Friday, 11 January 2019

Homebrew 2 Tone Audio Oscillator

2 Tone oscillator. Based on two Wein bridge oscillators using LM358 op amps. See YouTube for detaails:


  1. Hi Charlie, thanks again for a cool project video! I just wanted to confirm, isn't the gain of 3 required at the non-inverting input of the op amp. In that case it will be 3 = 1+Rf/Rg. So your pot should be set at 6.6K. Which seems about right from looking at the video.

    Cheers, Ian

    1. Hi Ian. I'll have to take a look at that. I think it's right, but then again I'm more often wrong than right!

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