MAX4466 Electret Microphone Amplifier with Adjustable Gain Module

The fully assembled and tested MAX4466 Electret Microphone Amplifier with Adjustable Gain Module comes complete with a 20-20KHz electret microphone soldered onto the board. The heart of this module is the Maxim MAX4466 op-amp, meticulously crafted for the delicate task of audio amplification. Unlike other microphone amplifier breakouts, this module features excellent power supply noise rejection, resulting in exceptional sound quality with minimal noise or distortion.

This MAX4466 Electret Microphone Amplifier with Adjustable Gain Module shines in various applications, including:

• Voice modulation and transformation.
• Audio recording and sampling.
• Audio-reactive projects utilizing FFT (Fast Fourier Transform) analysis.

The module is thoughtfully equipped with a small trimmer potentiometer on the back, allowing you to tailor the amplification to your needs. The gain can be adjusted from 25x to 125x, catering to a wide spectrum of audio input levels.

How to use:

1. Connect GND to ground, VCC to 2.4-5VDC.
2. The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC/2 so when its perfectly quiet; the voltage will be a steady VCC/2 volt (DC couple).
3. If the audio equipment you’re using requires AC coupled audio; place a 100uF capacitor between the output pin and the input of your device.
4. If you’re connecting to an audio amplifier that has differential inputs or includes decoupling capacitors; the 100uF cap is don’t require.
5. The output pin is not designed to drive speakers or anything but the smallest in-ear headphones- you’ll need an audio amplifier (such as 3.7W stereo amp)
6. If you want to connect the amp directly to speakers. If you’re connecting to a microcontroller pin, you don’t need an amplifier or decoupling capacitor; connect the OUT pin directly to the microcontroller ADC pin.
7. For audio-reactive projects; we suggest using an FFT driver library which can take the audio input and ‘translate’ it into frequencies.

Features and Specifications: