Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control
Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Control is backordered and will ship as soon as it is back in stock.
Delivery and Shipping
Delivery and Shipping
Delivery Options
We offer several delivery choices to fit your needs:
- FREE Delivery: $0. Enjoy Free AusPost Parcel Standard Delivery on orders over $100 in value. Exclusions may apply.
- AusPost Untracked Letter: $3. Delivery in 3-8 business days (untracked). No refunds or replacements without proof of receiving the order.
- AusPost Parcel Standard: $9. Tracked delivery in 2-6 business days.
- AusPost Parcel Express: $13. Express tracked delivery in 1-3 business days.
- Pickup: $0. Email us to arrange a pickup from our location in Huntingdale 3166 in Melbourne at support@zaitronics.com.au. More details can be found in our contact page.
Additional Information
- Non-metro addresses in WA, NT, SA & TAS may require extra time.
- Certain batteries (like LiPo) cannot be shipped by air, affecting Express Post availability.
- We recommend selecting tracked options for valuable items. Untracked orders will not receive tracking numbers or refunds without proof of delivery.
- Note: Wherever possible, we will combine orders to save on shipping and reduce packaging waste.
- Note: Orders containing backordered item will delay delivery until all items are available
Warranty & Refund Policy
Warranty & Refund Policy
Warranty & Refund Policy
- Standard Warranty: 12 months for all products. Low-cost hobby parts have a 90-day warranty unless safe handling is shown.
- Exceptions: Kits and interfaceable electronics may not be covered if damaged due to misuse.
- Returns: Contact support via your order confirmation email within 14 days of purchase. Items must be unopened and in original packaging. Proof of purchase is required.
- Defective/Damaged Items: Notify us within 30 days for a free refund or replacement. Exclusions apply.
- Return Shipping Costs: Paid by the customer unless the item is defective. Shipping costs are non-refundable.
Adafruit Electret Microphone Amplifier - MAX9814 with Auto Gain Con...
Add an ear to your project with this well-designed electret microphone amplifier with AGC. This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, we use the Maxim MAX9814, a specialty chip that is designed for amplifying electret microphones in situations where the loudness of the audio isn't predictable.
This fancy microphone amplifier module is a step above the rest, with built-in automatic gain control. The AGC in the amplifier means that nearby 'loud' sounds will be quieted so they don't overwhelm & 'clip' the amplifier, and even quiet, far-away sounds will be amplified. This amplifier is great for when you want to record or detect audio in a setting where levels change and you don't want to have to tweak the amplifier gain all the time.
The chip at the heart of this amp is the MAX9814, and has a few options you can configure with the breakout. The default 'max gain' is 60dB, but can be set to 40dB or 50dB by jumpering the Gain pin to VCC or ground. You can also change the Attack/Release ratio, from the default 1:4000 to 1:2000 or 1:500. The output from the amp is about 2Vpp max on a 1.25V DC bias, so it can be easily used with any Analog/Digital converter that is up to 3.3V input. If you want to pipe it into a Line Input, just use a 1-100uF blocking capacitor in series (100uF sounds best).
For audio-reactive projects, we suggest using an FFT driver library (such as the one in this library) which can take the audio input and 'translate' it into frequencies. If you just need to keep track of audio levels, see our sound-level meter tutorial for Arduino
Each order comes with one assembled and tested board, with an electret mic pre-soldered on, and a small piece of header. Our tutorial will get you started with using and testing the microphone amplifier and you can check out our general-purpose microphone amplifier tutorial for other project ideas and code.
Technical Details
- Board Dimensions: 26mm x 14mm / 1" x .6"
- EagleCAD PCB, Fritzing object, datasheets and more in the tutorial
Revision History:
- As of December 12, 2022 – we've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen - you may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen.
This product can be found here: