Temperature Control

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hi folks.

i have question.  i need feedback system might have quite long feedback cycle.  in other words, resulting change in temperature might take time.  i need know how approach doesn't start fishtailing , fall out of working range.  

it's bbq want regulate temperature in.  if gets cold, want speed of fan blows air burner section.  the temperature rises , system should remain.  

the algo should designed find equilibrium.  the fan choosing 12v 120 ma fan.  initial readings suggest 500 ohms cover range quite nicely, might bit much.  the range i'm thinking 200 ohms, because of cfm rating on fan, , expectations.  it's narrow, , might increase cfm rating of such fan.  

anyway, have ideas how set up?  i thinking of potentiometer, that's manual thing.  how can arduino this?  

cheers

pid.  the drawback tuning.  systems long lag times can tedious reasonably tune.


Arduino Forum > Forum 2005-2010 (read only) > Software > Syntax & Programs > Temperature Control


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