Frequency Doubler.

Discussion in 'General Electronics Chat' started by Ferret, Feb 27, 2009.

  1. Ferret

    Thread Starter New Member

    Feb 27, 2009

    I hope someone can help... Basically, I own a 2000 Ford Mondeo 1.6, and my speedo is reading half of my actual speed. Now we've got it down to something inside the gearbox.

    So, I now need to bring my speedo up - And the only method I can think of using is a frequency doubler.

    The frequency doubler will need to be put on the wire for the VSS (Vehicle Speed Sensor)

    I believe it to be a sine wave, at 4000PPM.

    Thanks alot,
    Ferret !
  2. jpanhalt


    Jan 18, 2008
    That is strange. If it is exactly 2:1, that would also be a bit strange for gearing where the center distance between the driving and driven gear are probably not adjustable.

    How do you know it is in the gear box and not in the instrument cluster?

  3. Ferret

    Thread Starter New Member

    Feb 27, 2009
    I'm not entirely sure if it's 2:1, but it's as near as dammit !

    I know it's in the box, because I got a new VSS and wired it direct to another set of clocks... So the only thing that's left is something in the box !