Pre Amplifier for Electret Condenser Microphone
This schematic shows a pre amplifier to be used with Electret Condenser Microphone.
- BC650C can be replace with BC549C transistors.
- The 1kΩ resistor limits the current flowing through the microphone.
- 1kΩ must be replaced by a 2.2kΩ resistor if the supply voltage is above 12V. You can omit this component if you are using a dynamic microphone instead of electret condenser microphone.