Square, Integrator, Triangle, Sine (S.I.T.S) Oscillator [tutorial]

SITS noise-square

A noisy square produced from the simple oscillator using NE555 timer IC

From the simple oscillator using NE555 I posted before, we can make different wave signals. The simple oscillator produced a square wave signal in which the changes between 0 to 1 goes in an instant. To produce a different wave signal, we can put a passive filters to ‘shape’ the signal output. Passive filter consists a composition of Resistors and Capacitors in which they shave and cut the square wave output. In this post, I put a together an oscillator based on MK555 schematic which combine Square, Integrator, Triangle, Sine (S I T S – to make it easier :D) in one oscillator with various different passive filter.

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