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High resolution capacitance meter project

Posted on Friday, December 20th, 2013 in measurement by DP

Cap_meter_veroboard_done

Puretus has been working on  a high resolution capacitance meter:

One day I was looking for methods to measure capacitances of cap components. Even though it is pretty trivial now with my new Brymen  multimeter, I ran into this design by Roman Black which turned out to be very well explained and in terms of learning this looks an interesting project to build. I was hoping that Roman would have included source code for the PIC16F628.

This entry was posted on Friday, December 20th, 2013 at 9:00 pm and is filed under measurement. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “High resolution capacitance meter project”

  1. Jim B says:

    I’m confused about the “high res” claims. This uses a 1% reference resistor; what is the point of having a six digit display if the bottom three or four are random numbers?

    • Per says:

      @Jim B: Read the “Real” accuracy section for a bit more detail about the accuracy.
      I agree that it’s a bit confusing though. If you really need 7 digits you probably care about precision a bit more than that. Of course, if you want to build one you’re free to choose higher precision components and even add components for calibration.

  2. This too, I need to look into (as well as Doc Brown’s Capacitor ESR meter!)

  3. Mick M says:

    The lnk is a “404” now.

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