Bar Code scanner project

Discussion in 'The Projects Forum' started by Keith93, Jul 28, 2014.

  1. Keith93

    Thread Starter New Member

    Jul 28, 2014
    2
    0
    Hey guys,

    I am presently working on building a bar code scanner on the lines of a project I came across online.
    https://courses.cit.cornell.edu/ee476/FinalProjects/s2006/nrs27th257/nrs27th257/

    The circuit described in the link employs the use of LMC7111 Op-Amp , however I do not have it. What I do have is the OPA277 Op-Amp. Will it be able to get the job done ??

    Any help is greatly appreciated.

    Thanks.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    There is a difference between the opamps.
    The LMC7111 is a rail to rail output opamp:

    [​IMG]

    As the OPA277 is NOT rail to rail output:

    [​IMG]

    This may give problems.

    Bertus

    PS I have attached both datasheets.
     
  3. Keith93

    Thread Starter New Member

    Jul 28, 2014
    2
    0
    Thank You.
     
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