As we mentioned, condenser microphones need some additional power to power the preamp, but that doesn't always mean you need an extra cable to do this; in some cases, this power can still come ...

along with a low-cost condenser microphone with a transistor-based preamplifier and an LM386 op-amp for the speaker circuit. In the ESP32 module the built-in DAC and ADC are used for audio in and ...