Our Great Maker Giveaway competition is open. $8000 of Maker Favourites up for grabs! × [hide]

empowering creative people

Breakouts & Modules > Audio

Adafruit Silicon MEMS Microphone Breakout - SPW2430

SKU: ADA2716

$8.50 AUD, inc GST
$7.73 AUD, exc GST

More Views

Adafruit Silicon MEMS Microphone Breakout - SPW2430
8.5 AUD

SKU: ADA2716

$8.50 AUD, inc GST
$7.73 AUD, exc GST
In stock, ships today if ordered before 2PM
Delivered by Wed, 22nd of Nov

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 or auto-gain control, check out Adafruit's mic+amplifier options. If you need a higher peak-to-peak, a rail-to-rail op-amp and some resistors can get you boosted up!

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. 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

Weight: 0.9g

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

This product is listed in:

Documentation and Resources:
  • Sound Effects Button
  • The idea for this project came when a friend of mine flew over from Western Australia to visit, and during his stopover in Adelaide, he did what any adult would do; visit the airport novelty store and buy some random stuff. It was pretty much all junk, except for this big green dome button which played a different, comic voice saying ‘YES’ every time you pressed it. Simple, but, it entertained us on the drive from Syd...

Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.