# Adafruit Silicon MEMS Microphone Breakout - SPW2430

**Type:** Product page · **SKU:** ADA2716 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/adafruit-silicon-mems-microphone-breakout-spw2430.html ([markdown](https://core-electronics.com.au/adafruit-silicon-mems-microphone-breakout-spw2430.html.md))

Listen to this good news - Adafruit now have a breakout board for a super tiny MEMS microphone. Just like 'classic' electret microphones, MEMS mics can detect sound and...

## Pricing

- **Price:** $9.20 (inc GST) — $8.36 AUD, exc GST
- **Quantity discounts:** 10+ $8.11 (exc GST) · 50+ $7.95 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## Description

Listen to this good news - Adafruit now have a breakout board for a super tiny MEMS microphone. Just like 'classic' electret microphones, MEMS mics can detect sound and convert it to voltage, but they don't need a bias resistor or amplifier, its all in one! The SPW2430 is a small, low cost MEMS mic with a range of 100Hz - 10KHz, good for just about all general audio recording/detection.

This breakout is best used for projects such as voice changers, audio recording/sampling, and audio-reactive projects that use FFT. To keep the breakout small and simple, Adafruit only added a 3V voltage regulator (the microphone requires 3.3V DC) and filter capacitors. No additional opamp is included, the output peak-to-peak voltage has a 0.67V DC bias and about 100mVpp (peak-to-peak) when talking near the microphone, which is good for attaching to something that expects 'line level' input without clipping. The peak-to-peak can be as high as 1Vpp if there's a very loud sound. If you are If you need a [microphone with adjustable gain](https://core-electronics.com.au/electret-microphone-amplifier-max4466-with-adjustable-gain.html) or [auto-gain control](https://core-electronics.com.au/electret-microphone-amplifier-max9814-with-auto-gain-control.html), check out Adafruit's mic+amplifier options. If you need a higher peak-to-peak, [a rail-to-rail op-amp](https://core-electronics.com.au/op-amp-dual-rail-to-rail-2-7-12v-power-at-80ma-output-ts922-ts922in.html) and [some resistors can get you boosted up](https://en.wikipedia.org/wiki/Operational_amplifier_applications#Non-inverting_amplifier)!

Using it is simple: connect GND to ground, Vin to 3.3-5VDC. For the best performance, use the "quietest" supply available (on an Arduino, this would be the 3.3V supply). The audio waveform will come out of the **DC** pin. The output will have a DC bias of 0.67V so when its perfectly quiet that's what you'll read, there's a little drift. If the audio equipment you're using requires AC coupled audio, you can grab the signal out of the **AC** pin, which has a 10uF capacitor in series.

The output pin is not designed to drive speakers or anything but the smallest in-ear headphones - you'll need [an audio amplifier (such as Adafruit's 3.7W stereo amp) if you want to connect the amp directly to speakers](https://core-electronics.com.au/stereo-3-7w-class-d-audio-amplifier-max98306.html). If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the **DC** pin directly to the microcontroller ADC pin.

## Technical Details

- [EagleCAD PCB files on GitHub](https://github.com/adafruit/Adafruit-SPW2430-PCB)
- [Fritzing object in the Adafruit Fritzing Library](https://github.com/adafruit/Fritzing-Library)

Weight: 0.9g

Product Dimensions: 15.8mm x 14.1mm x 2.9mm / 0.6" x 0.6" x 0.1"

 ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/2/7/2716-04.jpg)