Electret Microphone Amplifier - MAX4466 with Adjustable Gain
We have ✅ 6 available of the AF-1063 in our Sydney warehouse.
A well-designed electret microphone amplifier breakout built around the Maxim MAX4466 op-amp, specifically engineered for microphone amplification with excellent power supply noise rejection. The board comes fully assembled and tested with a 20–20 kHz electret microphone soldered on.
A trimmer pot on the back lets you adjust gain from 25× to 125×, producing output from approximately 200 mVpp (line-level, suitable for audio equipment) up to about 1 Vpp (ideal for microcontroller ADC input). The output is rail-to-rail and DC-coupled with a bias of VCC/2.
Key Features
- MAX4466 Op-Amp – Low-noise amplifier designed specifically for electret microphones
- Adjustable Gain – 25× to 125× via onboard trimmer pot
- Wide Frequency Response – 20 Hz to 20 kHz electret microphone
- Rail-to-Rail Output – Up to 5 Vpp on loud sounds
- Low Power – Operates from 2.4–5 V DC
- Fully Assembled – Microphone pre-soldered, ready to use
Specifications
- Amplifier IC: Maxim MAX4466
- Gain Range: 25× to 125× (adjustable)
- Output at Normal Speech (~6"): ~200 mVpp (25×) to ~1 Vpp (125×)
- Operating Voltage: 2.4–5 V DC
- Output Bias: VCC/2 (DC coupled)
- Frequency Range: 20 Hz – 20 kHz
Wiring
- VCC – 2.4–5 V (use the quietest supply available, e.g. 3.3 V on Arduino)
- GND – Ground
- OUT – Audio waveform output (DC biased at VCC/2)
Ideal For
- Audio-reactive LED projects using FFT
- Voice changers and audio effects
- Sound level monitoring and sampling
- CircuitPython and Arduino audio projects
Package Contents
- 1× Electret Microphone Amplifier Breakout (MAX4466, fully assembled)
Resources
The Electret Microphone Amplifier - MAX4466 with Adjustable Gain appears in the following collections:
