Capacitor Measurement

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  1. - 21st August 2006, 23:45 #1
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    AMay
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    Default RCTIME function

    Thanks for the response.

    I can imagine a constant current source.
    I can imagine starting it, and stopping it with a comparator.
    I can't imagine how to time the interval in PIC basic. The books I have don't help, or I am not looking in the right place. (I am just a retired bookkeeper having fun with this.)

    I don't want to get involved with a separate counter. The author who got me started on this ran into all kinds of stability problems with his on the small caps.
  2. - 22nd August 2006, 15:15 #2
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    Wink Elektor !!!

    Hi,

    Some times ago, Elektor published a nice project about a capacitance meter; It's not PbP, but fairly works ...

    Project N° 020144 ... Programmed PIC and PCB available.

    Good choice ... if for measuring !!!

    Alain
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    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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    IF there is the word "Problem" in your question ...
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  3. - 22nd August 2006, 16:23 #3
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    here's a good one but it's not basic either
    http://www.ubasics.com/adam/pic/archive.shtml
    Autoranging Digital Capacitance Meter .01pF to 16,777.215 uF
    by Fr. Tom McGahee
    it's at the bottom of the page
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