>ElectroSuite.com>> – This Sound Detector Amplifier output of a regular electret condensor microphone quite nicely by adjust sensitivity of R1.
Sound Detector Amplifier – reconnsworld.com
Sound Detector Amplifier
U1 : LM741 Op Amp ICR1 : 1 megohm resistor
R2, R3 : 6.8k ohm resistor
R4 : 1k ohm resistor
C1, C2 : 0.47uF ceramic capacitor
MIC1 : Electret Condenser Microphone
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