From: Goring, Steve <Steve.Goring@BSKYB.COM>
Subject: Re: [EE]: Phased arrays, ultrasound etc.


>I am developing a small ROV and the next bit involves some
>underwater sonar ( freq range 40 - 500 khz ).

I've always wanted a pro-active fishing bot. I need a graph of energy vs.
range for stunning various fish with underwater arcs. Anyways its easy to
electricaly mill metal patterns on piezo disks, but I didn't have much luck
etching the BaTiO ceramic. Anyone know a good etchant for piezo disks?

Scott

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