Check the ratings on the PSU sticker and see if it can supply 30A on the 5v rail.docteur.blanchard wrote:Thanks for your reply.
Do you think that if i use a computer power supply of 300 watts and that i modify the connector to get only the 5v, it should be enough?
Where can i have the usb connection schema to find the + and the - on the usb ?
from http://en.wikipedia.org/wiki/PC_Power_Supplies -> Power rating: ..docteur.blanchard wrote: Do you think that if i use a computer power supply of 300 watts and that i modify the connector to get only the 5v, it should be enough?
That wouldn't be enough.A 3.3 V rail may have a 10 A rating by itself (33 W), and the 5 V rail may have a 20 A rating (100 W) by itself, but the two together may only be able to output 110 W
Not true as the socket is at 240V AC! A better way to think of that is that is about 3000Watts, and a Pi consumes something like 3 Watts. Therefore the limit is more like 1000 Pi's from 1 13 Amp socket. It makes you think when you consider it that way.RaTTuS wrote:as most computer plugs are going to be 13Amp max your not going to be able to supply enough power from one for 36 RPi's ....