Temp readings and voltage input

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  1. - 4th July 2008, 01:09 #17
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    Squibcakes
    Squibcakes is offline Member
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    Hey Ace,

    The Carbsmart uses a 100K thermistor (supposedly a ntsa0wf104fe1b0). I have a spare and was thinking of using it with a pic to do some temp recordings to see how my temps are going.

    I just need some advise on the circuit design. I was going to use a 5V regulator to supply the pic and ref for the thermistor. Also use a 100k resistor as a voltage divider as my analog voltage input to the pic. Is this enough?

    Also, the thermistor has a current rating of 0.14ma @25C. Does that mean max current draw through the ntc over the entire temp range or what?

    See attached circuit.
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