PID is not difficult. It is very time consuming to get it right. It is a straightforward mathematical calculation. The dynamic reaction in the real world makes it hard. If you have an electronic thermostat at home it is PID controlled. So is your oven. I have worked on hundreds of PID equipped machines that use PID to control a moving mass driven by a motor and screw, a 6,000,000 btu burner (12…