What is USB killer? Working Principle, Protection

Know about USB Killer

In this post, we are going to know What is USB killer? How a USB killer Works? How to protect your device from USB killer?

What is USB killer?

Nowadays USB killer is a very popular device for it's damaging nature to the electronic devices. It is also called a malicious USB device. It looks like a USB memory card reader and pen drives. But it is very dangerous for your electronics devices.

You can permanently damage an electronic device like mobile, laptop using this USB killer. Let's know how a USB killer works.

How a USB killer Works?

At first, let's see what inside a USB killer. A USB killer consists of few oscillators, Step up transformer and few capacitors. Many USB killers consist of DC to DC converters, capacitors and transistors. But all types of USB killer works the same.

Basically, a USB killer creates a very high negative voltage and then feeds to your electronics devices which causes your device to permanently damage.

At first USB killer takes 5V DC  from your electronic device when you plug in then it using oscillator circuits converts 5V DC to a pulse signal. Then step up transformer steps up the voltage. Capacitor stored the voltage as charge and then feeds to your electronic device. 

How to protect your device from USB killer?

The USB killer has not only disadvantages, but it has also some advantages like it is used for testing purpose and other purposes. But some people may try to damage your device by USB killer. Nowadays many companies like APPLE adding USB killers protectors to their products. Using Opto-isolator you can protect your electronic device. 

Opto-isolator is an electronic component on the motherboard that will exchange electrical signals between two isolated circuits using lights this means that the deadly minus 200 volts cannot travel as far. So your device will be safe from USB killer.

    

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