M5Stack Microphone Unit (LM393)

The microphone unit is a sound sensor with an integrated omnidirectional electret microphone. The signal is amplified and output by the MAX4466 microphone preamplifier. The amplifier can effectively suppress mains noise and common-mode noise, and the output signal has high sound reproduction, making it suitable for use in noisy environments. The unit can output both analog signals and digital level signals. The integrated LM393 dual voltage comparator allows for the adjustment of the comparison voltage threshold by adjusting a 10K variable resistor. This sensor is ideal for acoustic electrical conversion, audio recording and sampling, FFT acoustic feedback, voice switching, and other projects.