You may find that the Analog MEMS accelerometers are destroyed by the
shock-load that you describe. The datasheets specifically warn about
dropping the device onto a hard surface, which can subject it to a several
hundred-G force, and destroy the accelerometer.


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Gordon Williams
> Sent: 28 May 2004 22:04
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE:] Looking for accelerometer
>
>
> Hi,
>
> I think that you would be better off with one of the MEMS
> components for
> ease of use, low frequency and high shock.
>
> You will find lots of them out there and they are quite
> accurate and easy to
> use.
>
> Regards
>
> Gordon Williams
> Ottawa, Canada
>
> ----- Original Message -----
> From: "Jim Tellier" <jimtellier@COX.NET>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Friday, May 28, 2004 4:00 PM
> Subject: [EE:] Looking for accelerometer
>
>
> > Hi folks...
> >    I've not used an accelerometer in a project before, so I
> wonder if
> anyone
> > can give recommendations.  I think what I'm after is one of
> the piezo-type
> > devices; preferably in a very small surface-mount package.
> All I really
> > need is a single-axis capability, but I do need to sense
> bidirectionally
> on
> > that axis.  It needs to be low-voltage (3VDC would be
> ideal), and have
> > excellent low freq response (below 2 Hz).  I don't care much about
> anything
> > above 100Hz.  It also needs to have good immunity to
> physical shock (e.g.,
> > when the moving component carrying the sensor slams into a
> fixed object);
> on
> > this point, I don't yet know how to characterize that force
> - I know the
> > mass of the moving component, but not (yet) the force being
> applied to
> make
> > it move.  (p.s. I'm not a physicist, either :^)... just a
> software guy,
> > mostly, so if you have any suggestions around that I'd appreciate
> hearing!).
> >   Thanks for any ideas you might have!
> > Jim
> >
> > > http://www.piclist.com hint: The list server can filter
> out subtopics
> > > (like ads or off topics) for you. See
> http://www.piclist.com/#topics
> >
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