[AudioI] Microphone Input impedance?

[Ron]

Hi Matt,

When I say real microphone,  I mean a microphone of the type that is 
used in a headset.  Should I use the RCA port or the MIC port?

-- 
73,
Ron / W4MMP

On 4/17/2020 23:46, Matt via People wrote:
> 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.
>
-- 
73,
Ron / W4MMP