Jasen Betts wrote:
a computer with apropriate software could do that using the 16-bit ADC in the
soundcard for input, or you can buy specialised devices that come with
software too...

or a microcontroller could be combineed with a current source and sensitive
DAC to output resistance readings 100 or so times a second...
Waitaminit. I've long wondered if the soundcard could not take input
as data. Rather like the com port? where's this software? Linux?