Richard --

Check out the 1-wire devices.  See
http://www.maxim-ic.com/quick_view2.cfm?qv_pk=2921&ln=

This is in the 1-wire family of devices that only use one wire (plus
ground) to communicate with another 1-wire device or a host comptuer.  They
have adaptors for serial port and USB at the PC end.  See
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2995

Unfortunately, this is not a plug-n-play solution.  You'd have to do some
wiring and probably some software.

The 1-wire stuff looks like it might be useful in the future as the
technology matures.  Here is an overview:
http://www.maxim-ic.com/1-Wire.cfm

Karl Cunningham


--On Sunday, February 23, 2003 7:23 PM -0700 Richard Diaz 
wrote:

> I am from Colorado School of Mines and currently am working on a
> seismometer to be mass produced for general education classroom use.  We
> have been using the DATAQ instruments DI-194RS starter kit, but is not
> really streamlined for what we need it for.  I was thinking about an AD
> converter that only has two input, and outputs to a USB port, since it is
> becoming a mainstream method of PC input.  I am not really sure how to go
> about modifying and AD converter in such a manner.  If anyone has any
> insight, could you please assist?
> 
> 
> Thanks
> 
> 
> Richard Diaz
> Colorado School of Mines
> Engineering - Electrical Specialty
> Computer Science
> 
> 1807 W. Campus Rd
> Golden, CO 80401
> Home - (303)278-4157
> Mobile - (303)522-4801
> 
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