It's been a while since I looked at the FFT in detail so I have a basic question.
What information do you need to plot the FFT of a signal?
How many samples (N)
I am capturing some real time ADC data through an AVR and want to plot the FFT of this signal. I know (somewhat) my sampling frequency and number of samples in one cycle of the wave. I am getting about 28 samples in one cycle of a 1Khz sine wave which means my sampling frequency is 28 ksps.
I am starting with a known sine wave input of known frequency to test my FFT and then proceed to a real life signal.