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Topic: Driving a piezo loudly! (Read 679 times) previous topic - next topic

allanhurst

The MAX232 psu generates +/-7v with a 7k load, only +5/-4 v with a !k load. It requires a +5v supply.

If you just want to to the job with a high voltage supply a boost convertor would be OK - but you then also need a suitable circuit to drive the piezo.

The op has already achieved 17vac from a 3v5 signal using a series resonant circuit. Since the waveform will be sine-ish that implies 48v p-p.

Allan

ted

we're running on a 3v battery - which is why i'm using a LC-circuit :)
This one is loud, 4.5V, for high voltage they are using autotransformer,


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