I won't cover each logic gate's truth table as that can be Googled relatively easily, but to calculate the digit place being added, 2 XOR logic gates are used, which are 2 levers of each full adder and its previous carry. Any change in the input levers will immediately start updating the output sum without any additional lever pulls, and no resets are required after each addition, as their states are all stored and can be operated as many times as you'd like with no limit.ģ types of logic gates are used. I also made this design with the strict goal that this imitates digital electronics as close as possible rather than use specific Terraria game mechanics to accomplish the goal, so as such, the adder is fully automatic and each logic gate simulates digital electronics as much as possible, something that Terraria makes difficult to do since circuitry here works differently.
Using this series of full adders, which differ from half adders in the fact that they can accept and calculate with carries, any changes in input "ripple" changes across to the final adder, updating everything on the way, thus the name. In each addition, each digit of the 2 binary numbers are added together, and any carries are then added to the next bit adder, very similar to how addition and regrouping works when adding on paper. The 8-bit RC adder consists of 8 completely identical full adders. In this type of adder, IRL digital electronics circuitry logic is used to perform calculations rather than the hoiktronics methods seen so far. I arranged the torches in a way that looks exactly like adding 2 numbers on paper, except in binary instead of decimal of course, so it should be pretty intuitive to add them up yourself even without the adder doing it, if you know binary. The red and blue torch indicates which inputs are currently on and off, and the green torch below them are the output.
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