AVR-Chat

Hi all,

I have often had students have a go at this with little success 
because they want to do it "cheaply" with "little effort".

One suggestion I had for them was to, attempt to measure the 
Q ( quality factor ) or D(dissipation fact which is the inverse of Q)
using some AC technique to avoid any polarization effect.

alternativily , measuring the Tau ( RC timeconstant) might do it.  
This might be achieved by applying a square wave to the sensors 
(capacitor) and measuring the resultant charge after a few 
milliseconds.

Lee de Vries 

In theory, there is no difference between theory and practice
but, in practice, there is."
or its corrolary
"In theory, practice is simple."