I was browsing the ECE subreddit lately and found that some of the most popular posts over the last few months have been animated GIFs helping understand some mathematical concepts. I thought there would be some value in aggregating the DSP related gifs on one page.

The relationship between sin, cos, and right triangles:

Constructing a square wave with infinite series (see this video):

Fourier Transform

Continuous Fourier transform of rect and sinc functions