Here are the standard digital Gates (AND, OR, XOR, NAND, NOR, and XNOR) and a buffer models. I took the design from a explanation provide by Joshua Hawcroft at https://www.youtube.com/watch?v=9a7XQmEBK5Q. When I have time, I might develop the logic blocks. I have think of simulating electricity which I could use either a collision electron/expanding-shrinking wire to trigger either python code or even a logic block/message. Here is an update. If you plan to use it to simulate an Adder use blenders Append function.