Looking for how this sound sensor works, I found this: "This sound sensor is used to detect whether there’s sound surround or not, please don’t use the module to collect sound signal. For example, you can use it to make a sound control lamp, but not as a recording device."
Here are my opinion and doubts. Can anyone clarify this for me?
C3 is used to filter VCC from the non inverting input of U1B and allow only the voltage changes of MIC1
Since all this voltage difference will go to R6, why R7 is needed?
Why put 2 series op amp which have the same specs?
Why C2 is needed?
Why it cannot capture frequency sound but it can capture intensity?