This can fit into any number of cool categories, but thought to first share it here:
quick synopsis:
If you have an old NES console in the attic you might be
able to create something similar to Waterloo Labs who have modded a
NES to allow Mario to be controlled by the players eyes. Electrodes have
been placed around the eyes to track the movement of a players eyeballs,
they were able to jury rig a Nintendo to accept eye movement as controller input.
But as you can imagine it isn’t the easiest thing to do considering you need to
keep your eyes on Mario to make sure he doesn’t fall foul of any nasties or falls.
[
geeky-gadgets.]