I have designed a simple circuit that amplifies an electret microphone (this one: https://www.sparkfun.com/products/8635).
This amplified signal must be no greater than 3.3V, so I bring down the voltage to power the OP-AMP using the appropriate voltage divider.
Here is the schematic:
Here's the problem: I hooked up an LED to Vout, and the microphone appears to literally be doing nothing. It is a very high possibility that I just simply don't understand how the microphone works. I have included the product link so that it may be useful for someone to explain the microphone to me.
Another question: the final goal of this circuit is that it feeds in human voice into the ADC of me DE0-Nano FPGA board. Would there be anything wrong with this method? What is a better way?