Hi, so I've been reading a bunch of posts about people using the 7805 regulator and noise showing up when reading values via the ADC. I'm working on a circuit, which uses a small electret microphone along with a 386n1 opamp, which is being read via the ADC in a ATTiny85. I'm using FFT and breaking …

Power noise issues with 7805 regulator showing up in analog value

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