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HI CAN ANY BUDDY GIVE CIRCUIT AND IDEA TO PROCEDURE OF MAKING AUDIO SPOTLIGHTING DEVICE FOR MY PROJECT.
Have a look here. Diagram and explanation. http://kitsrus.com/pdf/k12.pdf - copy and paste - have fun
Are you talking about the "audio spotlight" by Holosonics? That is, a beam of sound, not a light show.
The math behind it is in this article here.
plz help me