I need to detect end-of-travel of a stepper. There is no good way to use a limit switch (the obvious solution) because it takes several revolutions of the stepper to move between the limits and there is no place I can mount six limit switches on the small volume being controlled by three steppers (not x, y and z, but zoom, aperture and focus). So I want to look for the current spike when the steppers hit the end. I am using a RasPi 4 and the stepper {shields, bonnets, hats, whatever, I can't track all the terms} I just ordered. What I want to do is generate a digital signal when I hit the end of travel. While I can probably do this with a sense resistor and some simple circuitry behind it, I am looking ideally for a prepackaged solution that might support all three steppers on one breakout, or even a sense chip that can monitor more than one current sensor and produce a clean digital signal without having to use discrete Schmitt trigger chips and a bunch of analog circuitry. Nothing jumped out at me from DigiKey searches