Electret Microphone Amplifier MAX9814 with Auto Gain Control

Introducing the Sonic Ear Enhancer, powered by the Lonely Binary MAX9814 Electret Microphone Amplifier IC! 

Bring your project to life with the perfect audio companion - an electret microphone amplifier with automatic gain control (AGC). This fully assembled and tested board features a high-quality electret microphone soldered on, covering a wide frequency range from 20Hz to 20kHz.

What sets this microphone amplifier apart is its built-in AGC. Say goodbye to unpredictable audio levels! The AGC ensures that loud sounds are tamed to prevent distortion and clipping, while soft, distant sounds are amplified for better detection and recording. No more constant adjustments to the amplifier gain - let the Sonic Ear Enhancer do the work for you.

At the core of this amplifier lies the impressive MAX9814 chip. It offers versatile configuration options that can be easily adjusted using the breakout. By jumpering the Gain pin to VCC or ground, you can set the amplification level to 60dB (default), 40dB, or 50dB. Additionally, you have the freedom to modify the Attack/Release ratio, choosing between 1:4000 (default), 1:2000, or 1:500.

The output from this amplifier reaches a maximum of about 2Vpp on a 1.25V DC bias. This makes it compatible with any Analog/Digital converter that supports up to 3.3V input. If you prefer to connect it to a Line Input, simply use a 1-100uF blocking capacitor in series (we find that 100uF delivers the best results).

Unlock the full potential of audio recording and detection with the Sonic Ear Enhancer. Whether you're working on a sound monitoring system, voice recognition project, or anything in between, this microphone amplifier is your go-to solution. Trust in the Lonely Binary MAX9814 Electret Microphone Amplifier IC to bring clarity and precision to your audio experience!