This guy made a USB kill switch for his laptop for $20, and you can make one too

Picture this: you brought your shiny new gaming laptop to Starbucks to play a few rounds of Fortnite, but someone walks up, grabs your PC, and takes off. Your laptop was unlocked, so now they could potentially access your passwords, private messages, and other personal information. Michael Altfield presents an interesting solution on his personal blog: the “BusKill.”

Altfield built the BusKill for around $20, using a cheap USB drive (which is kept on your person), a keyring, a magnetic USB breakaway adapter, and a 1-meter USB extension cable. He then used udev, a Linux application for managing connected devices, to lock the screen whenever the USB drive is removed. The end result is a laptop that locks itself whenever the magnetic link to the owner is severed.

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