Temperature probe options


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  1. #1

    Default Temperature probe options

    I have a lot of an old PIC, the 16C72 and may use them in a temperature switch. I know the ADC is 8 bit but don't need real high accuracy in the readings.

    What would be my best options (or maybe my only options), for a ready made temperature probe? I see some on Ebay -- one that is LM35 based and another DS1820. Others ?

    Never messed around with temp sensors at all before. I do see some ready made code (or adaptable) for the DS1280 in the example programs.

    Thanks kindly.

  2. #2
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    Default Re: Temperature probe options

    What would be my best options
    LM35 output 10mV / deg , 8 bit ADC @5v is 20 mV / count , that's a pretty chunky result . 4x oversampling could help
    if you need to measure below 0c a neg voltage source is req.


    DS18S20 code is subtlety different to DS18B20 code , watch for that . either will measure sub zero C temps
    {I find if parasitic power not used and/or conversions are frequent they can self heat giving false readings unless well heatsinked }

    a DS1280 is part of a mac truck
    Warning I'm not a teacher

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    Default Re: Temperature probe options

    Ok -- yes, seems the DS1820 is the current "best choice". Thanks.

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