On: The Fourier Transform, explained in one sentence (...

[qez]

As someone without a lot of math background, the most confusing part of this is k. Is k a number, like 7.45 or whatever? Or something else? Everything else is just normal mathy stuff.

[torginus → qez]

k is the parameter of the function as in the 'x'-axis so instead of saying y=f(x), the formula says y=f(k)

You can see in the formula, that it's plugged in as the frequency of the signal the original signal is 'spun-around' with.

[gyorgytamas → torginus]

Smart. But please give my PCBs back.