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Well you’d require a microphone (condensor), a comparator and some other discrete components.
The microphone will output a voltage proportional to intensity of sound falling on it. This can be given to the comparator inverting teminal. A reference voltage to the non-inverting terminal will help ingnore any undesired operation. Create a voltage-divider for this terminal.
The comparator can then drive a transistor withwhich you can control another circuit you wish to add.
Play around with a circuit simulator, and create your own designs. Its more satisfying.
ISIS Professional which is a part of Proteus will help you simulate your circuits, though you’d have to have a replacement for the ‘clap’ to be sensed by the microphone.
Like, proteus comes with a model for LDR. this can be replaced for the mic adjusting the intensity of the lamp in proteus would be similar to the intensity of the ‘clap’ falling on a microphone.
Good Luck!
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