Hey thanks for reminding me about PID controllers. I took controls last semester, but I need to brush up a little bit on it. PID would be a closed feedback loop, where one measures the output with respect to a desirable output, and make changes to get desirable output correct? I did not know there was an Arduino PID library. I will look into it, but since you have implemented the library, how does it work? Thank you!!!
I did PID from scratch before the PC existed using a PDP-11 and an HP 85/86.