CN2735499Y

CN2735499Y - Singing circuit capable of generating soft music sound

Info

Publication number: CN2735499Y
Application number: CN 200420088579
Authority: CN
Inventors: 刘秀红
Original assignee: Guangzhou Kinte Industrial Co Ltd
Current assignee: Guangzhou Kinte Industrial Co Ltd
Priority date: 2004-09-24
Filing date: 2004-09-24
Publication date: 2005-10-19
Anticipated expiration: 2014-09-24

Abstract

The utility model relates to a singing circuit capable of generating soft music sound, comprising a triode N3, a common buzzer BUZZ, a triode N1, a triode P1, a ceramic dielectric capacitance C1 and resistance R1, R2, R3, R4. When the IO output opening pin of a single chip computer of resistance R1, R6 are respectively connected to output high level, the buzzer is working and sends out sound; when the IO output opening pin of the single chip computer of one end of the resistance R1 is connected to output low level, the triode N1 and the triode P1 are in cut-off state, the electricity of the buzzer is supplied by an RC circuit, and the capacitance C1 is in discharge condition to cut down the electric voltage gradually for the buzzer; then the sound of the buzzer becomes small gradually to realize the aftersound effect.

Description

Can produce the buzz circuit of soft musical sound

Technical field

The utility model relates to a kind of buzz circuit, especially relates to a kind of buzz circuit that produces soft musical sound.

Background technology

In the electrical appliance control of the being in device, often use the response prompting sound that auditory tone cues electric circuit is used for representing man-machine interaction.These auditory tone cues electric circuit (see figure 1)s commonly used are normally fairly simple, and by two resistance R 5, R6, wherein resistance R 6 connects the BUZ delivery outlet of single-chip microcomputer, a triode N3, and a common hummer BUZZ forms.The work ultimate principle of circuit is when the single-chip microcomputer IO of connecting resistance R6 one end delivery outlet pin output high level, hummer work, sound, when the output pin output low level, hummer quits work at once, closes sound, like this one open-one close, the sound that hummer is sent is more stiff, stiff, lacks attractive force.

The utility model content

The purpose of this utility model is to provide a kind of buzz circuit that produces soft musical sound.

The purpose of this utility model can realize by following technical measures: comprise triode N3 and common hummer BUZZ, the collector of triode N3 connects the link of common hummer BUZZ, also comprise triode N1, P1, Leaded Ceramic Disc Capacitor C1 and resistance R 1, R2, R3, R4, another link of common hummer BUZZ is connected with the collector of triode P1, simultaneously through resistance R 4, Leaded Ceramic Disc Capacitor C1 ground connection, the emitter of triode P1 connects operating voltage, the base stage of triode P1 connects operating voltage through resistance R 3, connect the collector of triode N1 through resistance R 2, the grounded emitter of triode N1, the base stage of triode N1 is through resistance R 1 external control incoming level.

Whole control process of the present utility model makes hummer send soft interesting to listen to sound, reaches certain music effect.This circuit is simple, cost is low, be easy to realization, makes the people fresh and new, can be applicable to the auditory tone cues in the household electrical appliance controller.

Description of drawings

Fig. 1 is existing common buzz circuit schematic diagram;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

As shown in Figure 2, comprise triode N3, common hummer BUZZ, triode N1, P1, Leaded Ceramic Disc Capacitor C1 and resistance R 1, R2, R3, R4, the collector of triode N3 connects the link of common hummer BUZZ, another link of common hummer BUZZ is connected with the collector of triode P1, simultaneously through resistance R 4, Leaded Ceramic Disc Capacitor C1 ground connection, the emitter of triode P1 connects operating voltage, the base stage of triode P1 connects operating voltage through resistance R 3, connect the collector of triode N1 through resistance R 2, the grounded emitter of triode N1, the base stage of triode N1 is through resistance R 1 external single-chip microcomputer IO delivery outlet.

When the single-chip microcomputer IO delivery outlet pin output high level that connects resistance R 1, R6 respectively, hummer work, sound takes place, when the single-chip microcomputer IO of connecting resistance R1 one end delivery outlet pin output low level, triode N1, P1 are in cut-off state, and hummer is by the RC circuit supply, capacitor C 1 is in discharge condition, supply with the voltage of hummer and cut down gradually, the sound of hummer is diminished gradually, realize DEC decay.

Claims

1, a kind of buzz circuit that produces soft musical sound, comprise triode N3 and common hummer BUZZ, the collector of triode N3 connects the link of common hummer BUZZ, it is characterized in that: also comprise triode N1, P1, Leaded Ceramic Disc Capacitor C 1 and resistance R 1, R2, R3, R4, another link of common hummer BUZZ is connected with the collector of triode P1, simultaneously through resistance R 4, Leaded Ceramic Disc Capacitor C1 ground connection, the emitter of triode P1 connects operating voltage, the base stage of triode P1 connects operating voltage through resistance R 3, connect the collector of triode N1 through resistance R 2, the grounded emitter of triode N1, the base stage of triode N1 is through resistance R 1 external control incoming level.

2, the buzz circuit that produces soft musical sound according to claim 1 is characterized in that: described resistance R 1 external may command is exported the single-chip microcomputer delivery outlet of high or low level.