This small breakout board couples a small electret microphone with a 100x opamp to amplify the sounds of voice, door knocks, etc loud enough to be picked up by a microcontroller’s Analog to Digital converter. Unit comes fully assembled as shown. Works from 2.7V up to 5.5V.
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Documents
Schematic
Eagle Files
Example PIC ADC Code
Datasheet (OPA344)
Datasheet (Mic)
Example Audio LED control project by Adam Greig
GitHub
