Datasheet

Wiring and Test

The microphone amp is thankfully quite simple to get started. No microcontroller or

programming required. We suggest wiring it up directly with a battery pack and headphones

to start while you get a hang of how the AGC acts and responds.

You'll need a 3 or 4 AA/AAA battery pack (http://adafru.it/727)(or some external source of

3-5VDC) - we suggest batteries since they are very electrically-quiet compared to USB or

wall power adapters.

You'll also need a headphone jack, this breadboard-friendly one (http://adafru.it/1699)

works great, and a 1 to 100uF electrolytic capacitor. This is just to protect your headphones

from the DC bias voltage. Just about any capacitor will work.

Find the 'cheapest' headphones you have, or use earbuds, they wont load down the

https://learn.adafruit.com/adafruit-agc-electret-microphone-amplifier-

max9814

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