Have you ever heard stories about malicious USB thumb drives frying laptops and thought they were far fetched? An electronics engineer heard them, too — then set out to create a prototype. The “USB ...
The reason he's using negative 220 volts (he could just as easily have made it +220 by reversing the leads) is that he's pulling the GND down. The GND connection is the only thing that's common to all ...
[url=http://arstechnica.com/civis/viewtopic.php?p=29944645#p29944645:2c9cfkq5 said: kriket011[/url]":2c9cfkq5]It could be useful in a situation when one needs to ...