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Great post, I'm intrigued!

I don't know how an oscilloscope works... can someone tell me how the 4*5 1D sin/cos functions are related to the 2D image of the number 2?

It's obviously not the sum... I also don't think the 2 has been separated into small 2D chunks in which each one has some of the sins/cos?

I know harmonic analysis well but I'm not getting where the Fourier part is here



It's the sum of the sin/cos with coefficients. There are two outputs, one for X and one for Y that draw the shape of the number without "raising the pen".

He describes how he calculated the coefficients by drawing the shapes on paper first.


Ah okay he is plotting x(t) vs y(t) to make 2d images where x is a sum of sines and y is a sum of cosines. These are called Lissajous figures.




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