High Speed Inputs and Outputs
We go through how an encoder works
What it means to quadrature count, how counters determine direction, and go through an exercise to program a high speed counter in ladder logic to better understand how these high speed counters work.
Note, I was trying to make my diagram 3 dimensional so that you realized that the A and B were not touching but in hindsight, it added some confusion. These two signals are phase shifted 90 degrees which means the red line goes up/down in exactly the midpoint of the blue line and vice versa.