Amazing USB memory 'USB Killer' that physically destroys the PC when plugged into the port


Zsolt Andrasi

The USB port is an indispensable connection terminal for using a PC, such as data transfer using a USB memory, charging of a smartphone, and wired connection with an external device. The terrifying device that physically destroys the PC when plugged into such a USB port is ' USB Killer ', and the developer has clarified the mechanism in the blog.

USB Killer

One of the computer's interfaces, the USB port, has security elements that include an ESD diode that protects the unit from static electricity, a filter element, and the physical layer of the USB interface. In the case of PCs manufactured in recent years, these physical mechanisms are built into one chip, and in the case of older PCs, the north bridge and south bridge mounted on the board are responsible for these functions. Was there.

'USB Killer' is to destroy such a chipset by burning it out, and in the worst case, destroy the PC itself.

The developer first mounts the parts on his own board and verifies the operation ...

The actual model is created by manually soldering the printed circuit board ordered from a Chinese manufacturer.

The finished device looks like a general USB memory.

The basic principle of 'USB Killer' is very simple. When this is plugged into a USB port, the DC / DC converter is operated in the reverse of normal operation to charge the capacitor with a voltage of -110V. When the voltage reaches -110V, the DC / DC converter will stop and at the same time the transistor will open and -110V will be sent to the signal line of the USB interface. And when the voltage of the capacitor becomes -7V, the transistor closes and the DC / DC converter starts operating again, and this is repeated endlessly. This loop will eventually destroy the USB port, and if you are unlucky, it is possible that the USB port side half of your PC will be completely damaged. As for the reason for using negative voltage in 'USB Killer', the developer commented that 'negative voltage is easier to rectify.'

The developer has not clarified what kind of use 'USB Killer' has, but in the sense that 'it may be useful if you have it, but you should never use it'. It's like a bomb. '

in Hardware, Posted by logu_ii