On 10/15/13 02:46, Jan Stary wrote: >> > For what it is worth, I have two BBB's attached to a 2x12x12 block >> > of wood (that's US wood inches, which translates to around the size >> > of a hardbound book), with a five port switch and a seven port USB >> > hub and a power strip screwed to it The BBB's get their power from >> > the USB hub >> >> Don't use the USB connector to power the board, you will have problems >> in the future. The BBB runs at 550mhz by default. Some drivers of u-boot >> (not available yet in the official source code) will check if your board >> is connected to the USB port or the real power connector. The driver >> won't increase the cpu speed to 1ghz if you're using the USB connector. > > Why? >
Higher clock speed => higher power consumption, and there may be issues getting that much power -- cleanly -- through the MicroUSB connector. As it is, I noticed one of my two BBB's keeps losing its network when it is using YP, but seemingly no problem when NOT using YP. I wouldn't be surprised if this proves to be a power problem, but haven't got around to improving the power supply yet. Nick.
