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