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Adafruit Industries LLC
Audio FX Sound Board WAV/OGG Trigger with 16MB Flash
Adafruit Industries LLC
Electret Microphone Amplifier MAX4466 with Adjustable Gain
 
Adafruit Industries LLC
Electret Microphone Amplifier MAX9814 with Auto Gain Control
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Electret Microphone Amplifier MAX4466 with Adjustable Gain

Electret Microphone Amplifier MAX4466 with Adjustable Gain

Adafruit Industries LLC

This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, use the Maxim MAX4466, an op-amp specifically designed for this delicate task. The amplifier has excellent power supply noise rejection, so this amplifier sounds really good and isn't nearly as noisy or scratchy as other mic amp breakouts. This breakout is best used for projects such as voice changers, audio recording/sampling, and audio-reactive projects that use FFT. On the back, included is a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x. That's down to be about 200mVpp (for normal speaking volume about 6" away) which is good for attaching to something that expects 'line level' input without clipping, or up to about 1Vpp, ideal for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp.

Specifications
  • Function:Microphone Pre-Amp
  • Supplied Contents:Board(s)
  • Type:Audio
  • Utilized IC / Part:MAX4466
Parts
Associated Product
Maxim Integrated Class AB Amplifier
Category: Semiconductors, Development Tools-Linear-Amplifiers-Audio Amplifiers-Class AB-1-Channel (Mono)