How To: Use an operational amplifier to amplify voltage and build a microphone circuit

Use an operational amplifier to amplify voltage and build a microphone circuit

An amplifier is something that amplified the voltage on a circuit. The most basic kind is an operational amplifier, and this video will show you how these work and how to use them in your electronics. As an example you'll learn how to make a microphone circuit for spying on people or listening to your heartbeat.

Circuit Diagram

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