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In Reply to: RE: FLAC Music Player that supports a USB Hard Drive?................ posted by E-Stat on April 08, 2016 at 14:57:35
In the example link that you gave : "Dual-Purpose Wall Charger: 5V/2A charger powers the hub for accelerated data transfer, and also charges your phone."It is the wall charger that has an output of 5V/2A, not the hub. Also note that the wall charger powers the hub. It does not charge it as the hub has no power storage (battery). It is not portable in the sense of usable in transit (though it is small enough to be carried easily).
Edits: 04/08/16Follow Ups:
"Dual-Purpose Wall Charger: 5V/2A charger powers the hub...That tells us what is required to power the hub.
Also note that the wall charger powers the hub.
That's the whole raison d'etre for the wall wart, n'est-ce pas?
It does not charge it as the hub has no power storage (battery)
Right. The Jockery Battery with it's 5V/2A output can directly power the hub (like it does my Touch player - "Look Ma, no AC!") using a similar USB cable!
Get it now?
Edits: 04/08/16 04/08/16
" Get it now? ". Yes I do. How about you?I am not talking about external battery power supplies like the Jockery Giant which you have introduced into the thread. I have specifically referred to the powered USB hub that you provided a link to. This cannot be used in transit i.e to power a personal portable music player as per the OP's need. Unless, of course, the OP only wants to use the player at home in a static situation. But this would counter the whole point of owning a portable player so I don't expect that to be his requirement.
Now I will talk about external battery supplies. The Jockery Giant doesn't appear to help. A portable (2.5") USB HDD drive has only one connector. This is used simultaneously to transfer power and data. The Jockery appears only to have power output on its USB outlets, so as to charge external devices. I cannot see anywhere that it can also send data from one device to another. Its manufacturer clearly describes it only as a charger and says nothing about any data connectivity. So it might power up the HDD but there would not be any functionality.
I gather that you are suggesting using both. The Jockery powering the hub. OK, I'll admit that may be feasible but if portable that set up may have to fit in the OP's pocket (where portable muisc cplayers normally reside)which I think is impractical.
Edits: 04/08/16 04/08/16
" Get it now? ". Yes I do.
Unfortunately, you don't . Sigh.
This cannot be used in transit i.e to power a personal portable music player as per the OP's need.
Not only can it , but I have shown an alternative power supply that can fully replace the normally AC powered wall wart.
A portable (2.5") USB HDD drive has only one connector.
Yes. You connect that to the hub. Which as anyone who has ever used one understands that a USB hub supplies both signal and power.
The Jockery appears only to have power output on its USB outlets, so as to charge external devices.
Or, to power them directly.
I cannot see anywhere that it can also send data from one device to another.
Nor can the wall wart that it replaces. All it does is power the hub.
I gather that you are suggesting using both.
To state the obvious, the answer is yes. You opined that a powered hub could only be driven by wall current. That is most certainly not the case.
OK, you win :-)
It's not a matter of (me) winning. My profession across many decades is based upon problem solving. That's the point of the thread, right?You seem to experience difficulty thinking outside the (your) box.
I presume you are aware that batteries directly supply current to other mobile devices like this:
Edits: 04/08/16
It seems that my attempt to end the thread lightly and humorously (you did see the smiley?) failed.
Yes I do think that solving the OP's problem is the point. Why do you think that insulting me helps in this?
I was hoping (sooner than later) you'd respond with "Now I get it!"
Alas, I think you still don't understand the notion of powering a USB hub with a battery to support 2.5" hard drives.
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