On 08/04/17 00:06, Rodolfo Medina wrote:
David Christensen <dpchr...@holgerdanske.com> writes:
One more question that might explain the ring -- do the
microphones have switches?
They don't. The two ones that come with headsets have volume control
wheel, but I don't know if it is for the headsets only.
My first guess would be that the volume control is a stereo logarithmic
potentiometer wired between the earpieces plug and the earpieces.
Electronic test equipment might provide more clues.
On 08/04/17 00:06, Rodolfo Medina wrote:
David Christensen <dpchr...@holgerdanske.com> writes:
What is the make and model of your netbook?
It's an Acer Aspire One, and the model should be ZG8.
When I go to the Acer support page:
https://www.acer.com/ac/en/US/content/drivers
"ZG8" is not a valid model number -- it should be something like "AO521".
If your netbook has a stereo microphone/ line-in connector, then you
might be able to make stereo recordings by patching the left microphone
to the tip (+) and sleeve (-) and the right microphone to the ring (+)
and sleeve (-). (e.g. the negatives are commoned).
Do the headsets have one or two phone plugs? What color or
colors? What size or sizes -- original 1/4 inch, miniature 3.5 mm,
or sub-miniature 2.5 mm?
They all have one green 3.5mm stereo plug.
So, one green stereo 3.5 mm miniature phone plug for the earpieces and
one black stereo 3.5 mm miniature phone plug for the microphone?
As you know the make and model, perhaps you can find the specifications
and/or contact technical support to ask them what signals are connected
to the tip, ring, and sleeve.
I have a Logitech headset that came with a Logitech webcam. Neither
have an obvious model or part number on them. The headset has:
- One black stereo 3.5 mm miniature phone plug with a headphone symbol
- One pink stereo 3.5 mm miniature phone plug with a microphone symbol.
Checking the DC resistances between the tip, ring, and sleeve of the
microphone plug using my Fluke 77 DMM:
tip-ring 0.3 Ohm
tip-sleeve 1080 Ohm
ring-sleeve 1079 Ohm
I expect that the headset microphone is monophonic, the signal common
is wired to the plug sleeve, and the signal hot is wired to the plug tip
and ring in parallel.
Checking the DC resistances of the earpieces plug:
tip-ring 46.1 Ohm
tip-sleeve 23.8 Ohm
ring-sleeve 24.3 Ohm
using some jumper cables, and playing some music on my computer, I
expect that the two earpieces are monophonic, the earpiece negative
terminals are wired to the plug sleeve, the left earpiece positive
terminal is wired to the plug tip, and the right earpiece positive
terminal is wired to the plug ring.
What size are the phone plugs on the non-headset microphones?
Same: 3.5mm, stereo. All of them.
Color?
David
