Hey! An oportunity to plug my expandora system!
USB Hubs
- Thread starter Garg
- Start date
Hey! An oportunity to plug my expandora system!
Here is a simple explanation of a complex process to get what you want. I suggest visiting your local hacker space to see if there is someone who can help you. http://hackerspaces.org/wiki/List_of_Hacker_Spaces
1. Find a USB hub you can disassemble and gut the components from.
2. Reverse Engineer the circuit board.
3. Design your own replacement board
4. Solder everything together
I am working toward doing this myself, should I make progress I will certainly let you know.
1. Find a USB hub you can disassemble and gut the components from.
2. Reverse Engineer the circuit board.
3. Design your own replacement board
4. Solder everything together
I am working toward doing this myself, should I make progress I will certainly let you know.
bismuthdrummer
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Copying a psx game to my Patriot 8GB stick while writing this post with a Netgear WNA1000M (both through a hub). Surfing seems to work just fine. I checked the current draw of each and they both never really get above 250 mA while in use. I don't know what the consequences of bumping up against the 500 mA limit are, however.
I am not sure where the current draws for the other wifi adapters on the wiki come from, my adapter sits at 100 mA idle (just plugged in) and uses around 200 mA while transmitting. Checked using cat current_now under the battery in the terminal.
It causes the Pandora to report low battery and then shut down, even when plugged in.
bismuthdrummer
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I couldn't replicate this.
Nothing plugged in: -290 mA
Added USB 4-port hub: -440 mA
Added wifi adapter: -586 mA
Added flash drive: -710 mA
Added USB 3.0 HD: -1,264 mA
Added Sony Walkman: -1,300 mA
Unplugged hub: -368 mA
Waited: -298 mA
So I actually see the battery reporting 1 A usage from 4 USB devices plugged in (no external power sources) all while listening to Audacious, with no ill effects.
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slaeshjag
¯\_(ツ)_/¯
That's weird, the step-up circuit for 5 V is only designed for 500 mA cont, 750 mA peak. Anything over that should cause bad things to happen. I also kinda remember somebody talking about a 1 A fuse?
bismuthdrummer
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Interesting.
So is what I just attempted with my expensive and cherished device normally classified as 'stupid'? ^_^
So is what I just attempted with my expensive and cherished device normally classified as 'stupid'? ^_^
Darkknight512
Active Member
That's not 1A off the USB though, that's 1A off the battery, depending on the voltage of the battery and the efficiency of the 5V power supply in the Pandora, more like 500 - 700 mA.
Lets say the battery is at 3.8v, so you are getting 3.8 x 1 = 3.8 watts. 3.8 watts / 5 volts is 760 mA, 760 * 0.9 (10% inefficient boost converter to get 5 volts, just a guess) gives us 684 mA off the USB port. A little over our limit, but should still be within the chips capabilities maybe with some voltage sag (4.9v instead of 5v). USB 5 volt voltage is allowed to be within 4.75 and 5.25 volts.
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slaeshjag
¯\_(ツ)_/¯
Good point, forgot about that.
bismuthdrummer
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Thanks for the clarification.
I would also note for the record that the hard drive was blinking the whole time, when normally the light on it stays solid shortly after plugging it in... I didn't try to copy anything to or from it, but I am guessing it wasn't getting enough juice to be usable.
// Back to the original topic ==>
I would also note for the record that the hard drive was blinking the whole time, when normally the light on it stays solid shortly after plugging it in... I didn't try to copy anything to or from it, but I am guessing it wasn't getting enough juice to be usable.
// Back to the original topic ==>
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Nintendo
Nintendo Switch
Cool, I never knew that. Thank you from me as well.
Darkknight512
Active Member
Stick your ear to it, you will either hear a hum, or clicking and it struggling to spin up. My drive will do that on my laptop, but not my desktop.
TheGrandPubaa
AIUI this should fit your needs, but might block the right trigger button.
http://www.dealextre...ter-black-65802
AIUI this should fit your needs, but might block the right trigger button.
http://www.dealextre...ter-black-65802
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TheGrandPubaa
Member
That looks interesting, but it would definitely block the shoulder button. Also, it uses the OTG port, which would free up the main USB port, but would it provide enough voltage to run a flash drive?
S
StreaK
Guest
Any usb-hubs and usb lan adapters from ebay that's worth to mention? [with links please 
]
]
Prometheus
Well-Known Member
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^ I would imagine that most of the ones on eBay are actually just being drop-shipped from DealExtreme. At least, that's been my experience of looking for such things.
dgame
Active Member
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These work with Pandora:
http://www.dealextre...sb-2-0-hub-7980
http://www.dealextre...hub-black-31667
http://www.dealextre...mallest-hub-468
http://www.ebay.com/...e-/330526418797
They all support a (not included) external power supply. The all have the same product and vendor ID.
The last one from Targus incldes a USB splitter cable that can use power from another USB port. I use it with an USB wall charger.
I also have the Griffin Smartshare USB and these hubs are generally better as some devices I have (USB Ethernet adapter) don't work with the Smartshare. Using a very short USB cable (or adapter) these little hubs use less space than the Smartshare. And in my case it also flips the USB ports to the correct side up.
You also can get away with a higher USB load if the charger is plugged into the Pandora.
http://www.dealextre...sb-2-0-hub-7980
http://www.dealextre...hub-black-31667
http://www.dealextre...mallest-hub-468
http://www.ebay.com/...e-/330526418797
They all support a (not included) external power supply. The all have the same product and vendor ID.
The last one from Targus incldes a USB splitter cable that can use power from another USB port. I use it with an USB wall charger.
I also have the Griffin Smartshare USB and these hubs are generally better as some devices I have (USB Ethernet adapter) don't work with the Smartshare. Using a very short USB cable (or adapter) these little hubs use less space than the Smartshare. And in my case it also flips the USB ports to the correct side up.
You also can get away with a higher USB load if the charger is plugged into the Pandora.
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I8NY
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- Sep 11, 2010
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- 216
I got this one and it works fine (unpowered 1.1 and 2.0)
http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10307&cs_id=1030702&p_id=6631&seq=1&format=2
http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10307&cs_id=1030702&p_id=6631&seq=1&format=2
I've just ordered this one http://www.play.com/PC/PCs/4-/20251644/-/Product.html hoping I will get both a USB hub plus lots of additional storage from one device in the USB port. I'll let you know how it works.
Dave
Dave
