Sound Operated Door Bell
Sound Operated Door Bell With Complete Circuit Diagram
Suppose you come from shopping and you are holding heavy bag in your both hands ,who you will ring bell of your home .bellow circuit is your solution
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NOTE:-we don't make all projects, all are of from different website.we also don't know where they have taken from.we just helping student and needed people .we are don't responsible for any harm from our website.thank you.
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