orange pi zero microphone to gpio

peter12 · Published in 2017-3-30 01:39:37

Hello,

I know this is not very Armbian related but no idea where to ask and maybe someone is able to help (because of lack of documentation). I would like to connect this microphone to OPi Zero gpio. It has:
1 5V
2 GND
3 USB-DM2
4 USB-DP2
5 USB-DM3
6 USB-DP3
7 LINEOUTR
8 LINEOUTL
9 TV-OUT
10 MIC-BIAS
11 MIC1P
12 MIC1N
13 CIR-RX

I would like to connect this microphone (picture) to gpio, if I understand it correctly, I need to use MIC-BIAS, MIC1P, MIC1N. But this microphone has just two pins. How should I connect it to gpio please? And what should I activate in Armbian to be able to record from this microphone? (probably alsa, set device, which software to use for recording)

edu_viccini · Published in 2017-3-30 07:46:37

Edited by edu_viccini at 2017-3-30 07:47

You need a circuit to take de audio from MIC:

peter12 · Published in 2017-4-9 17:46:13

Edited by peter12 at 2017-4-9 17:47

Thank you for your message. Please where can I found values for capacitors (C118,C120,C119,C121,C122) and resistors? Some of them they have values and some don't have.
And what is that green part between MIC1P and MIC1N?
I am sorry for newbie questions.

peter12 · Published in 2017-4-10 20:49:16

I made small progress with this scheme. Now I am able to record voice, but is is extremely quiet (I need to set maximum volume on my pc and VLC volume boost up to 200% - and even with these steps recorded voice is very quiet). Any idea please how to boost it?
I tried to maximize everything in alsamixer but it did not help.

edu_viccini · Published in 2017-4-16 09:20:39

Sorry pal i missed this post,

The other's components part, you will find in another OPi schmatics.i post here and not see this

I think , using the right components could fix this!

orange pi zero microphone to gpio

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