Binary Counter (Two's Complement)

This counter works by flipping the 0 and 1 tiles in counting up and down. Two's complement representation is used to represent the negative numbers, which is an abstract concept for most students studying computing science.

Recently, I just find out that this binary counter can be used as a machine to find the two's complement of a binary number! Check out the videos here.

https://youtu.be/4ilts3owb0Q
https://www.youtube.com/watch?v=B4Pzorn4WlQ
https://youtu.be/pYgWKKvsdOk