Soooo,useing 12 volt adapter on a 5 volt hub is ok?? Just asking,don't want to fry anything 
Trying to find 5 volt adapters is a real pain,ALL search engines throw 12/9/7.5 volt & any other volt in there,crazy
Trying to find 5 volt adapters is a real pain,ALL search engines throw 12/9/7.5 volt & any other volt in there,crazy
Some hubs won't supply too many mA to each port. Before I understood everything I bought a hub that only supplies 250mA.
I hooked up a 3A 12v supply to compensate and it did not reliably power my raspberry pi or block erupters (even just 1).