[AudioI] Microphone Input impedance?

[Matt]

On 18/4/20 5:24 am, Ron via People wrote:
> Hello,
>
Hi


> My application using the audioinjector (zero) calls for a real 
> microphone for the input to the audioinjector.    I assume I need to 
> use the MIC holes on the PCB to attach a microphone.   But what is the 
> input impedance of that connection?
>
When you say "real microphone" what do you mean ? The connector is for 
an electret microphone, however you may be able to modify it for a 
different microphone.


> Related to this.   How do I determine the +/- of the supplied microphone?

The microphone typically has a 2.5V requirement for biasing. If you have a voltage meter you can confirm that voltage is on the positive line.

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