Most of us can do simple math in our heads, but some people just can’t seem to add two numbers between 0 and 3 without using paper, like [Aliaksei Zholner] does with his fluidic adder circuit ...

What does half-adder actually mean? ... NOT 1 0 NOT 0 1 Trace the Circuit Yourself Select one of the four additions above the circuit diagram and place the two bits to be added at Input 1 and 2.