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 microphone

amp as much! This is not a good time to use your huge Sennheiser cans. Don't connect to

speakers or you will get really horrible feedback effects

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

max9814

Page 8 of 12