CN2041828U - Electronic photoacoustic metronome - Google Patents

Abstract

The utility model discloses an electronic acoustooptic metronome. An oscillation signal with adjustable frequency is generated by an oscillation circuit; the oscillation circuit also drives a luminous tube, and a sonic frequency oscillation circuit to work synchronously, and sound, light which shows the speed of rhythm is emitted. The oscillation circuit also adopts a ring counter whose digit is changeable to make the character of the 2/4 beat, the 3/4 beat, and the 4/4 beat be displayed by three luminous tubes. Thus, the electronic acoustooptic metronome which is suitable for music beginners can replace the older generation of products, with the advantages of no mechanical wear, long service life, low cost, and easy maintenance.

Description

Electronic photoacoustic metronome

A kind of electronic acoustooptic metronome belongs to the electroacoustic field.

The metronome that is being extensive use of at present is the mechanical type metronome, this metronome is the cost height not only, fragile, and the form of expression is single, the sound that can only send different rhythm tempos can't embody 2/4 and clap, the different characteristic that 3/4 bat and 4/4 breath-group are clapped, its work is invalid with regard to almost becoming when musical instrument sound is very big.

The metronomic weak point of mechanical type was custom-designed in the past in order to solve exactly for the electronic acoustooptic metronome that the utility model proposes, it is sent the tempo signal of adjustable speed by electronic circuit, this tempo signal can make loudspeaker send rhythm sound on the one hand, make lumination of light emitting diode show rhythm tempo and demonstration 2/4 bat on the other hand, 3/4 claps, the different characteristic that 4/4 breath-group is clapped.

Accompanying drawing 1 is this metronome internal circuit schematic diagram, and accompanying drawing 2 is internal circuit theory diagrams, and accompanying drawing 3 is metronomic outside drawings, and the contrast accompanying drawing describes its structure and principle of work in detail below.

As shown in Figure 2, the metronome internal circuit comprises oscillator, ring counter, driver, display, gate circuit, audio frequency oscillator and amplifier, wherein oscillator output is divided into two-way, one the road delivers to the ring counter low level, audio frequency oscillator, amplifier are sent to loudspeaker output by gate circuit in another road, ring counter counting figure place is adjustable, is 2,3 or 4. The oscillator signal of oscillator is leaded up to the starting of oscillation of gate circuit Synchronization Control audio frequency oscillator during work, make loudspeaker send the metronome synchronous with oscillator signal, ring counter is triggered on another road successively, everybody overturns successively to make it, thereby make display send the light of this successively upset information of reaction, the difference of the figure place that arranges along with counter, display can show 2/4 claps, 3/4 claps and 4/4 different characteristic of clapping. The implementation circuit theory is as described below.

In accompanying drawing 1, BG _0-1And BG _0-2Constitute self-excited oscillator, BG _I-1And BG _I-2(i=1～4) constitute four trigger flip-flop, and they are by being connected on the BG of each trigger _I-2Collector and BG _{(i+1)-2(i=1～3)}Capacitor C i(i=1 between base stage～3) cascade constitutes counter; Base stage is by resistance R i-1(i=1～4) be connected to BG _I-1Four BG of collector _I-3Constitute driver; Can be connected to BG respectively _I-3Each light emitting diode D of collector ₁～D ₉Constitute display; Work in the BG of on off state ₆Constitute gate circuit; BG _5-1, BG _5-2Constitute the positive feedback audio frequency oscillator, R is passed through in its output ₃, C ₃After be connected to amplifier, export to loudspeaker at last.Wherein the output terminal of oscillator is BG _0-2Collector passes through R ₁After be divided into two-way, lead up to C ₀With four BG in the ring counter _I-2Emitter passes through R after linking to each other ₄Ground connection, R is passed through on another road ₂Afterwards and be serially connected with R ₄BG with reverse voltage E ₆Base stage link to each other; BG ₆Collector and BG _5-2Emitter links to each other; BG _I-1Emitter all connect together and pass through R ₅Ground connection; K ₁Be nine cuttves, three throw switches, the j switch is with K _1-jThe operator end is represented in expression, 0 end of each layer switch, and 1,2,3 is three and pays cutter-contact point, three BG _I-2The collector of (i=2,3,4) is connected to K respectively _1-1K(k=1,2,3) end, K _1-10 end pass through C ₄With BG _1-2Base stage links to each other; K _1-20 end, 2 ends, 3 ends link to each other with the power end a of first and second grade trigger, the power end b of third level trigger and the power end c of third level trigger respectively; D ₁～D ₉Negative terminal link to each other simultaneously with power positive end, anode successively respectively with K _1-51,2,3 ends, K _1-61,2,3 ends, K _1-72,3 ends, K _1-83 ends link to each other; BG _0-1Be connected to Tricolor LED D on the collector ₀, two negative terminal is while and K respectively _1-31,3 end and K _1-32 ends, K _1-43 ends link to each other; BG _0-2Thereby the potentiometer Rw scalable oscillator frequency of operation on the base stage changes the rhythm speed; D ₁～D ₃Be red luminotron, D ₄～D ₇And D ₉Be green, D ₈For orange.Introduce so no longer describe in detail about all having in the connection of oscillator and trigger and the general book of fundamental diagram.

Below we analyze the metronomic course of work, work as K ₁0 end when linking to each other with 1 or 2 or 3 ends, C is passed through in the output of second or the 3rd or the 4th trigger ₄Link to each other with the input end of first trigger, so promptly become two or three-digit or 4 ring counters, can represent respectively that at last 2/4,3/4,4/4 breath-group plays bat, we establish its and constitute 2 digit counters earlier.Work as power connection, oscillator is promptly started working, and it makes D ₀Send a kind of light by oscillator frequency, as ruddiness (two kinds of light are green, orange in addition), oscillator is exported one the tunnel and is passed to BG ₆Base stage is at ordinary times because of the effect BG of reverse voltage E ₆End, the audio frequency oscillator failure of oscillation, when pulse high level arrives, BG ₆Be conducting, the audio frequency oscillator starting of oscillation, output signal is amplified the back and is become metronome from loudspeaker, when pulses low arrives, BG ₆Recovery ends, and so just can make sound and the oscillator synchronization sent; Another road output passing through of oscillator C ₀After become a string upper punch or down towards spike pulse, we suppose BG earlier _1-1Conducting, BG _1-2End, at this moment BG _1-3End D ₁Not luminous working as under first, arrive BG towards spike pulse _1-2Even emitter BG _1-2Become conducting by ending, its collector potential descends, and makes BG _1-1End, thereby make BG _1-3Conducting, D ₁Luminous, also make BG simultaneously towards spike pulse down at this moment _2-2Conducting once, but because BG _1-2Collector potential passes through C by the step of high step-down ₁After promptly become under one towards spike pulse and trigger BG _2-2Base stage ends it, at this moment BG _2-1Conducting, thereby BG _2-3End D ₂Not luminous, when next down when spike pulse arrives, its BG to ending _2-2Work, thereby make its conducting BG _2-1End BG _2-3Conducting, D ₄Luminous, BG _2-2Following step signal on the collector is through C ₄After become and down make BG towards spike pulse _1-2End BG _1-1Conducting, D ₁Not luminous, D like this ₁, D ₄The power that replaces in luminous expression 2/4 bat changes,, like this, with K ₁Be access to different contacts, luminotron sends the different beat of red, green or red, green, green or red, green, orange, green expression successively, and can change the rhythm speed by the adjusting of Rw, thereby reaches the effect of sound, the demonstration of light beat.

Accompanying drawing 3 is this metronomic outside drawings, and among the figure, internal circuit 10 is placed in the shell 1, the 2 luminotron D for expression 2/4 bat ₁, D ₄, 3 luminotron D for expression 3/4 bat ₂, D ₅, D ₇, 4 luminotron D for expression 4/4 bat ₃D ₆, D ₈, D ₉, 5 is D ₀, 6 is loudspeaker, and 7 is Rw, and 8 is K ₁, 9 is K ₂, the K here ₂Be the K in the circuit diagram _2-1, K _2-2It can be controlled the power supply of audible segment or luminous component respectively and supply with, thereby both are worked simultaneously or works respectively, to adapt to different needs.

By as seen above-mentioned, the electronic acoustooptic metronome that the utility model proposes can not only send metronome and play the effect same with mechanical metronome, and rhythm tempo can be used up and show, it is also advantageous in that it can come out 2/4 3/4,4/4 character representation of clapping with a plurality of luminotrons, therefore intuitive, clear, diversified to the expression mode of beat, very suitablely begin to learn music person and use.

Claims (3)

1, a kind of electronic acoustooptic metronome comprises shell 1 and internal circuit 10, it is characterized in that:

1,1, BG _0-1And BG _0-2Constitute oscillator,

1,2, BG _I-1And BG _I-2(i=1～4) constitute four trigger flip-flop, and they are by being connected on each BG _I-2Collector and next stage BG _(i+1)-2Capacitor C between base stage _j(j=1～3) constitute counter,

1,3, base stage is passed through resistance R _I-1(i=1～4) are connected to BG _I-1Four BG of collector _I-2Constitute driver,

1,4, can be connected to BG respectively _I-3The D of collector ₁～D ₉Constitute display,

1,5, works in the BG of on off state ₆Constitute gate circuit,

1,6, BG _5-1, BG _5-2Constitute the positive feedback audio frequency oscillator, R is passed through in its output ₃, C ₃After be connected to amplifier output;

Wherein,

1,7, BG in the oscillator _0-2Collector passes through R ₁After lead up to C ₀With four BG in the counter _I-2Emitter passes through R after linking to each other ₄Ground connection, R is passed through on another road ₂Afterwards and be serially connected with R ₄BG with reverse voltage E ₆Base stage link to each other;

1,8, BG _I-1Emitter all connect together and pass through R ₅Ground connection;

1,9, BG ₆Collector and BG _5-2Emitter links to each other: three BG _I-2The collector of (i=2,3,4) is connected to K respectively _1-1R (R=1,2,3) end, K _1-10 end pass through C ₉Be connected to BG _1-2Base stage;

1,10, K _1-20,2,3 ends link to each other with a, b, 3 of c respectively;

1,11, D ₁～D ₉Anode links to each other with power positive end simultaneously, negative terminal successively respectively with K _1-51,2,3 ends, K _1-61,2,3 ends, K _1-72,3 ends, K _1-83 ends link to each other;

1,12, BG _0-1Be connected to three-colour light-emitting pipe D on the collector ₀, two negative terminal is while and K respectively _1-31,3 end and K _1-32 end K _1-43 ends link to each other.

2, electronic acoustooptic metronome according to claim 1 is characterized in that:

BG in the internal circuit 10 _0-2Be connected to potentiometer Rw on the base stage.

3, acousto-optic metronome as claimed in claim 1 or 2 is characterized in that:

In the internal circuit 10, D ₁～D ₉D in the luminotron ₁～D ₃Be redness, D ₄～D ₇And D ₉Be green, D ₈For orange.

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