Missing schematic for ReSpeaker 4-Mic Linear Array Kit


I am looking for the schematic for the ReSpeaker 4-Mic linear array kit. The schematic is not available in the wiki. Could you please help?

Reference link:

<LINK_TEXT text=“http://wiki.seeedstudio.com/ReSpeaker_4 … pberry_Pi/”>http://wiki.seeedstudio.com/ReSpeaker_4-Mic_Linear_Array_Kit_for_Raspberry_Pi/</LINK_TEXT>


Hi there,

Sorry, we do not plan to open source the 4 mics schematic. thanks for understanding.


Could you share the pinout on the 40pin header on the Linear 4-Mic board? i need the pinout information so that i can connect the Linear 4-Mic to another system.


Hi there,

here is the 40 pins connection. thanks.


Thanks for the info. With this limited information, could you help to check my understanding?

I just need to enable the audio 4 channel capture to the Ubuntu system. I don’t need the earphone/speaker on the Mic Array kit.

Does it means that i just need to supply the 3.3V to the pin 1?

Do i need to supply 5V to the pin 2?

I will need to program the AC108 codec. So, i believe i need to connect the I2C_SDA to the pin3 and the I2C_SCL to the pin5?

What is the voltage needed by the I2C_SDA and I2C_SCL? (3.3v or 1.8v)?

i will need to provide common ground to the system. Pin 6/9/14/20/25/30/34/39.

I will program the AC108 to master mode. Means that AC108 will supply the PCM_FS and PCM_CLK to my Ubuntu system.

I only interested on Audio capture, so i just need to connect PCM_DAC Pin40 to my Ubuntu I2S_DATA_IN?

The PCM_DAC, PCM_CLK and PCM_FS operate on 1.8V ?

Is there anything i need to connect to the MCLK_EN pin13?


HI there,

here is the System Diagram. It will help to get better understanding the whole system. thanks.