Sound sensor schematics

I put on SirBot website some quite detailed instruction to build a sound sensor, the one used to localize sound in space. This sensor uses an electret microphone, amplified by a LM386, a low voltage power amplifier. Using a microcontroller such as 16F88 and connecting this sensor to ADC pins, sounds can be converted, analyzed, even recorded. Finally, I’ve tried to make this sensor as small as possible.

Here’s the link to this SirBot’s module page.


  1. Roberto Gutiérrez’s avatar


    I was wondering if this sensor has a logarithmic output. Does it have?

    Many thanks in advance.



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