from the mind-is-a-terrible-thing-to-tase dept.
wintersynth writes "We hacked a toy brainwave reader to electrocute people if their brainwave frequency got too high (by concentrating). We took outputs off of the 5 level LED indicator, put the outputs through a transistor/resistor/relay circuit to give 2 levels of high voltage through an electric shock circuit right into the user's arm."
... though his invention worked superbly -- his theory was a crock of sewage
from beginning to end.
-- Vernor Vinge, "The Peace War"