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Re: Mic pin voltage

 

Laurence,

You should see about 10V approx.

I think your electret mic polarity is wrong. The solder pad connected to the can of the mic is -ve or grounded.

Raj

At 12/03/2019, you wrote:
Hello

What is the expected mic pin voltage when you press PTT on a v4 and V5 board.
I am seeing 4.8v on V5 seems low to me. The V4 was about 5.2v.

Thanks
Laurence
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