Need help?
Currency
Login / Signup
Need help?
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 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.
[Description provided by Adafruit]
.
Returns
We offer exchanges or refunds for defective products within 30 days from the date of purchase.
To be eligible for a return, your item must be in the same condition that you received it. You will also be required to return the item along with its original packaging. Flammable goods, such as batteries, are exempt from being returned.
To request for a refund or exchange, please send us an email at contact@makersupplies.sg with a copy of your receipt or proof of purchase, and provide details on the suspected defect.
If eligible for defect inspection, please send your items to the following address via trackable Singapore Post Tracked Package:
MAKERSUPPLIES SG PTE LTD
BLOCK 4009 ANG MO KIO AVENUE 10
#03-36 TECHPLACE I
SINGAPORE 569738
State your name, order number and return address on the back of the envelope. Postage costs for returned parcels will be borne by customers. If the product defect is found to be true upon inspection on our side, then we will initiate the exchange or refund process.
NOTE: Please do not send your item/s back before receiving an acknowledgement email from us.
Exchanges
Same-item exchanges will be approved on a case-by-case basis and are subjected to the following factors:
If you are eligible for an exchange, we will arrange for the exchanged item/s to be delivered to your address at no additional charge.
However, if no reasonable defect is found, you will be responsible for paying for your own re-shipping fees.
Depending on where you live, the time it may take for your exchanged product to reach you may vary.
Refunds
If an exchange for the defective item is not viable, we will offer a refund instead.
Upon approval, your refund will be processed to your credit card or original method of payment.
Late or missing refund
If you have not received a refund yet, please check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at contact@makersupplies.sg.
Sale items
Sale items cannot be refunded or exchanged.
Free Shipping all year round!
Free 1 to 3 days local shipping for orders above S$200!
No GST charges!
No hidden charges, our prices are as-is!
We ship internationally!
Get our products shipped to you, where ever you are! Prices are in Singapore Dollars.
Bulk Discounts Available!
Email us at contact@makersupplies.sg to get a quote!