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> From: N STEENKAMP [M.ING E&E]
> > Well what I would do is use the good old 'first principles' formula for
> > capacitance reactance.  This will tell you the impeadence of the
capacitor.
> >  You could then include your cap in part of a bridge network and
accurately
> > find the capacitance that way.

What about rude and crude time constant approach like AN512 describes.
Ping the capacitor to charge it and then measure the time it takes for the
capacitor to discharge to below the ports turn-on threshold.  But, here you
are measuring capacitance instead of resistance.

Problem is that it would have a pretty narrow and presumably non linear
range.  Might be OK for Go/NoGo testing though.

Cheers,

Win Wiencke
Image Logic Corporation
ImageLogic@ibm.net