Max4466 Electret Microphone Amplifier With Adjustable Gain Module

The MAX4466 Electret Microphone Amplifier with Adjustable Gain Module is a pre-assembled and tested board that comes equipped with a 20-20KHz electret microphone soldered onto it. Here are some key features and details about this amplifier module:**1. Maxim MAX4466 Op-Amp:**- The module utilizes the Maxim MAX4466, which is an operational amplifier (op-amp) specifically designed for amplifying electret microphones. The MAX4466 offers excellent power supply noise rejection, resulting in high-quality sound with minimal noise.**2. Electret Microphone:**- The module comes with a 20-20KHz electret microphone pre-soldered onto the board. Electret microphones are commonly used in audio applications for their sensitivity and reliability.**3. Adjustable Gain:**- The amplifier features an adjustable gain for fine-tuning the amplification process. A small trimmer pot is provided on the back of the module for easy gain adjustment.**4. Gain Range:**- The gain can be adjusted within a range of 25x to 125x. This flexibility allows users to set the amplification level according to their specific project requirements.**5. Versatile Applications:**- Ideal for various projects, including voice changes, audio recording/sampling, and audio-reactive projects utilizing Fast Fourier Transform (FFT) analysis.**6. Gain Adjustment Potentiometer:**- The trimmer potentiometer on the back enables users to precisely set the gain for the desired signal level.**7. Output Characteristics:**- The output can be adjusted to be approximately 200mVpp for normal speaking volume about 6 inches away, suitable for devices expecting ‘line level’ input without clipping. It can also be set up to about 1Vpp, ideal for interfacing with a microcontroller’s analog-to-digital converter (ADC).**8. Rail-to-Rail Output:**- The output is rail-to-rail, allowing it to reach up to 5Vpp if the input sounds become loud. This ensures that the module can handle a wide range of audio input levels.**9. Suitable for Microcontroller Interface:**- With its adjustable gain and rail-to-rail output, the module is suitable for interfacing with microcontrollers, making it versatile for electronic projects.**10. Audio Quality:**- The module provides good sound quality with reduced noise and distortion compared to other microphone amplifier breakouts.In summary, the MAX4466 Electret Microphone Amplifier with Adjustable Gain Module offers a flexible and high-quality solution for audio amplification projects, providing users with the ability to adjust gain levels for various applications in a convenient and reliable manner.