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Miscellaneous: Microphone Circuits, Amplifiers, Mic Schematics...

Microphone electronic circuits

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Amplifier circuit for electret microphones (condenser microphones). Amplifier the audio signals picked up by the electret microphone, using 741 op-amp and a 2N2222 transistor.
Photo: FM Transmitter kit with microphone (Wireless Mic) FM Transmitter kit with microphone (Wireless Mic)
FM microphone kit. Build an actual FM station that transmits over 100ft. Learn about microphones, RF oscillators, and how FM radio works.
This microphone preamplifier circuit features high gain, super low-noise and balanced input.