Fire alarm sensing small night lamp circuit
A technology of induction circuits and night lights, which is applied in the layout of electric light circuits, electric light sources, lighting devices, etc., can solve problems such as inability to intelligently distinguish audio signals
Active Publication Date: 2013-10-09
王亚明
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Problems solved by technology
Unable to intelligently identify audio signals
Method used
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0011] Such as figure 1 As shown, the fire alarm induction night light circuit is characterized in that it includes a power supply circuit, a central control circuit, an audio signal induction circuit and a light emitting circuit. The audio signal induction circuit and the light emission circuit are respectively connected to and controlled by the central control circuit. The above-mentioned power supply circuit supplies power to the central control circuit. The audio signal sensing circuit includes a microphone, resistors R9 to R15, transistor Q3, transistor Q4, capacitor C8 and capacitor C9. One end of the microphone is grounded, and the other end is connected to the transistor through capacitor C9. The base of Q4, one end of the resistor R15 is connected to a 5V power supply, and the other end is connected between the microphone and the capac...
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The invention discloses a fire alarm sensing small night lamp circuit. The fire alarm sensing small night lamp circuit comprises a power circuit, a central control circuit, an audio signal sensor circuit and a light-emitting circuit. The audio signal sensor circuit and the light-emitting circuit are connected with the central control circuit respectively and controlled by the central control circuit. The power circuit supplies power to the central control circuit. A small night lamp which is used for sensing a fire alarm can serve as a common lighting fixture and can be automatically turned on at night or places where light is dim, and the small night lamp also has a fire alarm prompting function and the function of being capable of working normally under the circumstance of a power failure on the basis of the existing simple illumination function. When a fire breaks out and a fire alarm is sounded, the small night lamp is in a highlighted state immediately so as to play a role in fire alarm prompting and fire protection illuminating; a microphone is used for picking up a 2800HZ-3800HZ fire alarm sound frequency audio signal, the audio signal is transmitted to an intelligent chip after being filtered, a high-low electrical level is output, and an LED is driven by a peripheral amplifying circuit to emit light; the fire alarm sensing small night lamp circuit only can detect fire alarm sound frequency and will not be triggered by other sounds to cause false operations.
Description
technical field [0001] The invention relates to a fire alarm induction small night light circuit. Background technique [0002] Existing light-controlled or sound-controlled human body induction night lights are only lit at night or in dark places, or when there is an action sound within the range of 3 meters, and only play the role of lighting. Intelligent discrimination cannot be performed on audio signals. Contents of the invention [0003] In view of the above technical problems, the present invention proposes a fire alarm induction night light circuit. [0004] In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows: [0005] The fire alarm sensing night light circuit includes a power supply circuit, a central control circuit, an audio signal sensing circuit and a light emitting circuit. The audio signal sensing circuit and the light emitting circuit are respectively connected to and controlle...
Claims
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IPC IPC(8): H05B37/02G08B5/36
Inventor 王亚明
Owner 王亚明