Building an Electret Microphone with an LM324N
A tiny electret capsule makes a tiny signal. Bias and coupling make it usable; an optional LM324N preamp raises it for a 3.5 mm line input.
Electronics
Circuits, components, and hands-on builds.
Circuits, components, and hands-on builds.
A tiny electret capsule makes a tiny signal. Bias and coupling make it usable; an optional LM324N preamp raises it for a 3.5 mm line input.