Gambar Skema Condenser Microphone AmplifierThe amplifier has an adjustable gain, which is performed by. R1 (a 1 Mega Ohm variable resistor). It controls the feedback of the 741 opamp, which in turn drive a 2N2222 output transistor.
The circuit takes the audio signal rom the condenser microphone & amplifier it, so you are able to use the microphone as the input to some device which wouldn't normally accept microphone level signals (which are very low).
Parts List:
The circuit takes the audio signal rom the condenser microphone & amplifier it, so you are able to use the microphone as the input to some device which wouldn't normally accept microphone level signals (which are very low).
Parts List:
- U1 - LM741 op amp ic
- R1 - 1 megohm resistor
- R2, R3 - 6.8k ohm resistor
- R4 - 1k ohm resistor
- C1, C2 - 0.47uF ceramic capacitor
- MIC1 - electret condenser microphone
All resistors are 5 or 10 percent tolerance, 1/4-watt. All capacitors are 10 percent tolerance, rated 35 volts or higher.
