I wish i would of presented this project earlier, since it is such a great prank for April the 1st, better luck next year with this prank. The bug based on a ATTiny45 micro-controller was designed to be plugged in into an available USB port, and to remain there unnoticeable. The bug than takes control of the caps lock function turning it on and off. You must imagine that the person sitting at that computer will go nuts trying to figure what’s happening. The bug is versatile and can be reprogrammed to take control of any key you wish.
A practical joke for playing on anybody who uses an infrared remote to control electrical equipment such as a television. The IR-ritator can jam a remote control and make it seem unreliable, and it can also record and mimic a remote control and disrupt the normal operation of a piece of equipment.
The IR-ritator prank: [Link]