MAX4466 Microphone Preamplifier Module — Adjustable Gain

MAX4466 Microphone Preamplifier Module — Adjustable Gain

The MAX4466 microphone preamplifier module features an electret microphone and a MAX4466 op-amp preamplifier with adjustable gain (25× to 125× via on-board trimmer). Outputs an analog audio signal centered at VCC/2 — connect directly to an Arduino analog input for sound level detection, voice recording, and audio processing projects.

Key Features

• ✅ Adjustable gain — 25× to 125× via on-board trimmer potentiometer
• ✅ Electret microphone included — no external mic needed
• ✅ Analog output — centered at VCC/2, direct connection to Arduino ADC
• ✅ Low noise — MAX4466 op-amp for clean audio signal
• ✅ 2.4–5.5V supply — compatible with 3.3V and 5V Arduino boards
• ✅ RoHS compliant

Key Specifications

• IC: MAX4466 | Gain: 25×–125× adjustable
• Supply: 2.4–5.5V | Output: Analog (VCC/2 centered)

Typical Applications

• Arduino sound level detection and VU meter
• Voice-activated trigger and clap detection
• Audio spectrum analysis with FFT
• Microphone input for voice recording projects

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