Adafruit Electret Microphone Amplifier - MAX9814 with Auto G... - 2024 report by Whydis
Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
Add an ear to your project with this well-designed electret microphone amplifier with AGC. This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, we use the Maxim MAX9814, a specialty chip ...
My purpose was to convert the audio into digital pulses and feed into single GPIO of a Raspberry, and then measure time between pulses, to estimate frequencies, and this led to being able to do some crude voice recognition
You are reading snippets from reviews of Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
This was sensitive enough to pickup soft sounds for a project using an Arduino nano.
Even when no music was playing, however, this thing was able to pick up some of the faintest sounds; when I had it placed against my temple, I'm pretty sure it was picking up the sound of blood rushing through my veins with my heartbeat
For one, I had programmed dimmer colors for quieter sounds; this made that whole exercise relatively pointless
You are reading snippets from reviews of Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
I fed the audio output of this device into a comparator to convert to the square pulsesI only worried about 3 connections: power (5VDC), ground, and the audio out
You are reading snippets from reviews of Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
I fed the audio output of this device into a comparator to convert to the square pulsesI only worried about 3 connections: power (5VDC), ground, and the audio out
You are reading snippets from reviews of Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
More about Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control [ADA1713]
Add an ear to your project with this well-designed electret microphone amplifier with AGC
This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on
For the amplification, we use the Maxim MAX9814, a specialty chip that is designed for amplifying electret microphones in situations where the loudness of the audio isn't predictable.This fancy microphone amplifier module is a step above the rest, with built in automatic gain control
The AGC in the amplifier means that nearby 'loud' sounds will be quieted so they don't overwhelm & 'clip' the amplifier, and even quiet, far-away sounds will be amplified
This amplifier is great for when you want to record or detect audio in a setting where levels change and you don't want to have to tweak the amplifier gain all the time.The chip at the heart of this amp is the MAX9814 , and has a few options you can configure with the breakout
The default 'max gain' is 60dB, but can be set to 40dB or 50dB by jumpering the Gain pin to VCC or ground
You can also change the Attack/Release ratio, from the default 1:4000 to 1:2000 or 1:500
The ouput from the amp is about 2Vpp max on a 1.25V DC bias, so it can be easily used with any Analog/Digital converter that is up to 3.3V input
If you want to pipe it into a Line Input, just use a 1-100uF blocking capacitor in series (100uF sounds best).For audio-reactive projects, we suggest using an FFT driver library (such as the one in this library) which can take the audio input and 'translate' it into frequencies
If you just need to keep track of audio levels, see our sound-level meter tutorial for Arduino Each order comes with one assembled and tested board, with electret mic pre-soldered on, and a small piece of header
Our tutorial will get you started with using and testing the microphone amplifier and you can check out our general-purpose mic