[Harvs] hacked a cheap PID controller he found ... this meant the controller was assuming the cold junction was at room temperature, and would in many cases be significantly inaccurate.

The dual-channel PID controller was originally meant as a humidity and temperature controller and was based on existing software for an ATmega328. But after years of tinkering, adding new features ...

For example, a temperature sensor positioned a long distance from a heater can slow response to dynamic changes. Changes in machines and processes due to disturbances and set point changes are why PID ...

But in many instances, no amount of adjustment of the proportional-integral-derivative (PID) parameters will ... installed gain to replace the control valves. The cascade control system in figure 5 ...