I believe I have seen this in the past. An Arduino board that has like 10 USB ports on it. A separate power supply to give it 500ma per port. But the most important thing is that is has several LED lights on each USB port to show current status.....like powered on, connected to slave.....data sending.....data receiving.....error condition.
Anyone seen this type of card? I have seen units with 4 downstream USB but only one LED per channel. That is not enough for what I need to do. Much thanks. tjcooper