Re: Full-Adder (3 Gates)

Posted by ouverson on May 20, 2019; 1:57pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Full-Adder-3-Gates-tp4029696p4033177.html

Looking at truth table I see that if a==0 then half-adder, else half-adder not. I have played with many combinations of gates: 1 and 2 half-adders in combination with Mux, DMux and Not with no success.

It seems that I should be able to use 1 half-adder and invert if a==1. Not sure how to wire together an "if else" statement using gates.

I do enjoy "the hunt" so don't want you to give me the answer, but if you could point me in the right direction I'd much appreciate it.