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Frequency multiplier

Discussion in 'General Electronics Discussion' started by Wychwar, Sep 27, 2009.

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  1. Wychwar


    Jun 16, 2009
    Is there any component or circuit to multiply the pulses generated by an infra-red sensor, sensing 1 white mark per revolution, by 60 times. The pulses to feed a circuit which outputs to a digital frequency meter. The display would indicate the revolutions per minute of the shaft.

    Regards All,

    ADDITIONAL. I can achieve the results without any electronic multiplication if I use 60 white marks, but would prefer to use only one.
    Last edited: Sep 27, 2009
  2. Resqueline


    Jul 31, 2009
    What you need seems to be a phase-locked-loop. I won't provide a diagram but I'm confident a search will turn up just what you're looking for. One example of a PLL IC is a CMOS 4046 (iIrc).
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