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can I hire somebody here?

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by joe_rocket, Jan 9, 2010.

  1. joe_rocket

    joe_rocket New Member

    Joined:
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    okla
    I thought hysteresis on one meant one would have a "lag" and therefore produce a different voltage if the rate was increased too fast
     
  2. mbarazeen

    mbarazeen Member

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    saudi arabia, srilanka
    both will reflect the frequency very fast, so its not propper way to find rate of change of freq. what you think in your mind is done easily by the differentiator, instead of 374 you still can use another OP-07, the dual voltage op-amp as a non inverting amplifier and as a differentiator for the next two steps before feeding it to the comparator. dont forget the out put of F-V conv is a negetive voltage and when you feed the differentiator its again inverted. ie for +ve change of rate of freq above the set limit you will get the trigger.
     
    Last edited: Feb 11, 2010

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