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Adafruit 1713 Electret Microphone Amplifier - MAX9814 with Auto Gain Control
Brand Adafruit
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Description & Details
Summary
- Electret mic with AGV amplifier
- Selectable gain 40, 50, 60dB
- Dimensions 26 x 14mm (1 x 0.6in.)
- Adafruit part no.: 1713
Adafruit 1713 Electret Microphone Amplifier - MAX9814 with Auto Gain Control Description
The Adafruit Electret Microphone AGC Amplifiers feature a built-in microphone and use the MAX9814 microphone amplifier. The amplifier's automatic gain control will reduce loud sounds and amplify the quiet ones to minimise volume related distortion. You can configure the maximum gain to 40, 50 or 60dB and the Attack/Release ratio to 1:4000, 1:2000 or 1:500 via jumper settings.
The amplifier's output is approximately 2Vpp with a 1.25V DC bias making it suitable for sampling with a 3.3V analogue to digital converter (ADC) without the need for a blocking capacitor. However, if you want to connect one to a Line Input then use a blocking capacitor of between 1 and 100µF unless you have a differential amplifier or it already has its own blocking capacitor.
Get started quickly using Adafruit's tutorial for this board showing how to wire one up to a set of headphones. Having mastered that, you can move on to connecting one to a microcontroller. Adafruit have a tutorial and FFT library for the Arduino which extracts frequency information from the audio and another which is a sound level tutorial.
Supplied with a fully assembled amplifier board, and a strip of 0.1in. header pins for you to solder on if required.
- Electret mic with AGV amplifier
- Selectable gain 40, 50, 60dB
- Dimensions 26 x 14mm (1 x 0.6in.)
- Adafruit part no.: 1713
Details
| OPC | P697RKM |
|---|---|
| Brand | Adafruit |
| Codes | 0700598870817 (EAN) |
| MPN | 1713 |
External product information
Disclaimer: The information below is provided by various external sources and should be used as a guide only.
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).
Alternative names:
- Adafruit 1713 development board accessory Microphone amplifier
Detailed Product Information
Features
| Compatibility | Arduino |
|---|---|
| Brand compatibility | Adafruit |
| Product type | Microphone amplifier |
Weight & dimensions
| Width | 26 mm |
|---|---|
| Depth | 14 mm |
Technical details
| Sustainability certificates | RoHS |
|---|---|
| Compliance certificates | RoHS |
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