22 bit adc and arduıno uno

Discussion in 'Embedded Systems and Microcontrollers' started by ozan, Apr 4, 2015.

  1. ozan

    Thread Starter New Member

    Mar 8, 2015
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    Hi Everybody
    I have a problem related to adc(mcp3553) and arduıno uno (it can be a mıcrocontroller.First of all let me mentıon my project .Data that I got from straın gages is amplified by AMP04(gain:200) and I gotta convert the data that is amplified. and then if it's done .I'm gonna make the communicate xbees(s2) each other.Please help me


    Thanks in Advance
    ozan SEREN
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    I cannot construct a mental picture from your words. Please post a readable schematic diagram.
     
  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    To get 22bits of anything you have to go to extraordinary lengths to eliminate ground loops, digital noise, thermal drift, get drift-free reference voltages, etc, etc. I can predict right now that you will be lucky to get 12bits...
     
    RichardO and blueroomelectronics like this.
  4. tshuck

    Well-Known Member

    Oct 18, 2012
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    I'm missing what the problem is.

    You may (will) have an issue getting anywhere near 22-bits of usable data, however...
     
  5. ozan

    Thread Starter New Member

    Mar 8, 2015
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    pictures
     
  6. ozan

    Thread Starter New Member

    Mar 8, 2015
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    how can I write program for mıcrocontroller actually ı want to disassembly just atmega328 and I want to do ıt vıa that
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    You have serious flaws in your design. MCP3553 ADC accepts differential inputs. You want to take full advantage of this.
    Remove all your opamps and connect the ADC differential inputs directly to the bridge.
    As others have said, you will not achieve anything close to 22 bits.
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
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  9. OBW0549

    Well-Known Member

    Mar 2, 2015
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    The schematic shown appears to come from this document,

    http://complex.umd.edu/papers/dissertations/new_torque_schematic_dissertation_Daniel_Zimmerman.pdf

    which is a correction to the diagram shown on page 310 of this doctoral dissertation,

    http://complex.umd.edu/papers/dissertations/dissertation_Daniel_Zimmerman.pdf

    by one Daniel S. Zimmerman.

    Zimmerman lists a URL for his Arduino source code, but it appears to be a dead link.

    To ozan: I think your best course of action would be to try to contact Dr. Zimmerman and ask him to email you the source code or give you a valid web link to it.

    For any of us here to help you, we would have to design the entire application for you and I doubt anyone would be willing to do that.
     
  10. Papabravo

    Expert

    Feb 24, 2006
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  11. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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  12. OBW0549

    Well-Known Member

    Mar 2, 2015
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    Pure luck. I looked at the schematic this fellow posted and got curious about the "Futek TF600" load cell he wanted to use; and when I googled that, one of the links that popped up was to Zimmerman's original schematic. And from there, I backed up one level and saw his full dissertation.
     
  13. Papabravo

    Expert

    Feb 24, 2006
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    Wow. I tried a couple of possible searches, but found no happiness.
    I suppose he must be trying to duplicate the original results.
     
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