DIY USB Dongle Pranks Users by Toggling Caps Lock

By Jason Fitzpatrick on May 4th, 2011

If you’re looking for a great way to prank your coworkers, this clever and stealthy USB hack randomly toggles the Caps Lock on and off.

The heart of the hack is taking an old USB memory stick and modifying it so that it presents itself to the computer as a keyboard. Once attached to the computer the fake “keyboard” sends the signal to toggle the Caps Lock every few minutes. Unlike software-based pranks your victim can reboot the computer and the fake USB keyboard will mount again and resume toggling the Caps Lock until it is physically discovered and removed from the machine.

Hit up the link below for additional information and schematics.

USB HID Device Prank [via Hack A Day]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 05/4/11
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