Implementation of logical operations on a domino substrate

Abstract. This paper presents some simple ideas about domino gates. Domino gates are implementations of logical operations using toppling dominos to represent the movement of information (bits). (...) The domino model can be used as a representation of single-shot wave gates in unconstrained media, such as sub-excitable Belousov-Zhabotinsky reactors. On a practical note, they are slightly easier to set up and use than collision models using 'billiard balls'.

More at the International Center of Unconventional Computing.