Shutao 8 Pcs MAX4466 Electret Microphone Amplifier Adjustable Module Microphone Preamplifier Blue Breakout Board

MAX4466 module power supply voltage 24V to 55V can be compatible with STM Raspberry Pi and other development board motherboards Power supply rejection ratio 112dB Common mode MAX4466 tested board comes with a 2020KHz electret microphone soldered on the back there is a small trimmer pot to adjust the gain You can set the gain from 25x to 125x Easy to use Connect GND to ground VCC to 245VDC for the best performance use the quietest supply available this would be the 33V supply If you want to connect the amp directly to speakers If youre connecting to a microcontroller pin you dont need an amplifier or decoupling capacitor connect the OUT pin directly to the microcontroller ADC pin The audio waveform will come out of the OUT pin The output will have a DC bias of VCC2 so when its perfectly quiet the voltage will be a steady VCC2 volts it is DC coupled If the audio equipment youre using requires AC coupled audio place a 100uF capacitor between the output pin and the input of your device If youre connecting to an audio amplifier that has differential inputs or includes decoupling capacitors the 100uF cap is not required.