Ultra compact full adder V1.2

I have built a compact 1-bit ripple full adder; the dimensions are 5 wide by 8 tall with a depth of 2. I was able to make this very small thanks to my XOR gate, which is 4x2x4 and on my Reddit.

I stacked two of my XOR gates on top of each other, and for the carry-out, I used the fact that both XOR gates already have a torch that works when both inputs are on; I simply ORed these signals together.

I have managed to place inputs A and B on the base and the carry-out on the side. So this can be stacked on in front of the other with a 1-block gap and one extra block on the side to accommodate the extra wiring. This allows the carry-in and carry-out to be on the same side.

V1.2 iterates on my last design (V1.1) by reducing the width from 6 to 5 blocks, bringing the totalbounding-box volume from 96 to 80. This design also reduces the tick count on the carry input to 4 redstone ticks.

This is done in Java Edition.

• Reddit, u/Aggravating_Quiet_85