Compact, lownoise electret microphone amplifier module built around the MAX4466 op amp, with an onboard electret microphone and an adjustable gain control. Designed to deliver clean, amplified analog audio signals for microcontrollers, singleboard computers, and audio frontends. Key benefits Makes weak electret microphone signals usable: amplifies mic output so analogtodigital converters and audio circuits can read clear sound. Adjustable gain: onboard potentiometer lets you set the amplification to match quieter or louder sources without changing hardware. Simple integration: standard 3pin output (VCC, GND, OUT) and compact PCB make it easy to add to Arduino, Raspberry Pi, ESP32 and other projects. Lownoise amplification: MAX4466 provides clearer audio with less hiss than unamplified microphone inputs, improving detection and recording reliability. What it does (functionality) Accepts sound via the onboard electret microphone and amplifies the signal using the MAX4466 op amp. Provides an analog output that can be fed to an ADC, comparator, or audio input for further processing. Gain is adjusted with the small trim pot on the board to suit application needs. Key attributes Model and components: GYMAX4466 module using the MAX4466 amplifier IC and onboard electret microphone. Gain: useradjustable via onboard potentiometer for flexible sensitivity control. Connectivity: standard 3pin header for VCC, GND, and analog OUT — easy to wire to breadboards and headers. Compatibility: designed to work with common 3.3V and 5V systems and microcontrollers (Arduino, Raspberry Pi, ESP boards, etc.). Size and build: compact PCB module with soldered components and microphone capsule; lightweight for mounting in small enclosures. Performance: optimized for lownoise microphone amplification and clear analog output suitable for voice detection, audio sampling, and soundtriggered circuits. Typical applications / use cases Voice sensing and detection: integrate with microcontrollers to trigger actions when sound levels exceed a threshold (doorbells, alarms, toy responses). Sound sampling and recording: provide amplified input to ADCs for simple audio capture, hobbyist recording projects, or environmental sound logging. Robotics and interactive devices: add a reliable audio input to robots and interactive installations for voice commands or soundbased behaviors. Practical notes Adjust the onboard potentiometer to prevent clipping on loud sources or to raise sensitivity for quiet environments. Connect OUT to an ADC or amplifier input; ensure ground is common between the module and the host. Compact size makes it suitable for breadboard prototypes and embedded mounting; protect the microphone capsule from direct airflow and debris for more consistent readings. This GYMAX4466 electret Microphone Amplifier module provides an easy way to add amplified, adjustable microphone input to electronics projects, improving sensitivity and signal quality without complex circuitry.