Today's Message Index:
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1. 06:30 AM - Re: 5 Volt Converter Product Review (user9253)
2. 11:39 AM - Airport Cafe's Now Listed in ACC's (gbrasch)
3. 01:35 PM - Re: Re: 5 Volt Converter Product Review (Eric Page)
Message 1
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| Subject: | Re: 5 Volt Converter Product Review |
Eric,
Please verify that the "D-" data pin has a positive voltage even though it is labeled
with a minus sign.
Also, I assume that computers do not have voltage on the data pins because that
would interfere with data transfer. Is that correct or wrong?
Thanks, Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464510#464510
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| Subject: | Airport Cafe's Now Listed in ACC's |
I have just added over 50 airport cafs (and still growing) to current listings
in the Airport Courtesy Cars website and app (just in case your courtesy car isnt
available when you arrive!) These listings are highlighted in red so you can
easily find them. If you have any additions or corrections, please email them
directly to me at airportcars101@gmail.com. Thanks and Happy New Year! Glenn
PS, Submit your ramp fee's experience also for inclusion in the website/app!
--------
Glenn Brasch
RV-9A Flying
Medevac Helicopter Pilot (Ret)
Owner, "Airport Courtesy Cars" Smart Phone App
and www.airportcourtesycars.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464547#464547
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| Subject: | Re: 5 Volt Converter Product Review |
Yes, for charging adapters, both voltages are positive. The D+ and D- labels refer
to their use in USB data communications.
You're correct. A computer's USB port won't have a constant voltage on the data
pins like a charger has, but the voltage will rise and fall at very high speed
to send digital data.
Apple computers probably have a chip in the USB data path that communicates with
their Lightning cable authentication chip (speculation on my part).
As I mentioned in another post, there are dedicated charging port chips that sense
the attached device and configure the data pin voltages appropriately.
Eric
> On Dec 31, 2016, at 6:29 AM, user9253 <fransew@gmail.com> wrote:
> Eric,
> Please verify that the "D-" data pin has a positive voltage even though it is
labeled with a minus sign.
> Also, I assume that computers do not have voltage on the data pins because that
would interfere with data transfer. Is that correct or wrong?
> Thanks, Joe
>
> --------
> Joe Gores
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