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7 years, 10 months ago.
Frequency domain representation of data from ADC
I am working with microphone and mbed. Actually i need to detect a person presence using microphone and mbed. I have designed an initail circuit and I m getting data from the microphone to the mbed. what happens is i am constantly getting almost 3.3v at microphone+amplifier output. so the values from ADC remain pretty constant. it varies a little with voice etc .
Now i want is to see if i can have a better frequency domain representation of the the data i am getting ?
How i can do that using only the mbed.
Anyone ? Please help