Datasheet

Connect the Left and Right pins together (the microphone is mono out) to the

negative side of the capacitor - yellow wires.

Connect the center ground pin to the battery ground - blue wire

Test!

Now try listening to sounds on the headphones, you should notice a strange 'effect' where

you can hear people from further away than your hearing is used to! Try setting the Gain

pin to the GND pin to get 10dB more gain. You can also remove the Gain wire, to set the

gain to 60dB but you may find the gain is way too high, and it sounds 'too noisy', so we

suggest sticking to 40 or 50dB for most purposes.

You can also try adjusting the A/R (attack/response) ratio by connecting the A/R pin to VDD

or GND but we found that the default no-wire works pretty well for most purposes.

Do more!

Now that you have the amplifier tested, you can use this microphone amp just like our non-

AGC board.

Check out http://learn.adafruit.com/adafruit-microphone-amplifier-breakout/measuring-

sound-levels (http://adafru.it/d9p) and http://learn.adafruit.com/adafruit-microphone-

amplifier-breakout/more-cool-projects (http://adafru.it/d9q) for other projects that can be

adapted to use this amplifier.

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

max9814

Page 10 of 12