Re: What rating for USB hub?
They all vary. I've got 1 here that has a 6v PSU and another that has a 7.5v PSU. Current wise, anything > 2.1amps will be fine.
You'll also need to make sure you have the polarity of the connector the right way around. It'll probably be easier to buy a new 4 port USB hub.
Re: What rating for USB hub?
Okay, thanks - suspected as much - it makes things very simple.
New purchase won't be necessary, though - I have a boxful of psus and lots of different tips that can be attached both ways around. Even failing that, the soldering iron is my friend. ;)
Re: What rating for USB hub?
Trial and error isn't a great way of finding the polarity or required voltage. Cheap electronics are normally quite liable to go pop if they get the polarity wrong.
Re: What rating for USB hub?
The maximum power a usb is allowed to supply is 500 mA. So a 2.1A PSU for a 4 port hub would be reasonable, as it would allow 4 max power devices. Can we have a picture of the power input and the of the hub?
Re: What rating for USB hub?
You may be able to trace the mfr from the FCC id mark.
http://www.hardwaresecrets.com/page/fcc