Descriptions:
100%Brand New and High Quality
Using max9814 microphones amplification + pam8406 power amplifier design, high sensitivity, suitable for a 3.6 v to 4.2 v lithium batteries bone conduction speakers or bone conduction headphone driver, for the use of hearing AIDS.Potentiometer with power switch, convenient to control.
Note: since the board overall sensitivity is higher, is only applicable to bone conduction speaker drivers, do other USES will be whether appropriate.Audio output is not total GND, two negative can not be together.
AGC switch:
With short circuit cap,the AGC function close.No connect short circuit cap,the AGC open
Release ratio and gain Settings, please refer to below:
A/R = GND: start/release ratio of 1:500
A/R = VDD: start/release ratio of 1:2000
A/R = dangling: start/release than 1:40 00
Gain control:
GAIN = VDD, GAIN is set to 40 db
GAIN = GND, GAIN is set to 50 db
GAIN = dangling, no compression GAIN setting 60 db
The basic parameters:
The board size: 50 mm * 20 mm
Working voltage:DC 3 v to 5.5 v
Board wiring row needle spacing: 2.54 mm
Packaging
1pcs*MAX9814 Electret microphones amplification board With Pam8406 amplifiers AGC Function
Aftermarket commitments:
1, Our commitment to the sale of goods 100% integrity assurance, if you have any question for the products, please contact us directly,
our basically 24-hour online customer service will patiently answer you
2, If you are not satisfied with our products, you can request a refund or exchange.
We will actively coordinate and process your request. If the product does not work, we will full refund.
But require the buyer to return the product by advanced freight, we will refund the freight you pay after getting and confirming the product status.
On the sign:
Please carry out inspection before you sign to check the number of parts shortages or discrepancies, etc.;
If so, please contact us at the contact details on the express orders.