PID Controller Working Principle

Quite nicely, thank you.

PID controller - Wikipedia, the free encyclopedia

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If you don't SHOUT people may be inclined to help.

But in this instance I doubt it very much. You are too lazy to do your own homework, why should someone else (who you have shouted at) help?

The same way it operates in all other controllers. Proportional to the error, the integral of the error over time and the derivative of the error with respect to time.

These things work much better when one turns off Caps Lock first, though.

Have you ever used the cruise control in a car? That's a PID controller. You set a value that you want to maintain, the controller maintains it.

Aw, that's a speed controller. The original poster wanted a temperature controller.

Oops, my bad, I should have realized that if the OP is incapable of performing a simplistic search of the copious amounts of available data on the subject, they would be highly unlikely to grasp the concept of simile.

What was I thinking....