Review on π HiLetgo Electret Microphone Amplifier MAX4466 Module: Adjustable Gain Blue Breakout Board for Arduino - 2pcs Set by April Masters
Upgraded version of the amplifier
They are very cool and accurate. My Arduino gives me a nice wide range of values to use. There are other mic pickups WITHOUT an amplifier and let me tell you they are NOT worth the time as they return noisy and inaccurate readings. Try these - I use them for robotic eyes that wake up when you talk, open wide when you scream, and fall asleep when you're silent.
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