Note: This tutorial covers the SparkFun Analog MEMS Microphone - VM2020 (BOB-21537). While this tutorial was based on the previous MEMS microphone tutorials, this version of the MEMS microphone is a differential microphone and was designed for noisy environments. For specific details regarding the microphone ICs, refer to the Documents tab on their product pages or the previous release of this Hookup Guide:
The SparkFun Analog MEMS Microphone Breakout makes it easy to work with the Vesper VM2020 analog microphone. The VM2020 is an ultra-high Acoustic Overload Point (AOP), high dynamic range, differential analog output piezoelectric MEMS microphone. What separates this from other analog MEMS microphones is that it was designed to be used in loud environments.
Read this guide to get an overview of the breakout board and how to use it, including its technical specifications, how to hook it up to a microcontroller, and example code to get started!
Required Materials
To follow along with this tutorial, you will need the following materials at a minimum. You may not need everything though depending on what you have. Add it to your cart, read through the guide, and adjust the cart as necessary.
The IoT RedBoard is an ESP32 WROOM-equipped development board that has everything you need in an Arduino Uno with extra perksā¦
$29.95
Amplifier and Differential ADC Converter
Since the analog pins on an Arduino microcontroller are usually single-ended, you will need a way to amplify the signal to a reasonable level. You will also need an differential ADC converter. We recommend using the audio codec breakout WM8960. The audio codec can amplify the signal to a reasonable level and already has input pins for a differential microphone.
The SparkFun WM8960 Audio Codec Breakout is a low-power, high-quality stereo codec with 1W Stereo Class D speaker drivers andā¦
$17.95
Tools
Building a circuit using this breakout requires some assembly and soldering. You may already have a few of these items but if not, the tools and hardware below help with that assembly.
This assortment of tools is great for those of you who need a solid set of tools to start your workbench on the right foot!
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Prototyping Accessories
Depending on your setup, you may want to use IC hooks for a temporary connection. However, you will want to solder header pins to connect devices to the plated through holes for a secure connection. Depending on your application, you could use straight headers or right angle headers. Of course, you could also solder wire as well.
A row of right angle male headers - break to fit. 40 pins that can be cut to any size. Used with custom PCBs or general custoā¦
$2.25
Recommended Reading
To successfully use the SparkFun MEMS microphone breakout board, you'll need to be familiar with Arduino microcontrollers, analog (aka ADC) input, and sound waves. For folks new to these topics, check out the following resources to get a feel for the concepts and verbiage used throughout this tutorial.
The SparkFun Audio Codec Breakout - WM8960 is a low power, high quality stereo codec chock full of features. In this tutorial, some of these features by using an Arduino microcontroller to configure the audio codec and pass audio to the headphone or speaker channels.
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