Digital Signal Processing was one among the tough subjects that i studied during my B-Tech life. Finding DFT was a challange at that time (now too ). It was hard because you need to do a lot of calculations in minimum time and the worst thing,  to draw the magnitude plot after calculating all those stuffs.

So we were asked to create an online DFT calculator which will help to do things very easily. My friend fayaz did the initial python script and later i changed little bit on it to present it via Web.

I used the Google Chart api for the magnitude plot ( It is not perfect but it still works. )

You can see the live demo over here. Students of B-Tech in India may be having this as a part of their academics, so you people can try it just once (or more if you like it ).

The user interface is very very simple, I didn’t try to design a good one, sorry

The calculator is simple with just one html file and a python script.