keith1200rs said:Morgan Electroceramics have a very good 'book' on piezos you can download from their web site. I have used piezos quite a bit, from edrums to ultrasonic cleaners to underwater communications. What specific questions do you have (apart from which diode to use?
Keith
If you mechanically damp the crystal enough you can get just a single pulse, either positive or negative depending on how you connect the crystal. This is really a heavily damped ringing - so well damped that you only get half a sine wave of ringing.
keith1200rs said:The advantage of the DC-DC converters designed for the job is they have very low quiescent currents and low voltage drop bridge rectifier. So, you need to experiment, particularly if you don't know the nature of the piezo signals.
If you sufficiently damp a piezo signal you can get a half cycle "DC" signal.
I would start off with a diode or bridge using Schottky diodes & DC-DC converter. The LTC3588 uses a buck converter, so it is assuming a piezo voltage always above the output voltage. Again, that would seem a reasonable way to start until you can collect some data from your own system.
Keith.
studystudystudy said:there is one problem if i use the DC-DC converter either is buck or boost converter, its required a switch mostly like using mosfet. my circuit doesnt have any voltage to turn on the switch, all my circuit is passive component.
is there any way to implement the DC-DC converter?
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