Negative voltage

Discussion in 'The Projects Forum' started by a_s_impressed, Jul 1, 2008.

  1. a_s_impressed

    Thread Starter New Member

    Jul 1, 2008
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    I am using the A/D of a pic16f877. the input channel is connected to the output of an opamp which ranges from: -6 to 5 volt.

    I want to cut the negative range.

    any suggestions?

    thanks in advance :)
     
  2. Pulsar Flyer

    New Member

    Jul 1, 2008
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    When you say "cut" the negative voltage, do you mean you want to eliminate it? or wouldt you like to retain the info in the negative votage and re-scale so you only see positive voltage?
     
  3. a_s_impressed

    Thread Starter New Member

    Jul 1, 2008
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    0
    yes, I mean to eliminate it. the range -6 to 0 V has no meaning for me.
     
  4. a_s_impressed

    Thread Starter New Member

    Jul 1, 2008
    8
    0
    By the way, I have tried an opamp-741 as a buffer with its -Vcc connected to GND but the o/p showed the same negative input :confused:
     
  5. nanovate

    Distinguished Member

    May 7, 2007
    665
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  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    656
    You can do it like this.
     
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