Voltage Clamp - 5v boost sensor

Discussion in 'The Projects Forum' started by neddy, Jun 5, 2011.

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  1. neddy

    Thread Starter New Member

    Jun 5, 2011
    I am trying to make a voltage clamp for an automotive boost sensor.
    the sensor on the vehicle has a range of approx 0.8v at atmosphere and 3.0v+ under boost. i wish to clamp it at approx 2.5v - 2.6v,

    I built a silicon chip Fuel cut defender ( http://www.siliconchip.com.au/cms/A_108397/article.html ) but if any voltage of less than 1.4v is on the input the output stays at 1.4v and i do not understand why. above 1.4v the input and output are approx the same until the clamping voltage, as expected

    an alternative circuit or other suggestion would be much appreciated.
  2. hgmjr

    Retired Moderator

    Jan 28, 2005

    I am closing this thread as it violates AAC policy and/or safety issues.

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    There will be enough sites where automotive questions can be discussed :
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