Microphone Audio Amplifier

This is a simple and wonderful experiment, one can view the spectrum of the CRO. Unit is operated on external + 9V DC supply. This is a simple and wonderful experiment, one can view the spectrum of the CRO. The microphone is connected to the input and the amplified output is available on the speaker and the amplified spectrum can be viewed on the CRO. The demo unit is operated on external + 9V DC supply.