ABSTRACT:
Now a days in many discotheques we
find people dancing to the music which is common, trying for a difference we
designed our project in such a way that the lights flicker according to the
music. In this way, we can provide some more entertainment and attraction to
the area where it is installed.
Some mains operated
audio controlled light can be used in discotheques. The lamps glow in a running
sequence as per the sound generated. When music is played, the lights start
‘running’ through the lamps. Ten AC lamps are connected to the circuit. Only
one lamp glows at a time when there is no sound/music.
In this circuit a condenser mic is used
which converts audio signals to electrical signals. These electrical signals
from the microphone are fed to the transistor which amplifies the microphone
signals and also provides clock pulses to the decade counter IC1 CD4017.A
preset is provided to vary the signal level. As the decade counter has a total
of ten counts, the pin corresponding to tenth count is connected to reset pin
of IC1. One of the outputs of IC1 is fed to the clock pin of IC2 CD4017. The
outputs of IC2 CD4017 drive transistors to provide triggering pulses to triacs.
The
triac we are using is BT136, which is a 3-terminal device. In this triac, the
first two pins are the terminal1 and terminal 2 and the third pin is the gate
terminal. In this circuit, the triacs drive the AC lamps. In a triac when gate
terminal is triggered then the triac turns ON which in turn powers up the load.
Hence now we can see the lights running with the sound of music.
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