Fig. 3.

OR and AND logic gates are depicted symbolically, along with truth tables summarizing their two binary inputs and resulting binary output values (A and D); because the two inputs are binary, four distinct states exist for each gate. The pneumatic connections for the OR and AND gates are shown in B and E, respectively, with schematic representations of the valves in each of their four possible states (direct connections from either of the inputs to the output are shaded). We experimentally characterized these logic gates over each of their four possible states by varying the two inputs independently (C and F).