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SparkFun Sound Detector
Description:
The SparkFun Sound Detector is a small and very easy to use
audio sensing board with three different outputs. The Sound Detector not only
provides an audio output, but also a binary indication of the presence of
sound, and an analog representation of its amplitude. The 3 outputs are
simultaneous and independent, so you can use as many or as few as you want at
once.
The envelope output allows you to easily read amplitude of
sound by simply measuring the analog voltage. Gain can be adjusted with a
through-hole resistor, to change the threshold of the binary (gate) output pin
as well. Check the hookup guide below for more information about setting gain.
Each of the three output signals is present on the .1"
pin-out at the edge of the board. They are active simultaneously. If you aren’t
using one in your particular application, simply leave that pin disconnected.