>
>It can't work that way.  Power is force *times* motion.  You have a force
>but no motion "while compressed", so therefore no power is being put into
>the crystal and power can't be taken out continously.

The thing that's not so obvious here, is that the energy from the 
compression is stored charge in the capacitance of the crystal.
When you use it, you've discharged the cap.
When you relax the crystal, it will generate in the other polarity, 
which you can dump or recover as you wish, then you have to do it again.


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist