How to get correct output of sound level meter in db

Projects General Guidance
7

Hi,
OPs circuit.
No logarithmic amplifier...

Measuring-sound-in-dB-with-Microphone-and-Arduino-circuit-diagram-with-high-and-low-pass-filter.png
Measuring-sound-in-dB-with-Microphone-and-Arduino-circuit-diagram-with-high-and-low-pass-filter.png880×408 16.7 KB

Tom... :slight_smile: