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'[EE]: How to adapt a dynamic mic'
2003\10\16@185602 by Mauricio Jancic

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Hello,
       I have a SENNHEISER microphone and would like to adapt it to my
PC sound card. It apears to be a dynamic mic. It has tree wires one to
the case of the mic, and the other two from 2 coils around it. It also
has a series diode(?) on one of the wires (actually I'm not shure it is
a diode, but the case is similar to the 1N4148 trhu hole case)

       Anyone knows how to do this?

Best regards

Mauricio

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2003\10\16@190642 by Rick C.

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Most professional mics have the same pinout. Pin 2 +, pin 3 -, pin 1 shield
on the XLR connector. Output is balanced, low impedance.
Your sound card has two pins, unbalanced, high impedance. Depending on your
sound card and drivers there should be enough audio level to be sufficient.
Tie pin 1 and 3 to the shield or ring of a 1/8 plug obviosly using a single
conductor shielded cable. Tie pin 2 to the tip of the 1/8 jack. If there
isn't sufficient audio, you may have to use a mic preamp.

Remember to go to the record menu to set the levels. When you bring up the
playback default menu, go to the options or preferences and check the
record option.

That "diode" is probably a rf bypass capacitor.

Rick C. WTRM-FM

Mauricio Jancic wrote:

{Quote hidden}

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2003\10\16@193801 by Mauricio Jancic

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Ok, so, lets supouse it is a capacitor, so that pin should be ? + or -?

Should i leave de cap?

By "the ring" of the plug (stereo) you mean the center conector or the
one that is close to the wire?

Thanks

Mauricio Jancic
Janso Desarrollos
Microchip Consultant
(54) - 11 - 4542 - 3519

{Original Message removed}

2003\10\16@195455 by Rick C.

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Leave the "capacitor", or whatever it is in place. The "tip" is the center
or hot pin. The ring is the shield or ground. I probably should have said
"sleeve". I'm so used to three conductor stereo jacks with tip, ring sleeve.
There may also be an issue with some sound cards that do use a stereo mic
input. In this case, if you only want to use a mono mic, you must still hook
the pin 2 of the mic to the tip and pin 1 & 3 to the shield. Leave the ring
open.

You could tie the tip and ring together. This will provide mic audio to both
left and right mic inputs if your sound card does have a stero mic input. Be
aware that if you hook it up this way and plug it into a mono jack, you may
short the mic and you will get no audio.
Rick

Mauricio Jancic wrote:

> Ok, so, lets supouse it is a capacitor, so that pin should be ? + or -?
>
> Should i leave de cap?
>
> By "the ring" of the plug (stereo) you mean the center conector or the
> one that is close to the wire?
>
> Thanks
>
>
> {Original Message removed}

2003\10\16@200948 by Mauricio Jancic
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Sorry to insist, but the "capacitor" or what ever, should be on the pin
(+) or (-) ?

Mauricio Jancic
Janso Desarrollos
Microchip Consultant
(54) - 11 - 4542 - 3519

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2003\10\16@202157 by Rick C.

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It normally goes across the + and - in a balanced circuit. Since you are
unbalancing it by tying pin 3 to shield, it will electrically be going
across the + (pin 2) and ground.
Hope that helps.
Rick

Mauricio Jancic wrote:

> Sorry to insist, but the "capacitor" or what ever, should be on the pin
> (+) or (-) ?
>
> Mauricio Jancic
>

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2003\10\16@210400 by Robert Ussery

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----- Original Message -----
From: "Mauricio Jancic" <spam_OUTjancicTakeThisOuTspamARNET.COM.AR>

> By "the ring" of the plug (stereo) you mean the center conector or the
> one that is close to the wire?

                 _________________
       _________|*****************\
______/         |*****************|-------------~
/      |         |*****************|             ~
\______|         |*****************|-------------~
      \_________|*****************/
^^^^    ^^^^^^^
"tip"    "ring"

- Robert

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