This small breakout board couples a small microphone with a 100x opamp to amplify the sounds of voice, door knocks, etc loud enough to be picked up by a micro controllers Analog to Digital converter. Unit comes fully assembled as shown.
Arduino microphone sound detection sensor module
Two outputs: 1. AO, analog output, real-time output of the microphone voltage signal
2. DO, digital output when the sound intensity reaches a threshold
Sensitivity potentiometer adjustable
Use DC 5V power supply
Power indicator LED
Pin layout: 1. Analog 2. Ground 3. + 4. Digital