This simple circuit is basically a condenser microphone amplifier. This circuit has onboard pre-amp and audio amplifiers. So, one can use this circuit for variety of applications with suitable modifications. Some examples of application are, use it as an Intercom.
By making use of 2 Units of this circuit, we can make an Intercom or by using single board for Microcontroller like Raspberry Pi or Arduino, we can use this circuit as Audio Transducer. This circuit works on 9V DC power supply like battery.
With suitable modifications, this circuit can be used in variety of application in Industries, School-College Projects etc.,
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