RC Audio Oscillator

Posted on Feb 5, 2014

Here is the design of an audio oscillator that runs at approximately 1 KHz. I don`t remember where I got this circuit, probably from EMFRD, since Wes`s book is a treasure trove of useful circuits. This handy oscillator can be used as a source of audio for testing out audio stages in receivers and the like, or as a stable signal source for testing

RC Audio Oscillator
Click here to download the full size of the above Circuit.

microphone circuits in transmitter. Aschematic of the audio oscillator. What is not shown is the 8-volt regulator circuitry that is part of the finished module. Just use your favorite part and circuitry there, it isn`t critical at all. This view shows a bit more detail of the 0. 01 uF capacitors, the red-orange units in the foreground, used along with the 5. 6K resistors to set the frequency of oscillation. These capacitors can be changed for a higher or lower audio tone.

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