Jim,Arie,& Doug
   I like the idea also, in fact the 1211 ADC has a 4 channel mux. I am downloading
info on the simm but what are the power requirements? Would it be a possibility in a
remote location with a cell phone?  Keep us informed of what you all find out. I think
I'll purchace one myself.
 Barry



JIm Hannon wrote:

> Arie Verveer wrote:
>
> > Hi, In mid august, Doug ( Doug  ) mentioned a
> > project that was working on using a simm-sized micro controller that
> > implements TCP/IP  for a strong motion devices. Since then I have
> > purchased two of these controller boards and the company that
> > provides them are about to release an upgrade to the software the makes
> > it easier to access I/O through the units programming language, Java.
> > They have already released the documentation.  Given easy access to the
> > high speed hardware it would be simple to add some A/D chip. At the
> > moment the device's supported I/O is a "one wire interface" and serial
> > port.  I'm looking forward to the upgrade and access to the "real" I/O.
> >
> > My vote is for Doug's concept for the strong motion device for the schools.
> > Though the controller boards should have the better I/O software.
> > Better I/O means a huge range of possibilities.
> >
> > The device could then be plugged into a local school network. All you need
> > to do is give it a "IP" address. This coupled with a good 12 bit multi-channel
> > A/D chip and support software would make an impressive interface.
> > A/D chip -> LTC1290 ?
> >
> > The boards are cheap and powerful: see   http://www.ibutton.com/TINI/
> > Arie
>
> I second the idea of using the TINI board for the processor and network interface.
>
> For the sensors it seems like the silicon sensors used in the USGS design would
> meet most requrements. I would however eliminate the hand tweaked low pass filters
> of the USGS design  by using  Delta-Sigma A/D Converters such as the Burr Brown
> ADS1210 Without a lot of effort you can get 20 bits out of these converters and
> they are inexpensive.
>
> --
> Jim Hannon
> http://soli.inav.net~jmhannon/
> 42,11.90N,91,39.26W
> WB0TXL
>


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