2020-12-08 19:34

Ground noise

Hi, I built a radio music. Everything works fine except I have a buzz or ground noise as soon as the module plays or has something plugged in, like an lfo or whatever. Even is the out is not connected, I hear the noise. I tried to decrease the volume, but it didn't change anything. I also resoldered every joint, tried not to heat the diodes etc... When I touch the pins of the TL074 socket when it's playing, it makes a lot of noise. Do you think the problem can come from this IC? Do I need to change it? Great module by the way!


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