Electret Microphone Circuit Capacitor

This is another a circuit diagram of homemade mic speaker amplifier using lm386.

Electret microphone circuit capacitor. This is small and powerful for a low power supply. The electret along with the two electrodes takes the form of a sensitive variable capacitor whose outer surface responds to sound vibrations giving. The distance between the plates is directly proportional to sound present in the environment. This is the best and interesting circuit for the beginner.

The electret microphone has two plates inside it just like a capacitor. The type of electret microphone we will use is a 2 2kω electret microphone that requires only 2 2v of power. This is a microphone that suitable for most applications including for use with a computer. The electret microphone operates in the range of 1 5 10v typically 2v and the current between the jfet s source drain ground output is usually max.

Please note that the capacitor component shown in the electret capsule schematic above is represented by the pick up plate the electret material which together create a capacitor. An electret is a stable dielectric material with a permanently embedded static electric dipole moment which due to the high resistance and chemical stability of the material will not decay for hundreds of years. A very basic circuit to get started with microphone is shown below. Electret condenser microphone amplifier circuit.

The resistor and capacitor needed can easily be obtained from most electronic online retailers.