Inside the Apple iPad - Photos

In article <[email protected]>, owl <[email protected]>
wrote:

> In comp.os.linux.advocacy nospam <[email protected]> wrote:
> > In article <[email protected]>, owl <[email protected]>
> > wrote:
> >
> >> Do you understand the concept of "hit or miss"? (see below).
> >
> > yes i do, and it's not hit or miss at all.
> >
> > usb can't provide enough power for a lot of devices, including
> > bus-powered hard drives. why is that ok but the ipad isn't?
>
> Whether or not it's "ok" is irrelevant. It either works for all USB ports
> or it doesn't. The fact is that it does not work for all USB ports. That
> makes it "hit or miss".
>
No, that means you have to know something about two possible states for
your USB ports before you can know where to charge it more efficiently:
You need to know whether they are high-power USB ports or not.

'nospam' is also pointing out that people have had to check this for
many other USB devices, as well; it's not a new factor in using USB.

---

› See More: Inside the Apple iPad - Photos

On 2010-04-28, wetpixel <[email protected]> wrote:
>
>
> In article <[email protected]>, owl <[email protected]>
> wrote:
>
>> In comp.os.linux.advocacy nospam <[email protected]> wrote:
>> > In article <[email protected]>, owl <[email protected]>
>> > wrote:
>> >
>> >> Do you understand the concept of "hit or miss"? (see below).
>> >
>> > yes i do, and it's not hit or miss at all.
>> >
>> > usb can't provide enough power for a lot of devices, including
>> > bus-powered hard drives. why is that ok but the ipad isn't?
>>
>> Whether or not it's "ok" is irrelevant. It either works for all USB ports
>> or it doesn't. The fact is that it does not work for all USB ports. That
>> makes it "hit or miss".
>>
> No, that means you have to know something about two possible states for
> your USB ports before you can know where to charge it more efficiently:

It's too bad they didn't ship it with one of those dual head USB plugs
that come with some drives. You can get more power for the device that way.
It's a pretty simple work around really. You would have thought it would
have occured to Apple.

> You need to know whether they are high-power USB ports or not.
>
> 'nospam' is also pointing out that people have had to check this for
> many other USB devices, as well; it's not a new factor in using USB.


--


Some people have this nutty idea that in 1997 |||
reading to a hard disk and writing to a hard disk / | \
both at the same time was something worth patenting.

On Apr 28, 2:18*pm, JEDIDIAH <[email protected]> wrote:
> On 2010-04-28, wetpixel <[email protected]> wrote:
>
>
>
>
>
>
>
> > In article <[email protected]>, owl <[email protected]>
> > wrote:
>
> >> In comp.os.linux.advocacy nospam <[email protected]> wrote:
> >> > In article <[email protected]>, owl <[email protected]>
> >> > wrote:
>
> >> >> Do you understand the concept of "hit or miss"? *(see below).
>
> >> > yes i do, and it's not hit or miss at all.
>
> >> > usb can't provide enough power for a lot of devices, including
> >> > bus-powered hard drives. why is that ok but the ipad isn't?
>
> >> Whether or not it's "ok" is irrelevant. *It either works for all USBports
> >> or it doesn't. *The fact is that it does not work for all USB ports.*That
> >> makes it "hit or miss".
>
> > No, that means you have to know something about two possible states for
> > your USB ports before you can know where to charge it more efficiently:
>
> * * It's too bad they didn't ship it with one of those dual head USB plugs
> that come with some drives. You can get more power for the device that way.
> It's a pretty simple work around really. You would have thought it would
> have occured to Apple.
>
> > You need to know whether they are high-power USB ports or not.
>
> > 'nospam' is also pointing out that people have had to check this for
> > many other USB devices, as well; it's not a new factor in using USB.
>
> --
>
> * * * * Some people have this nutty idea that in 1997 * * ** * * * *|||
> * * * * reading to a hard disk and writing to a hard disk * ** * * / | \
> * * * * both at the same time was something worth patenting.

Apple likes to add 1 feature a month and resell the same product to
the Mactards dozens of times. They are brainwashed cultists so it's
not that hard.

In article <[email protected]>, JEDIDIAH
<[email protected]> wrote:

> It's too bad they didn't ship it with one of those dual head USB plugs
> that come with some drives. You can get more power for the device that way.
> It's a pretty simple work around really. You would have thought it would
> have occured to Apple.

two won't provide enough power, plus it's a total hack.

In message <280420101608429359%[email protected]> nospam
<[email protected]> was claimed to have wrote:

>In article <[email protected]>, JEDIDIAH
><[email protected]> wrote:
>
>> It's too bad they didn't ship it with one of those dual head USB plugs
>> that come with some drives. You can get more power for the device that way.
>> It's a pretty simple work around really. You would have thought it would
>> have occured to Apple.
>
>two won't provide enough power, plus it's a total hack.

Given that the iPad can apparently run from USB power *or* slow-charge
from USB power, but not both together, it stands to reason that it could
do both if it had access to both.

However, it wouldn't just take a hacky USB cable, the iPad would have to
mount as a device on both ports to request to run at high power mode, so
this would dramatically increase engineering costs for relatively
minimal gain.

Firewire might be better since there's a little more power available,
but again, a lot of engineering for relatively minimal gain, especially
when you can just tell your audience to take a power adapter with them.

What I'd really like to see is an iPad power adapter with multiple USB
ports, so that I can charge my iPad, iPhone and BT headset all off the
same adapter. I can get multiple-USB walwarts in the market already,
but nothing that will power the iPad properly.

In article <[email protected]>, DevilsPGD
<[email protected]> wrote:

> However, it wouldn't just take a hacky USB cable, the iPad would have to
> mount as a device on both ports to request to run at high power mode, so
> this would dramatically increase engineering costs for relatively
> minimal gain.

true.

> Firewire might be better since there's a little more power available,
> but again, a lot of engineering for relatively minimal gain, especially
> when you can just tell your audience to take a power adapter with them.

ironically, apple removed firewire entirely just 2 years ago. it would
have been very nice for ipad charging.

> What I'd really like to see is an iPad power adapter with multiple USB
> ports, so that I can charge my iPad, iPhone and BT headset all off the
> same adapter. I can get multiple-USB walwarts in the market already,
> but nothing that will power the iPad properly.

i'm sure there will be ipad capable power adapters soon enough.

nospam <[email protected]> wrote in news:290420100004559184%
[email protected]d:

>> What I'd really like to see is an iPad power adapter with multiple USB
>> ports, so that I can charge my iPad, iPhone and BT headset all off the
>> same adapter. I can get multiple-USB walwarts in the market already,
>> but nothing that will power the iPad properly.
>
> i'm sure there will be ipad capable power adapters soon enough.
>
>

http://cgi.ebay.com/Mini-USB-2-0-HUB...eed-MAC-Power-
Supply-/390174498079?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item5ad8365d1f

$20, 10 USB ports, full speed hub, 500ma per port for charging, $20

Even works off a 5V car power supply in the mobile....not included.
AC power supply is included.

Oh, wait....There's no USB port on iPad to plug into it....damn!
Never mind......

--
Creationism is to science what storks are to obstetrics.

Larry

Larry <[email protected]> writes:

> nospam <[email protected]> wrote in news:290420100004559184%
> [email protected]d:
>
>>> What I'd really like to see is an iPad power adapter with multiple USB
>>> ports, so that I can charge my iPad, iPhone and BT headset all off the
>>> same adapter. I can get multiple-USB walwarts in the market already,
>>> but nothing that will power the iPad properly.
>>
>> i'm sure there will be ipad capable power adapters soon enough.
>>
>>
>
> http://cgi.ebay.com/Mini-USB-2-0-HUB...eed-MAC-Power-
> Supply-/390174498079?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item5ad8365d1f
>
> $20, 10 USB ports, full speed hub, 500ma per port for charging, $20
>
> Even works off a 5V car power supply in the mobile....not included.
> AC power supply is included.
>
> Oh, wait....There's no USB port on iPad to plug into it....damn!
> Never mind......

Who told you that?

In article <[email protected]>, Larry
<[email protected]> wrote:

> $20, 10 USB ports, full speed hub, 500ma per port for charging, $20
>
> Even works off a 5V car power supply in the mobile....not included.
> AC power supply is included.
>
> Oh, wait....There's no USB port on iPad to plug into it....damn!
> Never mind......

so what's the usb cable that comes in the box for, which will plug
right into that hub?

In message <[email protected]>
Hadron<[email protected]> was claimed to have wrote:

>Larry <[email protected]> writes:
>
>> Oh, wait....There's no USB port on iPad to plug into it....damn!
>> Never mind......
>
>Who told you that?

Apple. The iPad has a Dock Connector port which has USB pinouts, but no
USB port.

In message <[email protected]> Larry
<[email protected]> was claimed to have wrote:

>nospam <[email protected]> wrote in news:290420100004559184%
>[email protected]:
>
>>> What I'd really like to see is an iPad power adapter with multiple USB
>>> ports, so that I can charge my iPad, iPhone and BT headset all off the
>>> same adapter. I can get multiple-USB walwarts in the market already,
>>> but nothing that will power the iPad properly.
>>
>> i'm sure there will be ipad capable power adapters soon enough.
>>
>>
>
>http://cgi.ebay.com/Mini-USB-2-0-HUB...eed-MAC-Power-
>Supply-/390174498079?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item5ad8365d1f
>
>$20, 10 USB ports, full speed hub, 500ma per port for charging, $20
>
>Even works off a 5V car power supply in the mobile....not included.
>AC power supply is included.
>
>Oh, wait....There's no USB port on iPad to plug into it....damn!
>Never mind......

Per the specs, the link you quoted supplies "up to 500mA per port"
whereas the iPad comes with a 2A power adapter.

The iPad will charge off of that item, but only in slow-charge mode and
only if the iPad is in standby at the time.

DevilsPGD <[email protected]> wrote:

> Apple. The iPad has a Dock Connector port which has USB pinouts, but no
> USB port.

sure, but there isn't much need for a usb port with everything on apple
products being wireless... usb is a legacy port, like scsi don't forget.

Oxford wrote:

> DevilsPGD <[email protected]> wrote:
>
>> Apple. The iPad has a Dock Connector port which has USB pinouts, but no
>> USB port.
>
> sure, but there isn't much need for a usb port with everything on apple
> products being wireless... usb is a legacy port, like scsi don't forget.

Go drink your Apple Kool-Aid and leave COLA alone.

--
RonB
"There's a story there...somewhere"

Todd Allcock <[email protected]> wrote:

> > sure, but there isn't much need for a usb port with everything on apple
> > products being wireless... usb is a legacy port, like scsi don't forget.
>
>
> That explains iTunes' ability to sync wirelessly over WiFi...
>
> ...oh, wait a minute, I meant Zune's ability...

iTunes syncs wirelessly over WiFi, that was added in version 9, yes, it
hasn't been rolled down to the small devices because of slow wifi speed
(802.11g) & battery concerns, but it's there.

http://www.apple.com/itunes/features/#bonjoursharing

http://theappleblog.com/2009/09/11/i...-home-sharing/

In article <[email protected]>, Oxford
<[email protected]> wrote:

> iTunes syncs wirelessly over WiFi, that was added in version 9,

no it does not.