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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
Digital capacitance meter
4. June 2009 - 17:53 — admin
An older (2003), but still good circuit: Capacitance meter with AVR AT90S2313 by ELM.
If you have a spare old 90S2313, this meter should be a good choice to build!
This meter uses the integration method. There is an advantage that the resulut can be got as a digital data directly because it bases measurement of time, accurate analog circuit is not required and its calibration can be done easy by using a microcontroller. Therefor the integration method is suitable for hand built capacitance meter with high realizability.
Meter has an autoranging feature, switching between ranges from pF up to ca 400µF.