No, I don't and I'll look into your suggestion; thanks!

Mark


ivp wrote:
>> It's a two-terminal device; I am driving it with a 1500 Hz square wave
>
> Do you have any other components connected to it ? A small inductor
> in parallel with the piezo, for resonance, will increase loudness. So 
> will
> a resistor, to a lesser extent. For example the beeper in a watch is 
> often
> a disc piezo + inductor. Without R or L the sound is quite weak
>
> Attached are a couple of circuits I use (although 50V is pushing it a
> little)
>
> wbr
>
> ------------------------------------------------------------------------
>
>
> ------------------------------------------------------------------------
>
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