Many function generators create square waves by applying a bipolar sine wave to a comparator’s input. When this input signal exceeds the comparator’s threshold voltage, the instrument’s output is V ...

If you have a cheap function generator it’s likely to contain a one-chip solution that generates approximations to sine and triangle waveforms through modifying a square wave with a set of filters.

Thats where this function generator sent to us by [Mohonri]comes in. Based around a ATTiny25 and a rail to rail op amp which is able to replicate frequencies from 1Hz to about 40KHz, in square ...

This circuit generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. This waveform generator integrated circuit chip is very interesting ...

If this is a problem, then the gains of IC2 and IC3 can be set to approximately 50 as described in the IC data sheet. The actual circuit of the generator is built with three LM386 ICs.

1. This very-low-frequency sine- and square-wave generator requires few components, but provides low-distortion outputs (derived from LTspice simulator).