Square and Triangle waves generator

412

08:16:27

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 10 years ago

sanbel34

10 years ago

selman

10 years ago

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

selman

10 years ago

And shake your phone

Mellotron89

10 years ago

It works! Very Nice!

selman

10 years ago

mr. Selman... 😅😅😅, thanks !!!

DarshanChirke

9 years ago

Its nice. I like the circuit

matheuscaldasrj

8 years ago

Is there a way to change frequency?

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