Mechanical 1 Bit Adder (Using Logic Gates)

This is a 1-bit adder using mechanical logic gates. Which uses the wiring you would use (image above) if you were normally making a 1-bit adder electronically.

A and B are the bit you want to add and Carry In is if there was an additional digit that was supposed to be carried over from a previous calculation
(You would use this to combine 1-bit adders to make 4-bit adders. But that isn't possible with this design for reasons I'll talk about a bit later.)

In order to input a 1 to an input gear, you turn it (following the arrow) a half turn and in order to input a 0, you turn that input gear a full turn.
After you've done a calculation be sure to reset the carry gear to the original position.
(use image as a guide)

I am aware that there are way better and easier ways to mechanically do addition. This was more an excuse to make/mess around with logic gates with gears which had been on my mind for a while.

The logic gates took different shapes through the design process,