This you’ve got to see.
Pongmechanik is an electromechanical conversion of the classical game Pong. And instead of more realistic graphics, it ever accurately to reproduces the original Pong. The user is hardly changed. However the game breaks open the Black box: What takes place in the computer, becomes again perceptible and comprehensible.
Pongmechanik is an absolutely physical game. The game is realized electromechanically, and essentially consists of four elements: A relay computer, the mechanical movement with collision detection, the display and the acoustic components.
Be sure to watch the video of the thing in action.