لخّصلي

Problem definition In this project.Since the LED is DC component and the input signal is AC typed, a third operation must be added to convert the AC signal to DC signal.We are working on designing and implementing the circuit which can be used to detect the whitling sounds and provide a proper indicator according to the intensity and the frequency of the detected sound.this operational amplifier is using to magnify the amplitude of the signal to make it able to activate the output component.The circuit is based on the microphone as input component and the proper visual output component such as the LED.This operation can be applied to remove the unwanted part from the input signal.

Problem definition
In this project. We are working on designing and implementing the circuit which can be used to detect the whitling sounds and provide a proper indicator according to the intensity and the frequency of the detected sound. The purpose of applying this type of circuits is to use the sounds to detect the things existence. For example, this circuit can be used to detect the location for the lost keys. The circuit is based on the microphone as input component and the proper visual output component such as the LED. the microphone is a device which can detect the sounds and convert them to electrical signal with high frequency. This signal can be processed by couple of processors. The first processor is the filter which is using to block part of the sound wave and pass the other part. This operation can be applied to remove the unwanted part from the input signal. the second processor is the operational amplifier. this operational amplifier is using to magnify the amplitude of the signal to make it able to activate the output component. The output component is the LED which can receive the electrical signal and convert it to visual light. Since the LED is DC component and the input signal is AC typed, a third operation must be added to convert the AC signal to DC signal. This operation is known as rectification operation and it can be done using the bridge rectifier circuit.