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Pic capmeter

Discussion in 'General Electronics' started by paul, Jun 20, 2004.

  1. paul

    paul Guest

    Hi,
    I was wondering if anyone knew of any links to a site which could
    provide some info/pic code on building a capacitance meter using two
    555 timers and a 16f874 .I'm hoping to take the time difference
    between the two timers when an unknown capacitance is introduced to
    the 2nd 555 timer and feed it into a pic ,do the maths and feed the
    o/p via RS232 for on screen display using VB6
    I've seen an example on Microchip's website AN611 but I wanted to use
    555 timers as opposed to RC networks

    Any help appreciated

    Regards

    Paul
     
  2. Jim Simmons

    Jim Simmons Guest

    Check out this page: http://elm-chan.org/works/cmc/report.html

    Jim
     
  3. You should check out the AADE capacitance/inductance meter. It uses
    resonant frequencies to do the measurement, and works pretty well.

    He gives a schematic for the meter. You'll have to write the software
    for the PIC.

    Regards,
    Bob Monsen
     
  4. Fhyndoh

    Fhyndoh Guest

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