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In an American forum I came across interesting instructions on how to make some metal-coated laptops immune to these USB sticks that destroy computers. Any overload that goes into the USB port from the outside is grounded via the user. USB and mainboard remain intact
How much electricity are we talking about, do you have to be afraid or does it just tingle in your fingers?
If I understand the so-called "USB killer" correctly, they charge themselves via the normal power supply and then emit a major electric shock via the (presumably data pins). If this is the case, we probably will not use the plate itself, the current runs through the cables or contacts inside:-)
It's just a high voltage, of 200 volts. It destroys the electronics… The current is dangerous - so the amps… Not the volts
It depends on the device. With laptops you can be sure that it is a good blow, which can't be pleasant (high blow could end dangerously). With cell phones it is not as strong as with a PC but it should not be underestimated! All in all, however, one should never play with electricity or conduct it in higher quantities into the body.
Is a kind of ribbon cable with fuse as soon as too much current runs towards the mainboard is grounded via the metal pad and the saboteur gets his own toy
I do not know whether fuses can react so quickly, something in the direction of the optocoupler might make more sense, but I do not know the instructions either; but maybe it would make more sense to simply intercept the "shock"?
Want to say in short?
Would be helpful if we could also see the instructions.
For the user to receive a shock, there should be two separate metal surfaces on the laptop and the person would have to touch both at the same time.
Version 3 of the USB Killer is designed for USB 3 and can distribute approx. 10 beats per second. Since you can normally draw a maximum of 4.5 W via USB 3, the energy per stroke is a maximum of 0.45 J.
200 V at 0.45 J is painful but usually not dangerous. Unless the person has a heart condition, in the worst case it can be fatal. So you should rather leave something like that.
Most electric pasture fences, by the way, deliver 1 - 5 joules per stroke.
So at most half of a pasture fence do you think you can risk that?
