Binary 1bit Adder in TIM | January 2009

In the last weeks I've been playing TIM the first part of the series. I've wondered whether you can build some basic gatters like AND, OR and NOT without triggers or switches.

Finally I've built a machine with two input signals (the balls on the left) that calculates the result of a 1bit-addition.

C = A and B
S = (A or B) and not (A and B) = A xor B

C=Carry   S=Sum

Here you can see my machine in action:

(originally posted 2009-01-03)

posted 2009-01-02