Post by thread:[EE]: How to adapt a dynamic mic

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 -- Outgoing mail is certified Virus Free. Checked by AVG Anti-Virus (http://www.grisoft.com). Version: 7.0.193 / Virus Database: 260.2.0 - Release Date: 16/10/2003 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

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}> 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 > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

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}

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}

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 -- Outgoing mail is certified Virus Free. Checked by AVG Anti-Virus (http://www.grisoft.com). Version: 7.0.193 / Virus Database: 260.2.0 - Release Date: 16/10/2003 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

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 > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

----- Original Message ----- From: "Mauricio Jancic" <spam_OUTjancicTakeThisOuTARNET.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 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.