Wed Mar 09, 2011 7:48 am
There is no way to power rb from usb port. Usb port is giving 5V and max 500mA so about 2,5 watts. RB433 require minimum 10 volts and 4 watts without wireless cards and much more watts with wireless cards. So even making some dc to dc converter, usb would not supply enough power.
You can get 12V from hard drive power connectors inside. That should work. They are giving tens of amps when power is on.