How to get a single point of the rising edge of a square wave in relation to its time?

1. What is the FFT of a square wave?
2. How do you find the frequency of a square wave?
3. Can a square wave have harmonics?

What is the FFT of a square wave?

In the frequency domain, the overall average of a signal is its content at DC or 0Hz -- so that's why there's a peak at 0Hz. The FFT of a square wave that is centered on 0V has energy at every odd harmonic, starting at 1.

How do you find the frequency of a square wave?

Here, T is the period of the square wave and f is its frequency, which are related by the equation f = 1/T.

Can a square wave have harmonics?

A square wave consists of a fundamental sine wave (of the same frequency as the square wave) and odd harmonics of the fundamental. The amplitude of the harmonics is equal to 1/N where N is the harmonic (1, 3, 5, 7…). Each harmonic has the same phase relationship to the fundamental.