Use a Schmitt trigger. You can buy one of these as an I.C.
A multivibrator produces square or rectangular waveforms.
AC sinewave
Square
The wave with the maximum RMS value, in comparision with the peak value, is the square wave.
A transverse wave can be produced on a stretched string. In this type of wave, the motion of the particles of the medium is perpendicular to the direction of the wave propagation.
A wave is a normal wave and a wave length is the wave Height or distance
transverse wave
A: square wave can be positive and or negative. A digital signal is a square wave but it can be of invariable duty cycles
Frequency waves are produced by a vibrating source, such as a sound wave produced by a vibrating object or an electromagnetic wave produced by an oscillating electric charge. The rate at which the source vibrates determines the frequency of the wave.
Filter the square wave with a low-pass filter sharp enough to remove all frequencies above the frequency of the square wave.
If you use a square wave as input to an integrator circuit, the output will be a triangle wave.
the wave produced in a stretched string will be a standing wave .it will have a node and antinode.node means point with zero displacement and antinode means point with maximum displacement