Hello all. I'm working on a community art project which will require me to determine where a flying object crosses a plane (looking for x,y coords). I had an idea to use a row of photoresistors along each of the x and y axes, then have corresponding rows of LEDs across from them. Then I would want to read data from the photoresistors to determine which LED beams have been broken, so I can plot the position of the object.
Is it feasible to read data from 72 photoresistors with an Uno?
If so, can I do it quickly enough to detect object moving quickly through the plane?
I guess I would need to use something like shift registers daisy-chained to use that many inputs. I have a bunch of these shift registers. Some people have told me it's doable, and some said I'll need to figure out a different way to go about it. I found this thread that seems like a similar issue, but I'm new to hardware and still pretty unclear on if that would work, so any guidance is much appreciated. Thanks.