Adafruit
Adafruit Silicon MEMS Microphone Breakout - SPW2430
The Adafruit SPW2430 Silicon MEMS Microphone Breakout is a compact, low-cost microphone module that detects sound and converts it to an analog voltage — no e...
The Adafruit SPW2430 Silicon MEMS Microphone Breakout is a compact, low-cost microphone module that detects sound and converts it to an analog voltage — no external bias resistor or amplifier needed. With a frequency range of 100 Hz to 10 kHz, it's well suited for general-purpose audio recording, detection, and sound-reactive projects.
The breakout provides both DC-coupled and AC-coupled outputs. The DC pin outputs the audio waveform with a 0.67 V bias (approximately 100 mVpp when speaking nearby, up to 1 Vpp for loud sounds). The AC pin includes a 10 µF series capacitor for equipment that requires AC-coupled audio input.
Key Features
- SPW2430 MEMS Microphone – Built-in amplifier, no external bias or preamp needed
- Frequency Range – 100 Hz to 10 kHz
- DC & AC Outputs – DC pin with 0.67 V bias for direct ADC connection; AC pin with capacitor coupling
- Output Level – ~100 mVpp typical speech, up to 1 Vpp for loud sounds (line-level compatible)
- 3.3–5 V Power – Onboard 3 V regulator; best performance on a quiet 3.3 V supply
- Compact Size – Minimal board with just the mic, regulator, and filter capacitors
Ideal For
- Audio-reactive projects using FFT
- Voice changers and audio recording/sampling
- Sound level detection and monitoring
- Line-level audio input to recording equipment
Package Contents
- 1× Adafruit SPW2430 Silicon MEMS Microphone Breakout
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- MEMS microphone
- A tiny microphone made using micro-electromechanical systems, the same style of miniature manufacturing used in many phone sensors. It lets the board detect sound without needing an external microphone, which is useful for noise-reactive projects and simple audio input.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
Find this product in
Audio & Video
Brands
Sensors & Input
Related Tutorials
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