What IC should I use to make a microphone to speaker amplifier?
I want to make a microphone amplifier. I have tried using the lm386 Ic but it performed poorly.
It would be helpful if anyone could give me a hint on what IC to use with or without a corresponding schematic.
input resistor which is around one thousand in this case (1 Meg / 1K).
and the emitter of the buffer transistor (2N3053) will also be 4.5 volts.
output speaker power is about I^2 * R or .06 ^2 * 8 = 28 milliwatts.
from the power supply and reduce the possibility of oscillation.
placed on top of the speaker/microphone as an audio source."
Thanks everyone for your answers! They have helped me further understand how microphones work I will sure take them into account the moment I decide to continue with the project.
The microphone has output voltage in micro volts(uV).It is not enough to be amplified only by using audio amplifier.Before you connect the microphone to audio amplifier some preamplification has to be done.You must connect the microphone to CE amplifier for preamplification and then you should connect the output of CE amplifier to audio amplifier.CE amplifier will amplify microvolt(uV) to Volts.Its better if you connect audio amplifier after CE amplifier.
Use the LM386 and a piezo microphone for the signal.
Will it work if I use it to amplify a person´s voice?
Assuming you build it correctly.