the low-level power supply is switched to the high-level power supply, the capacitor C1 is switched to a charging state, and the power supply voltage supplied to the power supply input end is gradually increased from the low-level voltage to the high-level voltage; when the high-level power supply is switched to the high-level power supply, the capacitor C1 is switched to a discharging state, and simultaneously, the power supply provided for the power supply input end is gradually reduced and gradually reduced from the high level to the low level voltage; the power supply of the horn circuit is always in the fluctuation process of the curve in the switching process, the sound is gradually increased or decreased and is matched with the interval to form sound which is not monotonous any more, and the body and mind health is facilitated.
Further, the power supply unit includes a power supply control unit, and the power supply control unit is: and a single chip microcomputer. The type of the single chip microcomputer can be as follows: MC 3006250.
The power supply unit 1 adopts a single chip microcomputer as a control unit, and is simple and convenient.
Further, the switch tube includes a triode or a MOS tube.
In specific implementation, the switching tube may be configured as a triode, a MOS tube, or other electronic switching tubes.
Further, the input terminal of the resistor R3 is connected to ground through the resistor R2.
Further, the horn circuit includes a horn and an audio amplifier circuit 3 connected to the horn, and the power input terminal is connected to the audio amplifier circuit 3.
In the actual working process, some occasions need to properly amplify the working volume of the loudspeaker, so the technical scheme is also provided with the audio amplification circuit 3.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the present description should not be interpreted as a limitation to the present invention.
Claims (5)
1. A doorbell sounding circuit, comprising:
the power supply unit is provided with a PWM control signal output end and a power supply output end;
the horn circuit is provided with a power supply input end;
the method is characterized in that: the PWM control circuit further comprises an adjusting circuit, wherein the adjusting circuit comprises a switching tube Q1, and the control end of the switching tube Q1 is connected with the PWM control signal output end through a resistor R1; the input end of the switching tube Q1 is connected with the power supply output end through a capacitor C1, and the input end of the switching tube Q1 is connected with the power supply input end through a resistor R3; the output terminal of the switching tube Q1 is grounded.
2. A doorbell sounding circuit according to claim 1, characterized in that: the power supply unit comprises a power supply control unit, and the power supply control unit is as follows: and a single chip microcomputer.
3. A doorbell sounding circuit according to claim 1, characterized in that: the switch tube comprises a triode or a MOS tube.
4. A doorbell sounding circuit according to claim 1, characterized in that: the input terminal of the resistor R3 is connected to ground through a resistor R2.
5. A doorbell sounding circuit according to claim 1, characterized in that: the loudspeaker circuit comprises a loudspeaker and an audio amplification circuit connected with the loudspeaker, and the power input end is connected with the audio amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120319270.4U CN214175234U (en) | 2021-02-05 | 2021-02-05 | Doorbell sound production circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120319270.4U CN214175234U (en) | 2021-02-05 | 2021-02-05 | Doorbell sound production circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214175234U true CN214175234U (en) | 2021-09-10 |
Family
ID=77595157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120319270.4U Active CN214175234U (en) | 2021-02-05 | 2021-02-05 | Doorbell sound production circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214175234U (en) |
-
2021
- 2021-02-05 CN CN202120319270.4U patent/CN214175234U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 10, Baihao Century Road, Houjie, Dongguan, Guangdong 523000 Patentee after: Dongguan Roms Intelligent Technology Co.,Ltd. Country or region after: China Address before: 523000 1st and 2nd floors of No.34 Dehe Road, Juqi community, Humen Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN CITY ROMS SMART HOME Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |