Wein bridge and Function generator

Overview

In this project I Created a function generator and wein bridge to be able to generate a square wave, a triangle wave and a sine wave.

Wein bridge circuit

The circuit of the wein bridge involves a gain stage and a filtering stage. the circuit works by amplifying the initial voltage, then through the feedback loop, filtering only one frequency. The core working principle of this circuit is for a signal to be amplified, it must have exactly the phase and gain necessary, and every other signal gets attenuated as it gets iterated in the feedback loop, resulting in only 1 sine frequency.

The value of using a wein bridge is their incredibly stable frequencies, and they're suitable for audio frequencies (Khz)

Function generator circuit

As for the function generator, the circuit works by using a comparter oscillator, and simply integrating the output to create a triangle wave.

Results

Reflection

The main challenge I faced was in tuning the sine generated, as the gain has to be exact else the shape will be clamped, or it will decay to 0. Returning to this project, I would like to add frequency and magnitude changing, and make ait into a permanent pcb to use for other works.