Member #614529

Member Since: November 6, 2014

Country: United States

  • I want to make a dB meter, but I still don’t quite get it. I need to measure in a range of about 50-90 dB.

    If I use the envelope pin as input in a 12bits ADC, I can only measure untill max 72dB? This means I have to adjust the gain a bit because I can’t reach the 90dB.

    When I use a R17 of 47K I get * Arithemetic Gain of 32 * Gain (dB) of 30

    But how do I now know what range I can measure? (0 to >72) ? And how do I calculate the ADC value into dB?

    thanks

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