On Aug 11, 5:42*pm, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:
...
For the Data Acquisition Units (the A/D) see DATAQ.com. *Their 148U
devices are cheap and reliable.
LLoyd-

I have the DI-194RS. You can decrease the input range and improve the
resolution by removing the input resistor divider.
http://www.dataq.com/gl/starterkit.htm

jsw