raspberry pie AC108 Audio decoding module Intelligent voice recognition 4Microphone smart speaker DIY
LC AC108 module carry X-POWER company Audio decoder chip and 4 channel silicon microphone array. for raspberry Pi designed Audio sound card expansion board , low power consumption, stereo code, support for high quality voice capture, also can used for DIY smart sound such as tianmao jingling ，Google Assistant etc.
1. base on Raspberry Pi 40pin interface,Suitable for Raspberry Pi series motherboards
2.support Raspberry Pi Zero/Zero W/2B/3B/3B+/4 etc development board
3.adopt AC108 Low power stereo code chip, can via I2S interface Communicate.
4.onboard 4 high quality MEMS silicon microphone,can make recording on left and right channel
5. onboard 12 programmable APA-102-2020 full color LED.
6.power supply : plug in raspberry pi get 5V and 3.3V power.
7.Logic voltage : 3.3V
8.Raspberry pi control interface:12C audio port: 12S, raspberry Pi captures voice through the I2C interface to control the microphone array,Then send the voice signal to the Raspberry Pi via the I2S interface. Finally, the audio output is output by the 3.5mm headphone holder/HDMI interface of the Raspberry Pi;
9.provide refer document , match raspberry pi can DIY the function of smart speaker similar tianmao jingling ，xiaodu speaker ,Google Assistant。
hardware introduction and description
Board size：65*65mm weight： 20g
1，MIC1--MIC4: 4 simulate MEMS silicon microphones.
2,D1--D12：12 APA102 full color LED,connect to raspberry pi SPI interface .
3,Raspberry Pi 2*20P pedestal, support Raspberry Pi Zero/Zero W/2B/3B/3B+/4 etc.
4,AC108: Have I2S/TDM output conversion functional Highly integrated 4 channel ADC.
5，GPIO12：Grove digital port,connect to raspberry Pi's GPIO12and GPIO13
6, I2C：Grove I2C interface, connect to the Raspberry Pi's I2C-1.