White Noise Generator
Électronique / Electronic
NE5532

White noise is a noise that has a wide frequency range. The shower-like noise you hear when you tune your FM radio to an area with no station is one kind of white noise.

It is useless noise normally, but when you play electronic musical instruments, you can use white noise as a sound source.

When you finish building this circuit, set the switch to position ON to turn on the power.

Look at the schematic.

We will use the noise that is generated when you apply a reverse voltage to the base and the emitter of transistor Q1.

IC 1 acts as an oscillator.

The output of this oscillator is rectified by diodes D1 and D2 and flows to Q1.

IC 2 amplifies the noise so that you can hear it through the earphone.