Abstract
This is a sound control home automation project that uses sound to turn on or off any electrical circuit. This is a circuit that works by creating sound from a distance. When a person claps or makes a sound that can be caught by a condenser microphone, the circuit's output light turns on. If another person claps, the light will turn off. The basic idea behind this project is that the condenser microphone catches up your claps, coughs, and the sound of a book being knocked off the table. It generates a weak electrical signal that is amplified by the transistor stage that follows. Each signal changes the state of two transistors coupled in a bistable multivibrator. One of these transistors controls a bulb through a heavier transistor. This is a sound-activated switch. Sound, for example, may be used to turn on or off a fan, a fluorescent light, a television, and other equipment.
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