Good Resources EEVBlog 611 – Great video in a series of videos about microphones Voltage Requirement The characteristics of elect microphones are typically specified with a 2K resistor up to +5V. However you can power with a lower voltage. Many will work down to 1.2V, and some down to 0.8V (see the eevblog video) – […]

A good microphone pre amp circuit we've used in product designs: