  Excitation waves on a sub-excitable Belousov Zhabotinsky (BZ) substrate can
be manipulated by chemical variations in the substrate and by interactions with
other waves. Symbolic assignment and interpretation of wave dynamics can be
used to perform logical and arithmetic computations. We present chemical
analogs of elementary logic and arithmetic circuits created entirely from
interconnected arrangements of individual BZ encapsulated cell like discs.
Inter-disc wave migration is confined in carefully positioned connecting pores.
This connection limits wave expansion and unifies the input-output
characteristic of the discs. Circuit designs derived from numeric simulations
are optically encoded onto a homogeneous photo-sensitive BZ substrate.
