0Hz - 600Hz 5v Square Wave Doubler

Discussion in 'General Electronics Chat' started by madhushankarox, Mar 30, 2015.

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  1. madhushankarox

    Thread Starter New Member

    Mar 30, 2015
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    I'm new to this forum and this is my 1st post to ask some help from electronic experts :)
    First of all I'm not an Electronic expert or I don't have knowledge to design electronic circuits.

    Can some one help me to build a square wave doubler circuit to multiply the frequency of a variable square wave? I have an electronic speedometer to be calibrated, so the issue is my speedometer reads 50% off from the actual speed (due to a incompatible sensor).


    Sensor output is a 5v square wave.
    Frequency will be 0Hz to 600Hz (169.9Hz = 60Km/h)


    Here is the speedometer's PCB:

    [​IMG]

    (I have tried JayCar speedometer calibration unit too. It was failed to detect the input signal)
     
    Last edited: Mar 30, 2015
  2. madhushankarox

    Thread Starter New Member

    Mar 30, 2015
    11
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    Will this work? If so, what will be the C1, C2 values :)

    [​IMG]
     
  3. DickCappels

    Moderator

    Aug 21, 2008
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    Where does this speedometer come from? Where was it installed?
     
  4. madhushankarox

    Thread Starter New Member

    Mar 30, 2015
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    Hi, Thanks for the reply. It is from a 1996 Nissan Caravan Coach. Installed on the dashboard cluster.
     
  5. DickCappels

    Moderator

    Aug 21, 2008
    2,659
    632
    We are not allowed to discuss automotive modifications, or in this case, repairs on this site.

    I am closing this thread as it violates the Terms of Service of the All About Circuits forum:

    This is an excerpt of our ToS:Terms of Service
     
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