Prison inmates have a history of being gruesomely resourceful hackers. The toothbrush shiv comes immediately to mind. One such inmate in the UK wanted to offer tattoos to his fellow convicts so he came up with a tattoo gun using a PlayStation for parts. The crude setup involves a sharpened ballpoint pen and the use one of the motors from the optical drive to move it up and down. The inmate didn’t document his work for us but there are other examples of this method available. Even with modern hardware, ink seems a little 20th century when compared to laser tats.
[Thanks Memmy T]
What can you build with a ballpoint pen and some extra parts? [gzip] found himself with a bonus box of right angle switches and other miscellaneous parts and set out to build a joystick. Simple arcade joysticks use switches that are actuated by the movement of the stick and this design embraces the concept. The four tactile switches are mounted on protoboard facing each other with part of a ballpoint pen in the middle. When the pen is moved it presses against one or more switches to close, completing a circuit. For good measure he even incorporated a fire button into the top of the “stick”. Now we just need someone to make this work with a tiny Ms. Pac-Man emulator.