Algorithm for temperature control

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I am a computer engineering student and am working on a PCR Thermocycler.

I need to have a certain precise temperature to be able to perform all the steps of the process, and I’m having some problems with that. I and my team are using simple on-off to control the temperature, it works, but we have an average of 1°c temperature variation and that’s not very good for a PCR, the big question is, would any of you have knowledge of a temperature control algorithm that is efficient and gives me the lowest possible temperature variation?

algorithm
  • 7

    This question seems to be discounted because it is in EN in SOPT.

  • 4

    Welcome to Stackoverflow in English. The official language used here is English, can you translate your question? If you prefer you can ask the same question in Stackoverflow.com.

  • 2

    Please Translate this Question to English or use the standard version of the SO.

  • 5

    It needs to be more specific by saying which language, showing the code it has and which values come out and which should come out.

1 answer

2

Turning off and on you will get beyond a variation of 1ºc, you will also get a physical wear of the relee (I imagine you are using it), depending on the microcontroller and the level of programming you are doing (whether working directly on the micro or via an external API) I recommend using PWM. If you post more information about the project I can give you more suggestions. I believe that today, all microcontrollers have at least 3 pins with PWM outputs, in these outputs you can modulate the pulse (ie not having 5v continuous or 3.3 continuous) thus giving more precision to the temperature

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