Microphone amplifier (MAX4466)
Electret microphone with a MAX4466 amplifier · 2.4–5.5 V · output sits at V_CC/2 and swings with sound (gain set by the trimmer, ×50) · now hearing 70 dB SPL at 440 Hz
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: Adafruit-style MAX4466 electret mic amplifier
Pins
- OUT
- GND
- VCC
Ratings and limits
| Supply | 2.4–5.5 V |
|---|---|
| Gain | 25–125 (trimmer) |
| Output | V_CC/2 ± swing |
How to use it
Sample OUT with analogRead and look at the swing around mid-rail (peak-to-peak over 50 ms) for loudness, or run an FFT for pitch.