Bought mine at Sri Computer Low Yat.
RM23
Comes with 5V 1.0A adapter.

I'm thinking of cutting off the 5V line to prevent backfeed.
Will that stop the hub completely like when you turn off the side switch?

How about putting a diode across the cut line to prevent backfeed and yet to use the hub with or without the power adapter?

Will it?
As I understand electricity, having extra amperes won't blow your hub or devices attached to it unless one of the device draws excessive current.
However having a higher voltage certainly will.
Also this hub is suppose to have over-current protection to prevent overload though I don't know if it at port level or for the whole hub or by how much.
Anybody care to experiment?
Report back here please...

Crack one open.
Only way to tell

Anybody here got a GPIO IR receiver working?
How to enable the remote function?

Yup! I already found that page and successfully created the lircd.conf file.
But can't get Raspbmc to see the remote signal
Also there is no Remote Tab in Programs>Raspberry Settings window so I can't do Step 5

oops! repeat post

This post has been edited by totally_skint: Jan 25 2013, 02:20 AM

The 5V 1.0A adapter that comes with this hub measures 5.9V at the jack.
But after you plug into the hub and power the Pi from one of the ports>micro USB, I get fluctuating readings from below 4V to above 5V at TP1 & TP2
Hub was not connected to Pi USB port.

Recently I bought the VZTech USB strip hub and tried to cut off the backfeed by cutting off the Ground and 5V+ line and powering it off the power adapter.
It didn't work on my PC.
Even though the blue light came on it wasn't detected by the PC until I reconnected the Ground line.
Can anyone tell me why that is so?
The instructions I see online for powering hubs without backfeed was to cut off both the Ground and 5V+ line

I did not actually cut off the lines (too aggressive) but connected to the hub like in the picture below.
The hub's cable (bottom) is plugged into a dual USB port salvaged from a PC motherboard.
A cable from an external HDD (top) completes the connection to the PC.
The necessary lines GND, D+, D- are jumpered with a short wire.

Will test on RPi next.

Got my Pi working powered from hub via micro USB cable.
No backfeed as Vcc line disconnected.
Keyboard and pendrive plugged into hub.
Running RaspBMC with GPIO IR receiver and remote from cheap China DVD player.
Successfully networked to internet the other day.
Was able to stream Youtube smoothly too at 480P (haven't tried higher yet)

I used two Samsung travel adapter both 5V 700mA
One worked flawlessly the other boots but won't power my usb keyboard or pendrive.
The working one came from Galaxy Mini measures 4.52V at TP1/TP2
The other one comes from an S2 measures 5.28V at TP1/TP2
I'm guessing the S2 travel adapter doesn't provide enough current?

I'm now using 2A power adapter taken from media player.
Reads 5.13V at TP1/TP2

The VZTech adapter outputs 5.9V at the jack and fluctuates all over the place at the Pi TP.
Keeps rebooting.

What yu_wang said.

What are you running?

So, do your own live dubbing with different voices for your cousin's benefit and entertainment.

I think most (if not all) start with a media centre like RaspBMC before trying other stuff.

No cash & carry?

Minimalist Headless Pi

Which shop and how much?

Keep us posted as to how long it takes to arrive.
We all know E14 is fast.

Can someone explain to me how the two diodes (D1, D2) here protect the circuit?

Also why the 1N4008 since the voltages involved her are so low.
Won't the 1N4001 do as well?

PSU for Pi.
http://elinux.org/RPi_5V_PSU_construction

I know diodes only allow one way flow of current.
What I don't get is how it works in this circuit.