Electret Microphone Circuit Capacitor

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.

Electret microphone circuit capacitor.

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. This is small and powerful for a low power supply. This is a microphone that suitable for most applications including for use with a computer. The distance between the plates is directly proportional to sound present in the environment.

The resistor and capacitor needed can easily be obtained from most electronic online retailers. 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. The type of electret microphone we will use is a 2 2kω electret microphone that requires only 2 2v of power. This is another a circuit diagram of homemade mic speaker amplifier using lm386.

An electret microphone is a type of electrostatic capacitor based microphone which eliminates the need for a polarizing power supply by using a permanently charged material. This electret has a fixed charge c and is embedded between the two electrodes. This is the best and interesting circuit for the beginner. The diaphragm is made of thin teflon material and is also termed as electret and hence the name electret mic.

Electret condenser microphone amplifier circuit.