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USB killer v2.0
From: Razer <[email protected]>
On 10/15/2015 03:22 AM, Georgi Guninski wrote:
>>Â http://www.theregister.co.uk/2015/10/14/sneaky_220v_usb_fries_laptops/
>> An internet mischief maker has built a USB stick that delivers dangerous
>> 220-volt shocks to PCs, destroying them in the process.
>Tentatively speaking, No. I don't think so... The circuitry is designed
>for 5 volts, and the capacitance available throughout the device is so
>low almost no current would be available either.
Sorry, but you are wrong there. Â The amount of power available through a typical USB connection is probably many hundreds of milliamps, at 5 volts. Â And this power could be converted, by a switching power supply, to hundreds or even thousands of volts, and stored in an internal capacitor. Â Once switched on, internally, and applied back to the data signals, the device could easily fry a few levels of circuitry in the computer. Â It would be essentially unrepairable.
      Jim Bell, N7IJS.  The World's Last Tech-Plus Ham
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