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Subject: Re: piezo voltage sense
Date: Wed, 23 Oct 2002 00:53:42 GMT
NNTP-Posting-Date: Tue, 22 Oct 2002 20:53:42 EDT
Thanks. As you can see i studied economics in college.
i have a piezo accelerometer that is linear 1 v per g of accel or decel
i want to sense a - or + 10g force on +x axis or -x axis. the
accellerometer is +10 in +x axis and is +10 on (otherwise negative leg)
of -x axis. i feel a diode bridge to rectify output to + on either leg
will suffice then a simple comparator for sensing the +10v threshold.
N. Thornton wrote:
> garwood wrote in message news:<3DB33417.3B414EF1@bellatlantic.net>...
> > i have a piezo strip that creates ac + - ac voltage when disturbed. i
> > want to sense both + and - 10v ac . I think that i can use a bridge
> > diode (with rc for smoothing) to output dc signal then use a comparator
> > to trigger > 10volts for a trigger. The + and - signals shall be 20-50
> > mseconds in duration. I do not care about under or over +-10volts.
> > what do you think? Thanks
> I think you could do with explaining clearly, this seems pretty
> ambiguous. I dont even know what youre trying to do here. Perhaps then
> you will get much more help.
> Regards, NT
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