Synchronized sounding/flashing circuit

Details Synchronized sounding/flashing circuit Synchronized sounding/flashing circuit

1994-09-01

2001-05-29

Kuntz, Curtis (Department: 2608)

Electrical audio signal processing systems and devices

Sound effects

C446S401000

Reexamination Certificate

active

06240190

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a synchronized sounding/flashing circuit to cause a speaker to emit sound intermittently and to cause a plurality of lights to alternately flash in response to the occurrence of the emitted sound.
2. Description of the Prior Art
A toy gun can emit intermittent sound when a trigger thereof is depressed on. Some toy guns are configured with a plurality of light emitting diodes which emit light alternately thus providing sound and flash effects.
FIG. 4
is a conventional sounding/flashing circuit used to control a toy gun to emit sound and flashing light. The conventional sounding/flashing circuit comprises a sounding synthesizer
50
, a flasher
60
, and a digital-to-analog (D/A) converter
70
. The sound synthesizer
50
comprises an output terminal
51
for outputting a sound signal and an enabling output terminal
52
for sending out an enable signal upon being supplied with power or being triggered. The sound synthesizer
50
, when supplied with power, will emit an intermittent sound signal to the D/A converter
70
which converts the sound signal to an analog signal and transmits the analog signal to a speaker SP thus enabling the latter to emit intermittent sound similar to the firing sound of a machine gun. The sound synthesizer
50
sends the sound signal to the D/A converter
70
, in the meantime it triggers the flasher
60
to enable a plurality of LEDs
61
connected thereto to flash alternately. The conventional sounding/flashing circuit can provide concurrent sound and flash effects, yet the flash from the LEDs
61
is in constant frequency thus cannot indicate the realistic occurrence of the intermittent firing sound. It is requisite to provide a new sounding/flashing circuit which synchronizes the sound and flash emitted from a toy gun thus increasing the realism of the toy gun.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a synchronized sounding/flashing circuit for automatically changing the flashing occurrence in response to variable occurrence of the firing sound.
In accordance with one aspect of the invention, there is provided a synchronized sounding/flashing circuit which includes a sound synthesizer stored with sound data and emitting a sound signal upon being supplied with power, a digital-to-analog. converter connected to the sound synthesizer for converting the sound signal to an analog signal for driving an external speaker, a sound level/density detector connected to the sound synthesizer for generating a detected signal in response to the sound signal therefrom, a frequency generator being connected to the sound synthesizer and triggered thereby when the sound synthesizer outputs the sound signal and outputting a signal having a frequency according to the detected signal, a flasher being connected to the sound level/density detector and triggered thereby when the sound level/density detector outputs the detected signal, and being connected to the frequency generator for sequentially and alternately outputting a pulse from a plurality of output terminals thereof with a frequency proportional to the frequency of the signal outputted from the frequency generator.
Further objectives and advantages of the present invention will become apparent from a careful reading of the detailed description provided hereinbelow, with appropriate reference to the accompanying drawings.


REFERENCES:
patent: 3737722 (1973-06-01), Scharlack
patent: 5111113 (1992-05-01), Chu
patent: 5113738 (1992-05-01), Krucoff
patent: 5461188 (1995-10-01), Drago et al.
patent: 1604881 (1981-12-01), None
patent: 1217447 (1986-03-01), None
patent: 1301423 (1987-04-01), None
patent: 1569027 (1990-06-01), None

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