Electret Microphone Circuit Arduino

1713 add an ear to your project with this well designed electret microphone amplifier with agc.

Electret microphone circuit arduino.

The amplifier has excellent power supply noise rejection so this amplifier sounds really good and isn t nearly as noisy or. The circuit starts with the electret microphone. An electret microphone is a device that uses two conducting plates to capture sound waves and translate them into electrical waves. The positive terminal goes into an analog terminal of the arduino.

For the amplification we use the maxim max4466 an op amp specifically designed for this delicate task. The sparkfun electret microphone breakout couples an electret microphone 100hz 10khz with a 60x mic preamplifier to amplify the sounds of voice claps door knocks or any sounds loud enough to be picked up by a microcontroller s analog to digital converter. The negative terminal connects to gnd on the arduino. The complete circuit is shown below.

How to connect the microphone circuit to an arduino. Components 1 x electret microphone adafruit max4466 1 x arduino uno 1 x breadboard jumper wires setup arduino sketch inspect serial monitor 9600 for sensor values converted to volts. Adafruit industries unique fun diy electronics and kits electret microphone amplifier max9814 with auto gain control id. An electret microphone is an omnidirectional microphone which means it can capture sound from all directions.

We will connect it in our case to a0 of the analog terminal. This electret microphone in particular needs 2 2v of power in order to. Electret microphone amplifier simple arduino example to print out noise level values using a microphone adafruit max4466. This fully assembled and tested board comes with a 20 20khz electret microphone soldered on.

As stated the microphone needs power in order to operate. The output signal again comes from pin 5 of the lm386 ic. Now that we know all the components we are going to use we will go over the circuit schematic for the electret microphone shown below. The 1063 is an electret microphone amplifier with adjustable gain.