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notaguru
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 Posted: Mon May 28, 2007 12:11 am Post subject: The mic input --- is there a DC voltage present |
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I need to MAKE a specialized DYNAMIC mic for a laptop. Is there
ordinarily a DC voltage present in those 3.5mm jacks for
electret mics, perhaps? |
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mike
Guest
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| Posted: Mon May 28, 2007 12:32 am Post subject: Re: The mic input --- is there a DC voltage present |
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notaguru wrote:
| Quote: | I need to MAKE a specialized DYNAMIC mic for a laptop. Is there
ordinarily a DC voltage present in those 3.5mm jacks for electret mics,
perhaps?
I tried to adapt phone headsets for my laptops. Results were different |
for different laptops.
The easiest way to make sure is to measure it.
If voltage is present, there'll be a resistor in series.
Otherwise, plugging in a mono microphone would make smoke.
mike
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Barry Watzman
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| Posted: Mon May 28, 2007 6:53 am Post subject: Re: The mic input --- is there a DC voltage present |
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Often; some computer mic inputs are for dynamic mics, some are for
capacitance mics and have a bias voltage across them.
notaguru wrote:
| Quote: | I need to MAKE a specialized DYNAMIC mic for a laptop. Is there
ordinarily a DC voltage present in those 3.5mm jacks for electret mics,
perhaps? |
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M.I.5¾
Guest
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| Posted: Tue May 29, 2007 11:03 am Post subject: Re: The mic input --- is there a DC voltage present |
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"notaguru" <notaguru-obvious@gmail.com> wrote in message
news:f3cl5a$d05$1@registered.motzarella.org...
| Quote: | I need to MAKE a specialized DYNAMIC mic for a laptop. Is there ordinarily
a DC voltage present in those 3.5mm jacks for electret mics, perhaps?
|
If there is, don't worry about it. The supply is strictly limited and won't
upset your dynamic mike. |
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