Hello everyone...

There has been a recent discussion on using piezo buzzers on logic pins...
I was unaware of of the whole capacitive loading problem etc. etc., but
find it very interesting. One thing that I have done to increase the output
volume of the buzzer moderately is to connect both piezo terminals to
output bins,  and then to pull one pin high whilst pulling the other low
(and vice versa).  This gives you ~10V accross the buzzer, if your pic is
running at 5 V.

Cheers
        Roland