If you want to see a temperature example, we’ve seen that done with an Arduino, too. PID is integral — sorry — to flight control systems and self-balancing robots, too.

Experience — or at least education — often makes a big difference to having a successful project. For example, if you didn’t think about it much, you might think it is simple to c… ...

Self-regulating systems with feedback loops, i.e., the routing back of the output of a system to its input, have existed since antiquity and have since become an integral part of modern technology.