JPH0223874B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention produces a melody,
The present invention relates to an electronic sound generator that sequentially generates different electronic sounds such as animal sounds and music box sounds.

(Prior Art) Conventionally, devices have been used in various devices that turn on or off a switch by sensing an external sound, rotate or stop a motor, or turn on or off a lamp. It is applied.

(Problem to be solved by the invention) However, in the past, the operation was relatively simple, such as simply turning the power on and off.
The problem was that its application functions were narrow.

On the other hand, in the past, there were devices that produced electronic sounds with a certain melody, but these devices had a switching function that could be operated manually or mechanically, and were relatively simple in terms of functionality.

Therefore, the present invention provides an electronic sound generator that does not have the simple functions described above, but has expanded functions, is more interesting, and has increased applicability.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a sound sensing section that detects an external sound, and a melody, and an electronic sound generating section that sequentially generates different electronic sounds such as animal sounds and music box sounds, and the sound sensing section includes:
A detection amplifier circuit is connected to the output end of the microphone for external sound detection, a one-shot multivibrator circuit for rectangular wave shaping is connected to the output end of this detection amplifier circuit, and a one-shot multivibrator circuit for rectangular wave shaping is connected to the output end of this one-shot multivibrator circuit. A one-shot multivibrator circuit for low waveform shaping that has a CR time constant setting circuit that determines the electronic sound selection and the playing time of the electronic sound is connected, and one output terminal of this one-shot multivibrator circuit is connected to the low A delay circuit for electronic sound identification that delays the waveform signal by a time set by the product of the resistor and the electrolytic capacitor is connected, and the waveform signal is inverted from the H level to the L level at the output terminal of this delay circuit. and a flip-flop circuit for converting an electronic sound by connecting the electronic sound generating section to an output terminal of the flip-flop circuit of the sound sensing section and a one-shot multivibrator circuit having a CR time constant setting circuit. A melody IC that sequentially generates different electronic sounds is connected to the other output terminal of the melody IC.

(Function) By using the above-mentioned technical means, once an external sound is generated by clapping hands or the like, the microphone of the sound sensing section detects this external sound, and then the signal waveform output to this output terminal is detected. The waveform signal is detected and amplified by the detection amplifier circuit, and the waveform signal outputted to the output terminal is shaped into one rectangular wave by the one-shot multivibrator circuit, and then the one-shot multivibrator circuit determines the selection of the first song and the playback time of the song. When the vibrator circuit is activated, the resistance and electrolytic capacitor
A low waveform determined by the CR time constant is obtained at the other output terminal, and then the input terminal of the melody IC inverts from H level to L level.
The melody IC operates and the first melody plays.

Furthermore, when the second external impact sound is played, the sound is also detected by the microphone, and as described above, the one-shot sound is passed through the detection amplifier circuit and the one-shot multivibrator circuit to determine the selection of the first song and the playing time of the song. The low waveform signal that is input to the multivibrator circuit and output to one output terminal of this circuit is input to the delay circuit, and this low waveform signal is input to the delay circuit for a time set by the product of the resistor and the electrolytic capacitor. The waveform signal that is delayed by 10 seconds and output to the output terminal of this delay circuit is input to the flip-flop circuit, which activates the flip-flop circuit and inverts the H level to the L level at the output terminal, and the waveform signal is output as an electronic sound. The melody of the origin
When input to the IC, the melody of the first song stops, the melody of the second song starts, and so on, so that different electronic sounds are generated sequentially.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, the present invention includes a sound sensing section 68 that detects external sounds, and each time the sound sensing section 68 detects an external sound, a different electronic sound such as a melody, an animal's cry, a music box sound, etc. is emitted. It is composed of an electronic sound generating section 61 that sequentially generates electronic sounds.

The sound sensing section 68 first connects resistors 2, 3, and 4 to the output end 67 of the condenser microphone 1 for external sound sensing.
A detection amplifier circuit 6 consisting of a transistor 5 and a transistor 5,
The base of the transistor 5 is connected to the capacitor 7, and the output terminal 8 of the detection amplifier circuit 6 is connected to the resistors 9, 10, 11, 12, 13 and the transistor 1.
One-shot multivibrator circuit 1 for rectangular wave shaping consisting of 4, 15 and an electrolytic capacitor 16
7 is connected to the base of the transistor 15 via a resistor 9. Next, a transistor 1 is connected to the output terminal 18 of this one-shot multivibrator circuit 17.
9a, 20 and resistors 21, 22, 23, 24, 25
A one-shot multivibrator circuit 27 for low waveform shaping, which has a CR time constant setting circuit that determines the selection of the electronic sound and the playing time of the electronic sound, is configured by a transistor 19a and an electrolytic capacitor 26.
is connected to the base of the resistor 19 via a resistor 19. continue,
An output terminal 18 of the one-shot multivibrator circuit 17 is connected through a diode 28 and a resistor 29 in series to an output terminal 31 of a flip-flop circuit 30, which will be described later. Furthermore, resistors 33, 3 are connected to one output terminal 32 of the one-shot multivibrator circuit 27 connected to the collector of the transistor 19a.
3a, an electrolytic capacitor 34, and a transistor 35, a delay circuit 36 for electronic sound identification that delays a waveform signal is connected to the base of the transistor 35 via a resistor 33. Furthermore, this delay circuit 36
A flip-flop circuit 30, which inverts a waveform signal and converts an electronic sound, is connected to the output terminal 43 of the transistor 37, 38 and resistors 39, 40, 41, 42 via the resistor 42 and the emitter of the transistor 38. It is formed like this. In this case, the delay circuit 36 is provided to prevent malfunctions when selecting a song due to external percussion sound input, and the delay circuit is set by the product of the resistor 33 and the electrolytic capacitor 34.

On the other hand, the electronic sound generating section 61 first generates a melody at the output terminal 31 of the flip-flop circuit 30.
IC44 and resistance 45, 46, 47, 48, 49,
50, 51, 52 and capacitors 53, 54, 5
5, 56, 56a, electrolytic capacitor 56b, variable resistor 57, transistors 58, 59, and speaker 6
Connect one end of the melody IC 44 to generate different electronic sounds in sequence. The input terminal 63 of the melody IC 44 is connected to the other output terminal 62 connected to the collector of the transistor 20 constituting the one-shot multivibrator circuit 27.

In addition, the DC power supply connection end 6 of the condenser microphone 1
4 and 65 are commonly connected to the detection amplifier circuit 6, the one-shot multivibrator circuits 17 and 27, the delay circuit 36, the flip-flop circuit 30, and the electronic sound generator 61, as shown in FIG.
Connect the positive side of the DC power supply 66 to the DC power supply connection end 64
Then, the negative side is connected to the DC power supply connection end 65, respectively.

Next, its operation will be explained.

For example, once an external sound is generated by clapping hands, etc., the condenser microphone 1 of the sound sensing section 68 detects this external sound, and the signal waveform (A in FIG. 2) outputted to the output terminal 67 is detected by the detection amplifier circuit 6. When amplified, the output terminal 8 has a waveform as shown in FIG. 2B. This waveform signal is shaped by a one-shot multivibrator circuit 17 into one rectangular wave as shown in FIG. 2C. After shaping the waveform, when the one-shot multivibrator circuit 27, which determines the selection of the first song and the playback time of the song, is activated, the low waveform determined by the CR time constant of the resistor 25 and the electrolytic capacitor 26 (see Fig. 2) is activated. D) is obtained at the other output 62. Then, Melody IC44
The melody IC 44 is activated and the melody of the first song is amplified by the transistors 58, 59, etc., and is sounded by the speaker 60 (Fig. 2H).
reference).

Furthermore, when a second external impact sound is generated, the sound is also detected by the condenser microphone 1, and is input to the one-shot multivibrator circuit 27 via the detection amplifier circuit 6 and the one-shot multivibrator circuit 17 as described above. A waveform signal as shown in FIG. 2D is obtained at one output terminal 32 and is input to the delay circuit 36. This delay circuit 36 is provided to prevent malfunction when selecting a song due to external percussion sound input, and its delay time is set by the product of the resistor 33 and the electrolytic capacitor 34, and the signal waveform is shown in FIG. 2E. As shown, only CR is delayed. Then,
At the output terminal 43, a waveform signal as shown in FIG.
0, the flip-flop circuit 30 is activated and the output terminal 31 inverts the H level to the L level, and when a waveform signal as shown in FIG. The melody of the first song stops and the melody of the second song is played from the speaker 60.

(Effects of the Invention) Therefore, the present invention includes a sound sensing section 68 that detects an external sound, and each time the sound sensing section 68 detects an external sound, it generates a different electronic sound such as a melody, an animal's cry, a music box sound, etc. The sound sensing section 68 includes a detection amplifier circuit 6 connected to the output terminal of the microphone 1 for detecting external sound, and a rectangular wave output terminal connected to the output terminal of the detection amplifier circuit 6. A one-shot multivibrator circuit 17 for shaping is connected, and the output end of the one-shot multivibrator circuit 17 has a CR time constant setting circuit for determining the electronic sound selection and the playing time of the electronic sound. A one-shot multivibrator circuit 27 is connected to one output terminal of the one-shot multivibrator circuit 27, and an electronic sound identification device that delays the low waveform signal by the time set by the product of the resistor and the electrolytic capacitor. Connect a delay circuit for
A flip-flop circuit 30 is connected to the flip-flop circuit 30 that converts the electronic sound by inverting it from the level to the L level.On the other hand, the electronic sound generating section 61 is connected to the output terminal of the flip-flop circuit 30 of the sound sensing section 68, and when the CR and the other output terminal of the one-shot multivibrator circuit 27 having a constant setting circuit.
Melody IC44 that generates different electronic sounds sequentially
Since the microphone 1 of the sound sensing section 68 is formed so that it is connected to the
detects this external sound, and then this output terminal 67
The signal waveform outputted to the output terminal 8 is detected and amplified by the detection amplifier circuit 6, and the waveform signal outputted to the output terminal 8 is amplified by the one-shot multivibrator circuit 17.
After shaping the waveform into a rectangular wave, the one-shot multivibrator circuit 27, which determines the selection of the first song and the playing time of the song, is activated. The waveform is obtained at the other output terminal 62, and then, at the input terminal 63 of the melody IC 44, it is inverted from H level to L level, so the melody
The IC operates and the first melody plays, and then...
When the second external impact sound is played, it is still microphone 1.
detects the sound, and inputs the sound via the detection amplifier circuit 6 and the one-shot multivibrator circuit 17 as described above to the one-shot multivibrator circuit 27, which determines the selection of the first song and the playing time of the song,
The low waveform signal outputted to one output terminal 32 of this circuit 27 is input to the delay circuit 36, and this low waveform signal is transmitted to the delay circuit 36 for a time set by the product of the resistor 33 and the electrolytic capacitor 34. The waveform signal that is delayed and output to the output terminal 43 of the delay circuit 36 is input to the flip-flop circuit 30, so that the flip-flop circuit 30 is activated and inverted from the H level to the L level at the output terminal 31, and the waveform When the signal is input to the melody IC 44 of the electronic sound generating section 61, different electronic sounds are generated in sequence, such as the first melody stops and the second melody is generated, so the external sound is only detected. will automatically start playing an electronic melody. Moreover, once a sound is detected, the one-shot multivibrator circuit 27 with a CR time constant setting circuit will automatically stop the melody after playing the melody for a certain period of time (approximately 15 to 20 seconds). It will be interesting. Also, if the external sound is played twice in succession, the delay circuit 36 and flip-flop circuit 30 stop the previous song (first song) and play the melody of the next song (second song). Can be done. In other words, depending on the number of external sounds, it becomes possible to change the tune of the melody being played, expanding its functions and increasing its applicability.
We will be able to offer something even more interesting.

Furthermore, it is possible to operate at a low voltage, which is the same as the operating voltage of existing melody ICs, which have an operating voltage of 1.5V to 3V, and is very economical because it can be operated with a single AA battery, for example. Of course, by using a single AA battery, it can be operated for a longer period of time. In addition, Melody IC can be used with other Melody ICs on the market.
For example, by replacing it with the sound of an animal,
It is also possible to freely select sounds according to preference, such as music box sounds.

Moreover, since the melody IC 44 is used, it outputs an electronic sound that plays a specific melody, but the sound sensing section 68 can be incorporated into, for example, a traveling toy and connected to the driving section of this traveling toy. Accordingly, a signal for switching a reverse switch to move the traveling toy forward or backward can be generated, and a melody can also be sounded in connection with forward or backward movement, making it highly applicable.

In addition, the flip-flop circuit 3 shown in FIG.
By appropriately increasing 0 and Melody IC44, etc., the electronic sounds to be generated can be made into three or more types according to the ranking, for example, animal sounds, music box sounds, and other electronic sounds. It is also possible to generate three or more different electronic sounds in combination with the number of external sounds.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a waveform diagram showing signal waveforms at each output terminal. 1...Condenser microphone, 2...Resistor, 3...
Resistor, 4... Resistor, 5... Transistor, 6...
Detection amplifier circuit, 7... Capacitor, 8... Output terminal, 9... Resistor, 10... Resistor, 11... Resistor,
12... Resistor, 13... Resistor, 14... Transistor, 15... Transistor, 16... Electrolytic capacitor, 17... One-shot multivibrator circuit, 18... Output end, 19... Resistor, 19a
...Transistor, 20...Transistor, 21
...Resistance, 22...Resistance, 23...Resistance, 24...
... Resistor, 25 ... Resistor, 26 ... Electrolytic capacitor, 27 ... One-shot multivibrator circuit, 28 ... Diode, 29 ... Resistor, 30 ...
...Flip-flop circuit, 31...Output terminal, 32
...Output end, 33...Resistor, 33a...Resistor, 3
4... Electrolytic capacitor, 35... Transistor,
36...Delay circuit, 37...Transistor, 38
...Transistor, 39...Resistor, 40...Resistor, 41...Resistor, 42...Resistor, 43...Output end, 44...Melody IC, 45...Resistor, 4
6...Resistance, 47...Resistance, 48...Resistance, 49
...Resistance, 50...Resistance, 51...Resistance, 52...
...Resistor, 53...Capacitor, 54...Capacitor, 55...Capacitor, 56...Capacitor,
56a... Capacitor, 56b... Electrolytic capacitor, 57... Variable resistor, 58... Transistor,
59...transistor, 60...speaker, 61
...Electronic sound generator, 62...Output end, 63...Input terminal, 64...DC power supply connection end, 65...DC power supply connection end, 66...DC power supply, 67...Output end, 68... Sound sensing part.

Claims (1)

[Claims] 1 Consisting of a sound sensing section that detects external sounds, and an electronic sound generating section that sequentially generates different electronic sounds such as melodies, animal sounds, music box sounds, etc. each time the sound sensing section detects an external sound, and The sound sensing section connects a detection amplifier circuit to the output end of a microphone for external sound detection, connects a one-shot multivibrator circuit for rectangular wave shaping to the output end of this detection amplifier circuit, and connects the one-shot multivibrator circuit to the output end of the detection amplifier circuit. A one-shot multivibrator circuit for low waveform shaping, which has a CR time constant setting circuit that determines the electronic sound selection and the playing time of the electronic sound, is connected to the output end of the one-shot multivibrator circuit. A delay circuit for electronic sound identification that delays the low waveform signal by the time set by the product of the resistor and the electrolytic capacitor is connected to the end, and the waveform signal is output to the H level at the output end of this delay circuit. A flip-flop circuit is connected to the flip-flop circuit for converting the electronic sound by inverting the sound from the low level to the L level, and the electronic sound generating section has an output terminal of the flip-flop circuit of the sound sensing section and a CR time constant setting circuit. An electronic sound generator characterized in that a melody IC that sequentially generates different electronic sounds is connected to the other output end of a one-shot multivibrator circuit.