This 'What is PID' video is the 2nd in the Closed loop system video series. It logically starts out with the PID definition. Then using an electronic PID controller, moves to explain feedforward control, PI controller and then P&ID. The example PID systems used is for a robot arm control.

Then ultimately on to the PID Blueprint Course with simulator at https://bin95.com/Training_Software/PID_tuning_calculator_tips.htm

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