USBCheck - First Line of Defense Against Bad USB Ports

Have you ever plugged in a USB device only to discover the root port (the ones in the front of a PC case) destroyed everything from motherboard to the peripheral itself? That's largely because the computer's USB header is wired incorrectly - the worst case being when the +5V wire swapped with the Ground wire. This is where USBCheck comes in.

When inserted, the USBCheck dongle can check whether the polarity is correct for the power wiring on your USB ports. When the on-board LED emits red light, this warns you polarity is reversed, meaning no way in hell you should plug anything into the troubled port. Even if the LED flickers on and off, that's also an indicator that you've a bad power connection. Paranoid geeks may find the USBCheck to be the first line of defense against sme faulty public PCs at any net cafe, libraries and schools.

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