Square and Triangle waves generator

396

08:11:10

The classic waveform generator made with OpAmps. 
The first block is a Schmitt trigger which generates a square wave with its positive feedback; this signal enters the second stage, an integrator made with a capacitor as a negative feedback, which integers the square wave and generates a triangular wave. By changing the 1.3k resistor you regulate the gain, while the DC voltage source is used to regulate the output offset.
I've insert a two positions switch to try the noise injiection into the loop with a smartphone shake, suggested by mr. Selman (see comments below).

published 9 years ago

sanbel34

9 years ago

selman

9 years ago

Remove the AC source and connect the blue wire to the orange wire.....

selman

9 years ago

And shake your phone

Mellotron89

9 years ago

It works! Very Nice!

selman

9 years ago

mr. Selman... 😅😅😅, thanks !!!

DarshanChirke

9 years ago

Its nice. I like the circuit

matheuscaldasrj

7 years ago

Is there a way to change frequency?

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