This audio amplifier circuit is useful in classrooms to reduce the strain of lecturing ,if the surrounding environment is noisy. It uses the power amplifier IC LM380 that gives 2 watts output which is ...

A microphone preamp circuit is used to amplify a microphone’s output signal to match the input level of the devices following it in the signal chain. Matching the peaks of the microphone’s signal ...

Anyone know of any good circuits for making a pre-amp for a microphone?<P>Or, alternatively, I know the oldschool apple microphones had the funny plug since they drew power as well, and had a preamp ...

“Phantom powering” is the most common way to power a microphone. The technique supplies 48 V provided through two 6.81-kΩ resistors in a differential input line. 1 This idea explains an improved way ...

Circuit boards etched and drilled. This is a closeup of one side of the microphone PCB board. As you can see it is a little crowded. The copper pipe before work began. Success! The mic head’s windows ...