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Measuring low capacitance

Probably any standard multimeter have a capacitance measurement function. But they are limited in measuring small capacitance. Measuring below 200pF gives unreliable results. Also resolution varies around 1pF. If you’re radio amateur capacitance like 2.7pF is a common value that needs to be measured or checked. One way is to purchase precise LC meter or simply build a low cap meter from parts around you.

Following design is based on Attiny2313 microcontroller which measures capacitance from 1pF up to 2500pF with 0.1pF resolution. Results are displayed on standard LCD. Unit can be calibrated with 1000pF 1% capacitor. It is available as kit or take a chance to build it as all necessary info and software is available for download.

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One Comment

  1. Elektor is a stinky website!
    Registration… payment…

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