Mass USB charging

Just use 3 or 4 power supplies connected in parallel to boost the amps but keep the voltage the same.* :D :D

*Don't actually do this!!!!
 
bekdik said:
What happened when you contacted [email protected] (Technical Assistance) and asked them?
Click to expand...

They agree that it cannot charge 34 devices at 500mA, can charge a few devices, run some flash disks etc. Not exactly meant for a heavy duty charging job.

Might have to return both though since it won't work at all the way it functions now.
 
What about just powering your hub via the 5V output of a standard ATX PC power supply? PC supplies are cheap and usually have decent overcurrent protection. You might need to connect a resistor across two pins to get it to power up.
 
Yotch said:
What about just powering your hub via the 5V output of a standard ATX PC power supply? PC supplies are cheap and usually have decent overcurrent protection. You might need to connect a resistor across two pins to get it to power up.
Click to expand...

This won't pop the hub?
 
Aren't you just using the hub to supply power and not USB data? It seems to me that you could just connect a whole lot of USB extension cables in parallel to the 5V rail of an ATX power supply or am I missing something? If the wiring inside the hub is not too long or too thin it should work (wasn't it working for 15 minutes previously with the 4A supply?).
 
Beachless said:
Most breakers in the DB board for a plug will only be 16amp so your going to have to plan a bit more and check other things as well.
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16A at 220V, not at 5V. There's a lot of headroom on the DB board. (Think 2000W heaters, etc)
 
Yotch said:
Aren't you just using the hub to supply power and not USB data? It seems to me that you could just connect a whole lot of USB extension cables in parallel to the 5V rail of an ATX power supply or am I missing something? If the wiring inside the hub is not too long or too thin it should work (wasn't it working for 15 minutes previously with the 4A supply?).
Click to expand...

One can do this, but as has been mentioned several times, the USB standard is designed around providing a maximum of 500mA. If you connect something straight to the a computer PSU, and the device's electronics up to scratch, you can have 25A flowing through your device, which is not great.

Depending on the circuitry inside your USB Hubs that you currently have, you might be able to get away with putting a beefier PS, or event a computer's PSU onto it, if the Hub's electronics handle the overcurrent issue.

If you have AC chargers for all of the tablets, I really think using them is your best bet. These (see below) are the best devices ever, allow for plugging in two europlugs per standard 3 prong output. Get 3x 6 plug multiplugs, and ample of these adaptors and you're good to go.

FBEMD2.jpg
 
GarethC said:
One can do this, but as has been mentioned several times, the USB standard is designed around providing a maximum of 500mA. If you connect something straight to the a computer PSU, and the device's electronics up to scratch, you can have 25A flowing through your device, which is not great.

Depending on the circuitry inside your USB Hubs that you currently have, you might be able to get away with putting a beefier PS, or event a computer's PSU onto it, if the Hub's electronics handle the overcurrent issue.

If you have AC chargers for all of the tablets, I really think using them is your best bet. These (see below) are the best devices ever, allow for plugging in two europlugs per standard 3 prong output. Get 3x 6 plug multiplugs, and ample of these adaptors and you're good to go.

FBEMD2.jpg
Click to expand...

Best idea of the thread.
 
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