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[on:]

I've been playing around with the FFT code that was posted here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1286718155
I wrote a sketch which generates various signals and then prints out their FFT and I've written some info about the output of the sketch and posted it to a web page. Have a peek if you're interested. http://members.shaw.ca/el.supremo/Arduino/fft/ffttest.htm

Pete

[Reply #1 on:]

I've been playing around with the FFT code that was posted here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1286718155
I wrote a sketch which generates various signals and then prints out their FFT and I've written some info about the output of the sketch and posted it to a web page. Have a peek if you're interested. http://members.shaw.ca/el.supremo/Arduino/fft/ffttest.htm

Pete

thanks pete, it's very usefull

[Reply #2 on:]

Thank you.

Pete

[Reply #3 on:]

Looks great, thanks

[Reply #4 on:]

You're welcome.

Pete

[Reply #5 on:]

If you are interested in using FFT for a real world application, have a look at the ATmega328Accuracy project, at http://sourceforge.net/projects/lxardoscope/files/accuracyInvestigation/ . In this project, FFT was used with sinewaves for characterization of the ATmega328 ADC. Results include Signal-to-Noise Ratio and Effective Number of Bits.

[Reply #6 on:]

Is this for making an FM transmitter? What is FFT used for?

[Reply #7 on:]

The Fast Fourier Transform is a mathematical technique to analyze the frequency components of a signal.

Pete