fft,dft

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aswin p ajayan

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hi guys,
I am a newbie
i need to get frequency vs magnitude plot of sampled signal . I learned fft for that . but i am not sure how to scale frequency. can any body help me please . or just give the links of some pdf's which might be usefull . iam using pic 18f4550
 
Hello Aswin,
I'm new here also and haven't learned about uControllers yet. I have an Arduino starter kit ordered that should arrive next week.
Do you have an oscilloscope? Can you probe the pic with a scope and find what you need?
 
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actually what i want to perform a harmonic analysis on a composite signal. ie I dont know the out put freq to caliberate in the way you explained . any way thanks for the attention
 
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