I'm trying to build a Raspberry Pi cluster (at least 32 Pi's) and I need a convenient way to power them all. So I'd like to design a power distribution board. The distribution board will have USB power ports for each Pi and it will be controlled by an Atmel microcontroller.
I currently have a 350W 5V supply, which can safely supply a hefty 60A. Assuming that each Pi will draw between 800mA and 1A, I should have more than enough power.
With that said, as a new engineer (who specializes in digital electronics), I've only designed one PCB before. I've never done anything with high power before. What design considerations should I take into account when designing the PCB?
I've done a little bit of research and everything seems to point to using a PCB bus bar to carry the high current. I would then branch off the bus to each individual Pi. The other option is to use a high power connector like this one. I'm kind of leaning towards the latter.
With that said I should also probably provide some level protection circuitry for the Pi's in case of a power surge (although my supply, a Cotek AK-350-05, should be able to provide a fair amount of protection itself). I was thinking of placing a 1.5A PTC in series with each USB port.
Are there any other things I should consider? Thanks