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DS1821 Temperature probe help

Discussion in 'Electronic Basics' started by Rick, Dec 2, 2003.

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  1. Rick

    Rick Guest

    Hi,

    I'm trying to solder a DS1821 chip onto a board and connect it to an
    ATMega128 for reading temperatures. I'm not too good with reading
    electrical diagrams and I can't figure out how I should solder the wires
    etc.

    Please can someone have a look at the following link for the layout of
    the DS1821 and tell me how it should be connected?

    http://pdfserv.maxim-ic.com/arpdf/DS1821.pdf

    I don't understand the part where the resister needs to be connected to
    the DQ pin and then it says "Vcc" there.. does this mean that the DQ pin
    needs to be joined with Vcc (the power) with the resister in between?
    Please help before I blow the chip :(

    Thanks!


    Rick
     
  2. Rich Grise

    Rich Grise Guest

    Yes, guardedly. Are you sure you're familiar with how to program
    it and all the software support it needs? The 4.7K is a pullup
    resistor. DQ is either an input or output, depending on what mode
    it's in. If you're looking for just a plain temperature indicator,
    there are other chips that are a lot less complex to program.

    Good Luck!
    Rich
     
  3. Rick

    Rick Guest

    Thanks :) Got it working!


    Rick
     
  4. Rich Grise

    Rich Grise Guest

    Cool! It's always nice to get feedback of any kind, and this kind
    ("It Works!") is especially nice. :)

    Cheers!
    Rich
     
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