Determining wheel speed

Discussion in 'General Electronics Chat' started by Loftie, May 26, 2015.

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  1. Loftie

    Thread Starter New Member

    May 26, 2015
    Good day

    I want to develop a launch control system for a student racing car where I need to cut engine spark if wheel slip is detected. I want to use a variable reluctant sensor with a sprocket to determine the speed at each wheel and the convert the frequency to a voltage using a LM2907/LM2917 IC. Then I want to feed these voltages into four 5V inputs of my arduino and apply the necessary logic. Any tips on how to approach this problem?

    King Regards
  2. wayneh


    Sep 9, 2010
    One thing that comes to mind is to eliminate the frequency-to-voltage-to-digital conversion and go straight into the Arduino with the frequency. Perhaps you would need a comparator to square up the signal for the Arduino.
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
    What is the absolute max frequency you expect to get out of the sensor? That will guide how best to process the signal.

  4. DickCappels


    Aug 21, 2008
    Welcome to the AAC forum.

    The owners of All About Circuits have elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

    This thread is against the AAC forum rules, Chapter 6, as seen here:

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    Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

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