binarural headset-> sterero recorder 3.5mm adapter

24/05/2015 - 14:36 von Mathias Kőrber | Report spam
I have a Binaural Headset from Livescribe, orginally intended
for use with their Livescribe pens

http://store.livescribe.com/livescr...set-1.html

This of course has stereo recording and playback.
All on one 3.5mm connector (4 rings, 5 contact areas).

Does anyone have an idea whether there is an adaptor
for this to make it into a standard 3.5mm stereo mike
(ie blank out the headphone function) or how to hack this into a 3.5mm
mike only?

I suspect I could cut the wires and add a switch to disable the
headphone function. Only question is whether the remaining
pinout is compatible with standard stero jacks (GoPro etc)

I also don't yet know the pinout for their 5-conductor plug.

Any pointers are appreciated
 

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#1 Marcel Mueller
24/05/2015 - 19:22 | Warnen spam
On 24.05.15 14.36, Mathias Kőrber wrote:
I have a Binaural Headset from Livescribe, orginally intended
for use with their Livescribe pens

http://store.livescribe.com/livescr...set-1.html

This of course has stereo recording and playback.
All on one 3.5mm connector (4 rings, 5 contact areas).



I have never seen this kind of plug and none of my distributors have
matching female jacks.

Does anyone have an idea whether there is an adaptor
for this to make it into a standard 3.5mm stereo mike
(ie blank out the headphone function) or how to hack this into a 3.5mm
mike only?



Once you manage to get a matching jack, it is possible to split it into
two 3,5mm stereo plugs.

I suspect I could cut the wires and add a switch to disable the
headphone function. Only question is whether the remaining
pinout is compatible with standard stero jacks (GoPro etc)



No, it isn't. This one is longer than usual 3,5mm jacks. So the shield
will never reach the sound cards ground contact spring. Or you drive the
tip too deep into the female plug, maybe causing damage.

I also don't yet know the pinout for their 5-conductor plug.



Well most likely the outermost ring is common ground (headphone and
mic), and the Mic and Headphone connectors can be distinguished with a
cheap multimeter. Headphone is the one with low impedance. Typically
less than 100 Ohms against ground.

Any pointers are appreciated



Sorry, no real Solution.

If you know about soldering and you do not longer need the original plug
you could cut the wire and connect some short segments with two stereo
plugs. But be sure to use shielded wires, especially for the microphone
part.

However, to use the microphone you need a matching microphone amplifier.
If it is an electret condenser type you will probably need T-power.
Sound devices with stereo input /and/ T-power are quite seldom. At this
point a power injection with a 9V battery could be helpful too.


Marcel

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