{"id":8608172104,"title":"Adafruit Electret Microphone Amplifier - MAX4466 with Adjustable Gain","handle":"electret-microphone-amplifier-max4466-with-adjustable-gain","description":"\u003cp\u003e\u003cspan\u003eAdd an ear to your project with this well-designed electret microphone amplifier. This is a fully assembled and tested board.  For the amplification, Adafruit used the Maxim MAX4466, which is an op-amp. The amplifier has excellent power supply noise rejection, so this amplifier sound is clear and isn't nearly as noisy or scratchy as other mic amp breakouts.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThis breakout is best used for projects such as voice changers, audio recording\/sampling, and audio-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x. That's down to be about 200mVpp (for normal speaking volume about 6\" away) which is good for attaching to something that expects 'line level' input without clipping, or up to about 1Vpp, ideal for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eUsing it is simple: connect GND to ground, VCC to 2.4-5VDC. For the best performance, use the \"quietest\" supply available (on an Arduino, this would be the 3.3V supply). The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC\/2 so when its perfectly quiet, the voltage will be a steady VCC\/2 volts (it is DC coupled). If the audio equipment you're using requires AC coupled audio, place a 100uF capacitor between the output pin and the input of your device. If you're connecting to an audio amplifier that has differential inputs or includes decoupling capacitors, the 100uF cap is not required.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe output pin is not designed to drive speakers or anything but the smallest in-ear headphones - you'll need an audio amplifier if you want to connect the amp directly to your speakers.\u003c\/span\u003e\u003cspan\u003e If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT pin directly to the microcontroller ADC pin.\u003c\/span\u003e\u003c\/p\u003e","published_at":"2017-03-16T14:12:00-04:00","created_at":"2017-01-30T19:22:45-05:00","vendor":"kjdElectronics","type":"Adafruit","tags":["Sensors","Sound"],"price":690,"price_min":690,"price_max":690,"available":true,"price_varies":false,"compare_at_price":695,"compare_at_price_min":695,"compare_at_price_max":695,"compare_at_price_varies":false,"variants":[{"id":29778534792,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"Y1A-MOB-MR4","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Adafruit Electret Microphone Amplifier - MAX4466 with Adjustable Gain","public_title":null,"options":["Default Title"],"price":690,"weight":0,"compare_at_price":695,"inventory_quantity":11,"inventory_management":"shopify","inventory_policy":"deny","barcode":"1063"}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1063-03.jpg?v=1489687386","\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1063-04.jpg?v=1489687389","\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1063-05.jpg?v=1489687391"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1063-03.jpg?v=1489687386","options":["Title"],"content":"\u003cp\u003e\u003cspan\u003eAdd an ear to your project with this well-designed electret microphone amplifier. This is a fully assembled and tested board.  For the amplification, Adafruit used the Maxim MAX4466, which is an op-amp. The amplifier has excellent power supply noise rejection, so this amplifier sound is clear and isn't nearly as noisy or scratchy as other mic amp breakouts.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThis breakout is best used for projects such as voice changers, audio recording\/sampling, and audio-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x. That's down to be about 200mVpp (for normal speaking volume about 6\" away) which is good for attaching to something that expects 'line level' input without clipping, or up to about 1Vpp, ideal for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eUsing it is simple: connect GND to ground, VCC to 2.4-5VDC. For the best performance, use the \"quietest\" supply available (on an Arduino, this would be the 3.3V supply). The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC\/2 so when its perfectly quiet, the voltage will be a steady VCC\/2 volts (it is DC coupled). If the audio equipment you're using requires AC coupled audio, place a 100uF capacitor between the output pin and the input of your device. If you're connecting to an audio amplifier that has differential inputs or includes decoupling capacitors, the 100uF cap is not required.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe output pin is not designed to drive speakers or anything but the smallest in-ear headphones - you'll need an audio amplifier if you want to connect the amp directly to your speakers.\u003c\/span\u003e\u003cspan\u003e If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT pin directly to the microcontroller ADC pin.\u003c\/span\u003e\u003c\/p\u003e"}

Adafruit Electret Microphone Amplifier - MAX4466 with Adjustable Gain

Product Description

Add an ear to your project with this well-designed electret microphone amplifier. This is a fully assembled and tested board.  For the amplification, Adafruit used the Maxim MAX4466, which is an op-amp. The amplifier has excellent power supply noise rejection, so this amplifier sound is clear and isn't nearly as noisy or scratchy as other mic amp breakouts.

This breakout is best used for projects such as voice changers, audio recording/sampling, and audio-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x. That's down to be about 200mVpp (for normal speaking volume about 6" away) which is good for attaching to something that expects 'line level' input without clipping, or up to about 1Vpp, ideal for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp.

Using it is simple: connect GND to ground, VCC to 2.4-5VDC. For the best performance, use the "quietest" supply available (on an Arduino, this would be the 3.3V supply). The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC/2 so when its perfectly quiet, the voltage will be a steady VCC/2 volts (it is DC coupled). If the audio equipment you're using requires AC coupled audio, place a 100uF capacitor between the output pin and the input of your device. If you're connecting to an audio amplifier that has differential inputs or includes decoupling capacitors, the 100uF cap is not required.

The output pin is not designed to drive speakers or anything but the smallest in-ear headphones - you'll need an audio amplifier if you want to connect the amp directly to your speakers. If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT pin directly to the microcontroller ADC pin.

$6.90 $6.95
Maximum quantity available reached.
  • 20-20KHz electret microphone soldered on
  • The Maxim MAX4466 for amplification
  • On the back, we include a small trimmer pot to adjust the gain.
  • Weight: .3 ounces
  • Dimensions: 1.9 x 0.6 x 0.4 inches