rephlex writes: "There are multiple Raspberry Pi users on the official Troubleshooting forum experiencing hardware problems with their Pi. It appears the Raspberry Pi has problems with USB, specifically with powering peripherals that require 140 mA or more. That situation causes a voltage drop that results in the USB voltage becoming out of specification. This has resulted in malfunctions with USB devices such as Wi-Fi dongles, even when connected to the Pi via a powered hub. Also, there appears to be Ethernet problems caused by this "excessive" (but well within USB specifications) current draw: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=6&t=6037"
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