Signal Generation

Discussion in 'The Projects Forum' started by csr1981, Aug 26, 2010.

  1. csr1981

    Thread Starter New Member

    Aug 25, 2010
    5
    0
    I want to generate the signals as attached in the image.
    The frequency of these signals should be variable.

    Can anybody help me with this
     
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  2. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    1. A processor can generate these signals
    2. An FSM in an FPGA can also generate these waveforms from a higher frequency clock.
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    A VCO might be able to do it too.

    What is the timing of the pulses? Or if it is that variable, how about duty cycles?
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Looks to me like the 2st waveform is a cam timing signal from a 6-cylinder engine. The "odd man out" pulse is the TDC signal, but it's sent ahead of time where the actual TDC occurs.

    Not absolutely sure what the 2nd waveform is, but it's 58 clocks, then 2 missing clocks.

    I guess our OP wants to build a test set for an ignition system.

    What's not readily apparent is the timing relationship of the 1st waveform to the 2nd waveform.

    Anyway, I think using a 4017 Johnson counter as a /6 gating a clock could be a good start on it.
     
  5. sage.radachowsky

    Member

    May 11, 2010
    241
    38
    A microcontroller with a crystal could be a good tool for this job.
     
  6. csr1981

    Thread Starter New Member

    Aug 25, 2010
    5
    0
    Hello Sgtwookie,

    you r right. these are cam and crank signals.

    any circuit you can provide would be great.
     
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