Time Domain to Frequency Domain

How to Use

Select a waveform type (Sine, Square, Sawtooth, Triangle) using the buttons
Observe the time-domain waveform on the left and its frequency spectrum on the right
Adjust the number of harmonics to see how the waveform shape changes as more components are added

Sine wave: single spike in the spectrum — the purest possible signal
Square wave: odd harmonics only (f, 3f, 5f...) with 1/n amplitude falloff
Sawtooth wave: all harmonics (f, 2f, 3f...) with 1/n falloff — richer harmonic content
Triangle wave: odd harmonics with 1/n² falloff — smoother due to faster convergence
Adding harmonics improves time-domain accuracy but requires more bandwidth