Adafruit 1063 Electret Microphone Amplifier With Adjustable Gain

Product Description

Adafruit Electret Microphone with Built-in Amplifier
- Adafruit 1063, The Adafruit Electret Microphones with Adjustable Gain Amplifier feature a built-in microphone & use the MAX9814 microphone amplifier chip. There's a small trimmer pot on each one to adjust the gain between 25x & 125x so that you can minimise volume related distortion. They can be supplied with 2.4 to 5V DC & are capable of rail to rail output with a DC bias of Vcc/2. Be careful when selecting your power supply, 5 Vpp may offend the Line Input of a standard amplifier for example. If you want to connect one to a Line Input then use a blocking capacitor of between 1 & 100µF unless you have a differential amplifier or it already has its own blocking capacitor. Adafruit recommend using a low-noise 3.3V DC supply if you intend connecting these amplifiers to an analogue to digital converter (ADC). In this application there's no need for a blocking capacitor. Get started quickly using Adafruit's tutorial for this microphone amplifiers showing how to wire them up to headphones. Having mastered that, you can move on to connecting one to a microcontroller. Adafruit have a tutorial & FFT library for the Arduino which extracts frequency information from the audio & another which is a sound level tutorial. Supplied with a fully assembled amplifier board, & a strip of 0.1in. header pins for you to solder on if required. Adafruit 1063 Electret Microphone Amplifier with Adjustable Gain