Hi Peter,
I am thinking Piezo element is a high impeadance device, you are probably feeding it through a small series capacitor, what would happen if you lower the impeadance with a resistor in parallel with the piezo element to help use up some of the power delivered through the capacitor? Then I believe the duty cycle change would have more effect.
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
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There simply is no "Happy Spam" If you do it you will disappear from this forum.
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