Peter Moreton wrote:
> 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.
I'll have a look at some of their specs; I would imagine there'd be a spec
on "max shock force" (in G's, presumably).   I'm going to have to figure out
what the actual max shock will be in my application... time for my physics
education at last!
Thanks to all for the pointers!
Jim


Other replies:
>
>
> > -----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
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> > >
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